[libcamera-devel] lc-compliance: Add a libcamera compliance tool
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Message ID 20210129165336.256739-1-niklas.soderlund@ragnatech.se
State Superseded
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Series
  • [libcamera-devel] lc-compliance: Add a libcamera compliance tool
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Commit Message

Niklas Söderlund Jan. 29, 2021, 4:53 p.m. UTC
Add a compliance tool to ease testing of cameras on target. In contrast
to the unit-tests under test/ that aims to test the internal components
of libcamera the compliance aims to test application use-cases and to
some extend the public API.

This change adds the boilerplate code for a simple framework to write
tests in as well as two simple test. The tests aims both to demonstrate
the tool and to catch real problems. The tests added are:

 - Test that if one queues exactly N requests to a camera exactly N
   requests are eventually completed.

 - Test that a configured camera can be started and stopped multiple
   times in an attempt to exercise cleanup code paths otherwise not
   often tested with 'cam' for example.

Example pass run on Raspberry Pi:

  $ LIBCAMERA_LOG_LEVELS="*:ERROR" lc-compliance -c "/base/soc/i2c0mux/i2c@1/imx219@10"
  [2:36:17.672447527] [11896] ERROR V4L2 v4l2_device.cpp:191 'imx219 10-0010': Control 0x009a0922 not found
  [2:36:17.673095289] [11896] ERROR V4L2 v4l2_subdevice.cpp:285 'imx219 10-0010': Unable to get rectangle 2 on pad 0: Invalid argument
  Using camera /base/soc/i2c0mux/i2c@1/imx219@10
  Test single capture cycles
  - SKIP - Camera needs 4 requests, can't test only 1
  - SKIP - Camera needs 4 requests, can't test only 2
  - SKIP - Camera needs 4 requests, can't test only 3
  - PASS - Balanced capture of 5 requests with 1 start cycles
  - PASS - Balanced capture of 8 requests with 1 start cycles
  - PASS - Balanced capture of 13 requests with 1 start cycles
  - PASS - Balanced capture of 21 requests with 1 start cycles
  - PASS - Balanced capture of 34 requests with 1 start cycles
  - PASS - Balanced capture of 55 requests with 1 start cycles
  - PASS - Balanced capture of 89 requests with 1 start cycles
  Test multiple start/stop cycles
  - SKIP - Camera needs 4 requests, can't test only 1
  - SKIP - Camera needs 4 requests, can't test only 2
  - SKIP - Camera needs 4 requests, can't test only 3
  - PASS - Balanced capture of 5 requests with 3 start cycles
  - PASS - Balanced capture of 8 requests with 3 start cycles
  - PASS - Balanced capture of 13 requests with 3 start cycles
  - PASS - Balanced capture of 21 requests with 3 start cycles
  - PASS - Balanced capture of 34 requests with 3 start cycles
  - PASS - Balanced capture of 55 requests with 3 start cycles
  - PASS - Balanced capture of 89 requests with 3 start cycles
  20 tests executed, 14 tests passed, 6 tests skipped and 0 tests failed

Example fail run on IPU3:

  - LIBCAMERA_LOG_LEVELS="*:ERROR" lc-compliance -c "\_SB_.PCI0.I2C2.CAM0"
  - [0:31:36.992763102] [6420] ERROR V4L2 v4l2_device.cpp:191 'ov13858 8-0010': Control 0x009a0922 not found
  - [0:31:36.992815436] [6420] ERROR V4L2 v4l2_subdevice.cpp:285 'ov13858 8-0010': Unable to get rectangle 2 on pad 0: Inappropriate ioctl for device
  - [0:31:36.992847049] [6420] ERROR V4L2 v4l2_subdevice.cpp:285 'ov13858 8-0010': Unable to get rectangle 1 on pad 0: Inappropriate ioctl for device
  - [0:31:36.992869029] [6420] ERROR V4L2 v4l2_subdevice.cpp:285 'ov13858 8-0010': Unable to get rectangle 0 on pad 0: Inappropriate ioctl for device
  - [0:31:36.993152932] [6420] ERROR V4L2 v4l2_subdevice.cpp:285 'ov13858 8-0010': Unable to get rectangle 0 on pad 0: Inappropriate ioctl for device
  - [0:31:36.993172833] [6420] ERROR CameraSensor camera_sensor.cpp:678 'ov13858 8-0010': The analogue crop rectangle has been defaulted to the active area size
  - [0:31:36.993208149] [6420] ERROR V4L2 v4l2_subdevice.cpp:285 'ov13858 8-0010': Unable to get rectangle 0 on pad 0: Inappropriate ioctl for device
  - [0:31:36.993224502] [6420] ERROR CameraSensor camera_sensor.cpp:678 'ov13858 8-0010': The analogue crop rectangle has been defaulted to the active area size
  - [0:31:36.993354770] [6420] ERROR V4L2 v4l2_device.cpp:191 'ov5670 10-0036': Control 0x009a0922 not found
  - [0:31:36.993377622] [6420] ERROR V4L2 v4l2_subdevice.cpp:285 'ov5670 10-0036': Unable to get rectangle 2 on pad 0: Inappropriate ioctl for device
  - [0:31:36.993398093] [6420] ERROR V4L2 v4l2_subdevice.cpp:285 'ov5670 10-0036': Unable to get rectangle 1 on pad 0: Inappropriate ioctl for device
  - [0:31:36.993415611] [6420] ERROR V4L2 v4l2_subdevice.cpp:285 'ov5670 10-0036': Unable to get rectangle 0 on pad 0: Inappropriate ioctl for device
  - [0:31:36.993660192] [6420] ERROR V4L2 v4l2_subdevice.cpp:285 'ov5670 10-0036': Unable to get rectangle 0 on pad 0: Inappropriate ioctl for device
  - [0:31:36.993678492] [6420] ERROR CameraSensor camera_sensor.cpp:678 'ov5670 10-0036': The analogue crop rectangle has been defaulted to the active area size
  - [0:31:36.993724648] [6420] ERROR V4L2 v4l2_subdevice.cpp:285 'ov5670 10-0036': Unable to get rectangle 0 on pad 0: Inappropriate ioctl for device
  - [0:31:36.993741032] [6420] ERROR CameraSensor camera_sensor.cpp:678 'ov5670 10-0036': The analogue crop rectangle has been defaulted to the active area size
  - Using camera \_SB_.PCI0.I2C2.CAM0
  - Test single capture cycles
  - - SKIP - Camera needs 4 requests, can't test only 1
  - - SKIP - Camera needs 4 requests, can't test only 2
  - - SKIP - Camera needs 4 requests, can't test only 3
  - - PASS - Balanced capture of 5 requests with 1 start cycles
  - - PASS - Balanced capture of 8 requests with 1 start cycles
  - - PASS - Balanced capture of 13 requests with 1 start cycles
  - - PASS - Balanced capture of 21 requests with 1 start cycles
  - - PASS - Balanced capture of 34 requests with 1 start cycles
  - [0:31:41.969783243] [6420] ERROR IPU3 cio2.cpp:264 CIO2 buffer underrun
  <Application lockup here as the pipeline error is not propagated to the application>

Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
---
Hi,

I have tested this on RkISP1, RPi and IPU3 on latest master [1]. I plan
to post separate patches which starts to address some of the problems
found while working. A fix for 'cam --captur=N' is coming shortly for
example.

I still have to find a good fix for a races found in the
IPU3 pipeline between the CIO2 and IMGU (as showed above). What I don't
(yet) have a plan for is how to fix that request queueing errors are not
propagated in our application facing API leading the test application to
wait forever to a request the library knows have failed, ideas welcome.

1. 958c80a4f1c28301 ("android: camera_device: Set AE precapture trigger according to request")
---
 src/lc-compliance/main.cpp          | 139 ++++++++++++++++++
 src/lc-compliance/meson.build       |  24 ++++
 src/lc-compliance/results.cpp       |  75 ++++++++++
 src/lc-compliance/results.h         |  45 ++++++
 src/lc-compliance/single_stream.cpp | 210 ++++++++++++++++++++++++++++
 src/lc-compliance/tests.h           |  16 +++
 src/meson.build                     |   2 +
 7 files changed, 511 insertions(+)
 create mode 100644 src/lc-compliance/main.cpp
 create mode 100644 src/lc-compliance/meson.build
 create mode 100644 src/lc-compliance/results.cpp
 create mode 100644 src/lc-compliance/results.h
 create mode 100644 src/lc-compliance/single_stream.cpp
 create mode 100644 src/lc-compliance/tests.h

Comments

Naushir Patuck Jan. 29, 2021, 6:05 p.m. UTC | #1
Hi Niklas,

Thank you for your work, this looks quite interesting.  However, I have a
high level question, see below.

On Fri, 29 Jan 2021 at 16:53, Niklas Söderlund <
niklas.soderlund@ragnatech.se> wrote:

> Add a compliance tool to ease testing of cameras on target. In contrast
> to the unit-tests under test/ that aims to test the internal components
> of libcamera the compliance aims to test application use-cases and to
> some extend the public API.
>
> This change adds the boilerplate code for a simple framework to write
> tests in as well as two simple test. The tests aims both to demonstrate
> the tool and to catch real problems. The tests added are:
>
>  - Test that if one queues exactly N requests to a camera exactly N
>    requests are eventually completed.
>
>  - Test that a configured camera can be started and stopped multiple
>    times in an attempt to exercise cleanup code paths otherwise not
>    often tested with 'cam' for example.
>
> Example pass run on Raspberry Pi:
>
>   $ LIBCAMERA_LOG_LEVELS="*:ERROR" lc-compliance -c
> "/base/soc/i2c0mux/i2c@1/imx219@10"
>   [2:36:17.672447527] [11896] ERROR V4L2 v4l2_device.cpp:191 'imx219
> 10-0010': Control 0x009a0922 not found
>   [2:36:17.673095289] [11896] ERROR V4L2 v4l2_subdevice.cpp:285 'imx219
> 10-0010': Unable to get rectangle 2 on pad 0: Invalid argument
>   Using camera /base/soc/i2c0mux/i2c@1/imx219@10
>   Test single capture cycles
>   - SKIP - Camera needs 4 requests, can't test only 1
>   - SKIP - Camera needs 4 requests, can't test only 2
>   - SKIP - Camera needs 4 requests, can't test only 3
>

I'm a bit curious about the above 3 lines.  From what I make out, it is
saying that the pipeline cannot run with < 4 on-the-go requests, is that
correct?  Does that determination come from the buffer count returned by
PipelineHandler::GenerateConfiguration()?  I *think* the Raspberry Pi stack
should be able to handle any number of on-the-go requests.  I say think,
because I do not normally run in that configuration, but I do know some of
our users might have.  The buffer count of 4 returned
by PipelineHandlerRPi::generateConfiguration() is a somewhat educated guess
for a reasonable number of buffers.  Is this something we need to update in
our pipeline handler for this to work?

Regards,
Naush


>   - PASS - Balanced capture of 5 requests with 1 start cycles
>   - PASS - Balanced capture of 8 requests with 1 start cycles
>   - PASS - Balanced capture of 13 requests with 1 start cycles
>   - PASS - Balanced capture of 21 requests with 1 start cycles
>   - PASS - Balanced capture of 34 requests with 1 start cycles
>   - PASS - Balanced capture of 55 requests with 1 start cycles
>   - PASS - Balanced capture of 89 requests with 1 start cycles
>   Test multiple start/stop cycles
>   - SKIP - Camera needs 4 requests, can't test only 1
>   - SKIP - Camera needs 4 requests, can't test only 2
>   - SKIP - Camera needs 4 requests, can't test only 3
>   - PASS - Balanced capture of 5 requests with 3 start cycles
>   - PASS - Balanced capture of 8 requests with 3 start cycles
>   - PASS - Balanced capture of 13 requests with 3 start cycles
>   - PASS - Balanced capture of 21 requests with 3 start cycles
>   - PASS - Balanced capture of 34 requests with 3 start cycles
>   - PASS - Balanced capture of 55 requests with 3 start cycles
>   - PASS - Balanced capture of 89 requests with 3 start cycles
>   20 tests executed, 14 tests passed, 6 tests skipped and 0 tests failed
>
> Example fail run on IPU3:
>
>   - LIBCAMERA_LOG_LEVELS="*:ERROR" lc-compliance -c "\_SB_.PCI0.I2C2.CAM0"
>   - [0:31:36.992763102] [6420] ERROR V4L2 v4l2_device.cpp:191 'ov13858
> 8-0010': Control 0x009a0922 not found
>   - [0:31:36.992815436] [6420] ERROR V4L2 v4l2_subdevice.cpp:285 'ov13858
> 8-0010': Unable to get rectangle 2 on pad 0: Inappropriate ioctl for device
>   - [0:31:36.992847049] [6420] ERROR V4L2 v4l2_subdevice.cpp:285 'ov13858
> 8-0010': Unable to get rectangle 1 on pad 0: Inappropriate ioctl for device
>   - [0:31:36.992869029] [6420] ERROR V4L2 v4l2_subdevice.cpp:285 'ov13858
> 8-0010': Unable to get rectangle 0 on pad 0: Inappropriate ioctl for device
>   - [0:31:36.993152932] [6420] ERROR V4L2 v4l2_subdevice.cpp:285 'ov13858
> 8-0010': Unable to get rectangle 0 on pad 0: Inappropriate ioctl for device
>   - [0:31:36.993172833] [6420] ERROR CameraSensor camera_sensor.cpp:678
> 'ov13858 8-0010': The analogue crop rectangle has been defaulted to the
> active area size
>   - [0:31:36.993208149] [6420] ERROR V4L2 v4l2_subdevice.cpp:285 'ov13858
> 8-0010': Unable to get rectangle 0 on pad 0: Inappropriate ioctl for device
>   - [0:31:36.993224502] [6420] ERROR CameraSensor camera_sensor.cpp:678
> 'ov13858 8-0010': The analogue crop rectangle has been defaulted to the
> active area size
>   - [0:31:36.993354770] [6420] ERROR V4L2 v4l2_device.cpp:191 'ov5670
> 10-0036': Control 0x009a0922 not found
>   - [0:31:36.993377622] [6420] ERROR V4L2 v4l2_subdevice.cpp:285 'ov5670
> 10-0036': Unable to get rectangle 2 on pad 0: Inappropriate ioctl for device
>   - [0:31:36.993398093] [6420] ERROR V4L2 v4l2_subdevice.cpp:285 'ov5670
> 10-0036': Unable to get rectangle 1 on pad 0: Inappropriate ioctl for device
>   - [0:31:36.993415611] [6420] ERROR V4L2 v4l2_subdevice.cpp:285 'ov5670
> 10-0036': Unable to get rectangle 0 on pad 0: Inappropriate ioctl for device
>   - [0:31:36.993660192] [6420] ERROR V4L2 v4l2_subdevice.cpp:285 'ov5670
> 10-0036': Unable to get rectangle 0 on pad 0: Inappropriate ioctl for device
>   - [0:31:36.993678492] [6420] ERROR CameraSensor camera_sensor.cpp:678
> 'ov5670 10-0036': The analogue crop rectangle has been defaulted to the
> active area size
>   - [0:31:36.993724648] [6420] ERROR V4L2 v4l2_subdevice.cpp:285 'ov5670
> 10-0036': Unable to get rectangle 0 on pad 0: Inappropriate ioctl for device
>   - [0:31:36.993741032] [6420] ERROR CameraSensor camera_sensor.cpp:678
> 'ov5670 10-0036': The analogue crop rectangle has been defaulted to the
> active area size
>   - Using camera \_SB_.PCI0.I2C2.CAM0
>   - Test single capture cycles
>   - - SKIP - Camera needs 4 requests, can't test only 1
>   - - SKIP - Camera needs 4 requests, can't test only 2
>   - - SKIP - Camera needs 4 requests, can't test only 3
>   - - PASS - Balanced capture of 5 requests with 1 start cycles
>   - - PASS - Balanced capture of 8 requests with 1 start cycles
>   - - PASS - Balanced capture of 13 requests with 1 start cycles
>   - - PASS - Balanced capture of 21 requests with 1 start cycles
>   - - PASS - Balanced capture of 34 requests with 1 start cycles
>   - [0:31:41.969783243] [6420] ERROR IPU3 cio2.cpp:264 CIO2 buffer underrun
>   <Application lockup here as the pipeline error is not propagated to the
> application>
>
> Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
> ---
> Hi,
>
> I have tested this on RkISP1, RPi and IPU3 on latest master [1]. I plan
> to post separate patches which starts to address some of the problems
> found while working. A fix for 'cam --captur=N' is coming shortly for
> example.
>
> I still have to find a good fix for a races found in the
> IPU3 pipeline between the CIO2 and IMGU (as showed above). What I don't
> (yet) have a plan for is how to fix that request queueing errors are not
> propagated in our application facing API leading the test application to
> wait forever to a request the library knows have failed, ideas welcome.
>
> 1. 958c80a4f1c28301 ("android: camera_device: Set AE precapture trigger
> according to request")
> ---
>  src/lc-compliance/main.cpp          | 139 ++++++++++++++++++
>  src/lc-compliance/meson.build       |  24 ++++
>  src/lc-compliance/results.cpp       |  75 ++++++++++
>  src/lc-compliance/results.h         |  45 ++++++
>  src/lc-compliance/single_stream.cpp | 210 ++++++++++++++++++++++++++++
>  src/lc-compliance/tests.h           |  16 +++
>  src/meson.build                     |   2 +
>  7 files changed, 511 insertions(+)
>  create mode 100644 src/lc-compliance/main.cpp
>  create mode 100644 src/lc-compliance/meson.build
>  create mode 100644 src/lc-compliance/results.cpp
>  create mode 100644 src/lc-compliance/results.h
>  create mode 100644 src/lc-compliance/single_stream.cpp
>  create mode 100644 src/lc-compliance/tests.h
>
> diff --git a/src/lc-compliance/main.cpp b/src/lc-compliance/main.cpp
> new file mode 100644
> index 0000000000000000..e1cbce7eac3df2bc
> --- /dev/null
> +++ b/src/lc-compliance/main.cpp
> @@ -0,0 +1,139 @@
> +/* SPDX-License-Identifier: GPL-2.0-or-later */
> +/*
> + * Copyright (C) 2020, Google Inc.
> + *
> + * main.cpp - lc-compliance - The libcamera compliance tool
> + */
> +
> +#include <iomanip>
> +#include <iostream>
> +#include <string.h>
> +
> +#include <libcamera/libcamera.h>
> +
> +#include "../cam/options.h"
> +#include "tests.h"
> +
> +using namespace libcamera;
> +
> +class Harness
> +{
> +public:
> +       Harness();
> +       ~Harness();
> +
> +       int exec(int argc, char **argv);
> +
> +private:
> +       enum {
> +               OptCamera = 'c',
> +               OptHelp = 'h',
> +       };
> +
> +       int parseOptions(int argc, char **argv);
> +       int init(int argc, char **argv);
> +
> +       OptionsParser::Options options_;
> +       std::unique_ptr<CameraManager> cm_;
> +       std::shared_ptr<Camera> camera_;
> +};
> +
> +Harness::Harness()
> +{
> +       cm_ = std::make_unique<CameraManager>();
> +}
> +
> +Harness::~Harness()
> +{
> +       if (camera_) {
> +               camera_->release();
> +               camera_.reset();
> +       }
> +
> +       cm_->stop();
> +}
> +
> +int Harness::exec(int argc, char **argv)
> +{
> +       int ret = init(argc, argv);
> +       if (ret)
> +               return ret;
> +
> +       std::vector<Results> results;
> +
> +       results.push_back(testSingleStream(camera_));
> +
> +       for (const Results &result : results) {
> +               ret = result.summary();
> +               if (ret)
> +                       return ret;
> +       }
> +
> +       return 0;
> +}
> +
> +int Harness::init(int argc, char **argv)
> +{
> +       int ret = parseOptions(argc, argv);
> +       if (ret < 0)
> +               return ret;
> +
> +       ret = cm_->start();
> +       if (ret) {
> +               std::cout << "Failed to start camera manager: "
> +                         << strerror(-ret) << std::endl;
> +               return ret;
> +       }
> +
> +       if (!options_.isSet(OptCamera)) {
> +               std::cout << "No camera specified, available cameras:" <<
> std::endl;
> +               for (const std::shared_ptr<Camera> &cam : cm_->cameras())
> +                       std::cout << "- " << cam.get()->id() << std::endl;
> +               return -ENODEV;
> +       }
> +
> +       const std::string &cameraId = options_[OptCamera];
> +       camera_ = cm_->get(cameraId);
> +       if (!camera_) {
> +               std::cout << "Camera " << cameraId << " not found,
> available cameras:" << std::endl;
> +               for (const std::shared_ptr<Camera> &cam : cm_->cameras())
> +                       std::cout << "- " << cam.get()->id() << std::endl;
> +               return -ENODEV;
> +       }
> +
> +       if (camera_->acquire()) {
> +               std::cout << "Failed to acquire camera" << std::endl;
> +               return -EINVAL;
> +       }
> +
> +       std::cout << "Using camera " << cameraId << std::endl;
> +
> +       return 0;
> +}
> +
> +int Harness::parseOptions(int argc, char **argv)
> +{
> +       OptionsParser parser;
> +       parser.addOption(OptCamera, OptionString,
> +                        "Specify which camera to operate on, by id",
> "camera",
> +                        ArgumentRequired, "camera");
> +       parser.addOption(OptHelp, OptionNone, "Display this help message",
> +                        "help");
> +
> +       options_ = parser.parse(argc, argv);
> +       if (!options_.valid())
> +               return -EINVAL;
> +
> +       if (options_.empty() || options_.isSet(OptHelp)) {
> +               parser.usage();
> +               return options_.empty() ? -EINVAL : -EINTR;
> +       }
> +
> +       return 0;
> +}
> +
> +int main(int argc, char **argv)
> +{
> +       Harness harness;
> +       return harness.exec(argc, argv) ? EXIT_FAILURE : 0;
> +}
> diff --git a/src/lc-compliance/meson.build b/src/lc-compliance/meson.build
> new file mode 100644
> index 0000000000000000..d700a307c71405b4
> --- /dev/null
> +++ b/src/lc-compliance/meson.build
> @@ -0,0 +1,24 @@
> +# SPDX-License-Identifier: CC0-1.0
> +
> +libevent = dependency('libevent_pthreads', required : false)
> +
> +if not libevent.found()
> +    warning('libevent_pthreads not found, \'lc-compliance\' application
> will not be compiled')
> +    subdir_done()
> +endif
> +
> +lc_compliance_sources = files([
> +    '../cam/event_loop.cpp',
> +    '../cam/options.cpp',
> +    'main.cpp',
> +    'results.cpp',
> +    'single_stream.cpp',
> +])
> +
> +lc_compliance  = executable('lc-compliance', lc_compliance_sources,
> +                  dependencies : [
> +                      libatomic,
> +                      libcamera_dep,
> +                      libevent,
> +                  ],
> +                  install : true)
> diff --git a/src/lc-compliance/results.cpp b/src/lc-compliance/results.cpp
> new file mode 100644
> index 0000000000000000..fb4242bf49a3268b
> --- /dev/null
> +++ b/src/lc-compliance/results.cpp
> @@ -0,0 +1,75 @@
> +/* SPDX-License-Identifier: GPL-2.0-or-later */
> +/*
> + * Copyright (C) 2020, Google Inc.
> + *
> + * results.cpp - Test result aggregator
> + */
> +
> +#include "results.h"
> +
> +#include <iostream>
> +
> +void Results::add(const Result &result)
> +{
> +       if (result.first == Pass)
> +               passed_++;
> +       else if (result.first == Fail)
> +               failed_++;
> +       else if (result.first == Skip)
> +               skipped_++;
> +
> +       printResult(result);
> +}
> +
> +void Results::add(Status status, const std::string &message)
> +{
> +       add({ status, message });
> +}
> +
> +void Results::fail(const std::string &message)
> +{
> +       add(Fail, message);
> +}
> +
> +void Results::pass(const std::string &message)
> +{
> +       add(Pass, message);
> +}
> +
> +void Results::skip(const std::string &message)
> +{
> +       add(Skip, message);
> +}
> +
> +int Results::summary() const
> +{
> +       if (failed_ + passed_ + skipped_ != planned_) {
> +               std::cout << "Planned and executed numer of tests differ "
> +                         << failed_ + passed_ + skipped_ << " executed "
> +                         << planned_ << " planned" << std::endl;
> +
> +               return -EINVAL;
> +       }
> +
> +       std::cout << planned_ << " tests executed, "
> +                 << passed_ << " tests passed, "
> +                 << skipped_ << " tests skipped and "
> +                 << failed_ << " tests failed " << std::endl;
> +
> +       return 0;
> +}
> +
> +void Results::printResult(const Result &result)
> +{
> +       std::string prefix;
> +
> +       /* \todo Make parsable as TAP. */
> +       if (result.first == Pass)
> +               prefix = "PASS";
> +       else if (result.first == Fail)
> +               prefix = "FAIL";
> +       else if (result.first == Skip)
> +               prefix = "SKIP";
> +
> +       std::cout << "- " << prefix << " - " << result.second << std::endl;
> +}
> diff --git a/src/lc-compliance/results.h b/src/lc-compliance/results.h
> new file mode 100644
> index 0000000000000000..a02fd5ab46edd62c
> --- /dev/null
> +++ b/src/lc-compliance/results.h
> @@ -0,0 +1,45 @@
> +/* SPDX-License-Identifier: GPL-2.0-or-later */
> +/*
> + * Copyright (C) 2020, Google Inc.
> + *
> + * results.h - Test result aggregator
> + */
> +#ifndef __LC_COMPLIANCE_RESULTS_H__
> +#define __LC_COMPLIANCE_RESULTS_H__
> +
> +#include <string>
> +
> +class Results
> +{
> +public:
> +       enum Status {
> +               Fail,
> +               Pass,
> +               Skip,
> +       };
> +
> +       using Result = std::pair<Status, std::string>;
> +
> +       Results(unsigned int planned)
> +               : planned_(planned), passed_(0), failed_(0), skipped_(0)
> +       {
> +       }
> +
> +       void add(const Result &result);
> +       void add(Status status, const std::string &message);
> +       void fail(const std::string &message);
> +       void pass(const std::string &message);
> +       void skip(const std::string &message);
> +
> +       int summary() const;
> +
> +private:
> +       void printResult(const Result &result);
> +
> +       unsigned int planned_;
> +       unsigned int passed_;
> +       unsigned int failed_;
> +       unsigned int skipped_;
> +};
> +
> +#endif /* __LC_COMPLIANCE_RESULTS_H__ */
> diff --git a/src/lc-compliance/single_stream.cpp
> b/src/lc-compliance/single_stream.cpp
> new file mode 100644
> index 0000000000000000..d31b6f8d06487a85
> --- /dev/null
> +++ b/src/lc-compliance/single_stream.cpp
> @@ -0,0 +1,210 @@
> +/* SPDX-License-Identifier: GPL-2.0-or-later */
> +/*
> + * Copyright (C) 2020, Google Inc.
> + *
> + * single_stream.cpp - Test a single camera stream
> + */
> +
> +#include <iostream>
> +
> +#include "../cam/event_loop.h"
> +#include "tests.h"
> +
> +using namespace libcamera;
> +
> +class SimpleCapture
> +{
> +public:
> +       SimpleCapture(std::shared_ptr<Camera> camera)
> +               : camera_(camera),
> allocator_(std::make_unique<FrameBufferAllocator>(camera))
> +       {
> +       }
> +
> +       Results::Result configure(StreamRole role);
> +       Results::Result start();
> +       Results::Result capture(unsigned int numRequests);
> +       Results::Result stop();
> +
> +private:
> +       int queueRequest(Request *request);
> +       void requestComplete(Request *request);
> +
> +       std::shared_ptr<libcamera::Camera> camera_;
> +       std::unique_ptr<FrameBufferAllocator> allocator_;
> +       std::unique_ptr<libcamera::CameraConfiguration> config_;
> +
> +       EventLoop *loop_;
> +       unsigned int queueCount_;
> +       unsigned int captureCount_;
> +       unsigned int captureLimit_;
> +};
> +
> +Results::Result SimpleCapture::configure(StreamRole role)
> +{
> +       config_ = camera_->generateConfiguration({ role });
> +
> +       if (config_->validate() != CameraConfiguration::Valid) {
> +               config_.reset();
> +               return { Results::Fail, "Configuration not valid" };
> +       }
> +
> +       if (camera_->configure(config_.get())) {
> +               config_.reset();
> +               return { Results::Fail, "Failed to configure camera" };
> +       }
> +
> +       return { Results::Pass, "Configure camera" };
> +}
> +
> +Results::Result SimpleCapture::start()
> +{
> +       Stream *stream = config_->at(0).stream();
> +       if (allocator_->allocate(stream) < 0)
> +               return { Results::Fail, "Failed to allocate buffers
> camera" };
> +
> +       if (camera_->start())
> +               return { Results::Fail, "Failed to start camera" };
> +
> +       camera_->requestCompleted.connect(this,
> &SimpleCapture::requestComplete);
> +
> +       return { Results::Pass, "Started camera" };
> +}
> +
> +Results::Result SimpleCapture::capture(unsigned int numRequests)
> +{
> +       Stream *stream = config_->at(0).stream();
> +       const std::vector<std::unique_ptr<FrameBuffer>> &buffers =
> allocator_->buffers(stream);
> +
> +       /* No point in testing less requests then the camera depth. */
> +       if (buffers.size() > numRequests)
> +               return { Results::Skip, "Camera needs " +
> std::to_string(buffers.size()) + " requests, can't test only " +
> std::to_string(numRequests) };
> +
> +       queueCount_ = 0;
> +       captureCount_ = 0;
> +       captureLimit_ = numRequests;
> +
> +       /* Queue the camera recommended number of reqeuests. */
> +       std::vector<std::unique_ptr<libcamera::Request>> requests;
> +       for (const std::unique_ptr<FrameBuffer> &buffer :
> allocator_->buffers(stream)) {
> +               std::unique_ptr<Request> request =
> camera_->createRequest();
> +               if (!request)
> +                       return { Results::Fail, "Can't create request" };
> +
> +               if (request->addBuffer(stream, buffer.get()))
> +                       return { Results::Fail, "Can't set buffer for
> request" };
> +
> +               if (queueRequest(request.get()) < 0)
> +                       return { Results::Fail, "Failed to queue request"
> };
> +
> +               requests.push_back(std::move(request));
> +       }
> +
> +       /* Run capture session. */
> +       loop_ = new EventLoop();
> +       loop_->exec();
> +       delete loop_;
> +
> +       if (captureCount_ != captureLimit_)
> +               return { Results::Fail, "Got " +
> std::to_string(captureCount_) + " request, wanted " +
> std::to_string(captureLimit_) };
> +
> +       return { Results::Pass, "Balanced capture of " +
> std::to_string(numRequests) + " requests" };
> +}
> +
> +Results::Result SimpleCapture::stop()
> +{
> +       Stream *stream = config_->at(0).stream();
> +
> +       camera_->stop();
> +
> +       camera_->requestCompleted.disconnect(this,
> &SimpleCapture::requestComplete);
> +
> +       allocator_->free(stream);
> +
> +       return { Results::Pass, "Stopped camera" };
> +}
> +
> +int SimpleCapture::queueRequest(Request *request)
> +{
> +       queueCount_++;
> +       if (queueCount_ > captureLimit_)
> +               return 0;
> +
> +       return camera_->queueRequest(request);
> +}
> +
> +void SimpleCapture::requestComplete(Request *request)
> +{
> +       captureCount_++;
> +       if (captureCount_ >= captureLimit_) {
> +               loop_->exit(0);
> +               return;
> +       }
> +
> +       request->reuse(Request::ReuseBuffers);
> +       if (queueRequest(request))
> +               loop_->exit(-EINVAL);
> +}
> +
> +Results::Result testRequestBalance(std::shared_ptr<Camera> camera,
> +                                  unsigned int startCycles,
> +                                  unsigned int numRequests)
> +{
> +       SimpleCapture capture(camera);
> +       Results::Result ret;
> +
> +       ret = capture.configure(Viewfinder);
> +       if (ret.first != Results::Pass)
> +               return ret;
> +
> +       for (unsigned int starts = 0; starts < startCycles; starts++) {
> +               ret = capture.start();
> +               if (ret.first != Results::Pass)
> +                       return ret;
> +
> +               ret = capture.capture(numRequests);
> +               if (ret.first != Results::Pass) {
> +                       capture.stop();
> +                       return ret;
> +               }
> +
> +               ret = capture.stop();
> +               if (ret.first != Results::Pass)
> +                       return ret;
> +       }
> +
> +       return { Results::Pass, "Balanced capture of " +
> std::to_string(numRequests) + " requests with " +
> std::to_string(startCycles) + " start cycles" };
> +}
> +
> +Results testSingleStream(std::shared_ptr<Camera> camera)
> +{
> +       const std::vector<unsigned int> numRequests = { 1, 2, 3, 5, 8, 13,
> 21, 34, 55, 89 };
> +
> +       Results results(numRequests.size() * 2);
> +
> +       if (!camera)
> +               return results;
> +
> +       /*
> +        * Test single capture cycles
> +        *
> +        * Makes sure the camera completes the exact number of requests
> queued.
> +        * Example failure is a camera that needs N+M requests queued to
> +        * complete N requests to the application.
> +        */
> +       std::cout << "Test single capture cycles" << std::endl;
> +       for (unsigned int num : numRequests)
> +               results.add(testRequestBalance(camera, 1, num));
> +
> +       /*
> +        * Test multiple start/stop cycles
> +        *
> +        * Makes sure the camera supports multiple start/stop cycles.
> +        * Example failure is a camera that does not clean up correctly in
> its
> +        * error path but is only tested by single-capture applications.
> +        */
> +       std::cout << "Test multiple start/stop cycles" << std::endl;
> +       for (unsigned int num : numRequests)
> +               results.add(testRequestBalance(camera, 3, num));
> +
> +       return results;
> +}
> diff --git a/src/lc-compliance/tests.h b/src/lc-compliance/tests.h
> new file mode 100644
> index 0000000000000000..396605214e4b8980
> --- /dev/null
> +++ b/src/lc-compliance/tests.h
> @@ -0,0 +1,16 @@
> +/* SPDX-License-Identifier: GPL-2.0-or-later */
> +/*
> + * Copyright (C) 2020, Google Inc.
> + *
> + * tests.h - Test modules
> + */
> +#ifndef __LC_COMPLIANCE_TESTS_H__
> +#define __LC_COMPLIANCE_TESTS_H__
> +
> +#include <libcamera/libcamera.h>
> +
> +#include "results.h"
> +
> +Results testSingleStream(std::shared_ptr<libcamera::Camera> camera);
> +
> +#endif /* __LC_COMPLIANCE_TESTS_H__ */
> diff --git a/src/meson.build b/src/meson.build
> index 4b75f05878bcb702..a8e1af7adf2ca9c8 100644
> --- a/src/meson.build
> +++ b/src/meson.build
> @@ -18,6 +18,8 @@ subdir('android')
>  subdir('libcamera')
>  subdir('ipa')
>
> +subdir('lc-compliance')
> +
>  subdir('cam')
>  subdir('qcam')
>
> --
> 2.30.0
>
> _______________________________________________
> libcamera-devel mailing list
> libcamera-devel@lists.libcamera.org
> https://lists.libcamera.org/listinfo/libcamera-devel
>
Sebastian Fricke Jan. 29, 2021, 6:48 p.m. UTC | #2
Hey Niklas,

Nice I was eagerly waiting for this patch, thank you for the work.

Here is how it looks on my NanoPC-T4 (RkISP1)
https://paste.debian.net/1183263/

And below I have added some comments, I expect to play around with that
tool in the near future :).

On 29.01.2021 17:53, Niklas Söderlund wrote:
>Add a compliance tool to ease testing of cameras on target. In contrast

Could you clarify this sentence a little more? Which target do you
mean?

>to the unit-tests under test/ that aims to test the internal components
>of libcamera the compliance aims to test application use-cases and to

s/compliance/compliance tool/

>some extend the public API.
>
>This change adds the boilerplate code for a simple framework to write
>tests in as well as two simple test. The tests aims both to demonstrate

Maybe this sounds better?
s/adds the boilerplate code for a simple framework to write tests in/
   adds the boilerplate code of a simple framework for the creation of
   tests/

s/The tests aims/The tests aim/

>the tool and to catch real problems. The tests added are:
>
> - Test that if one queues exactly N requests to a camera exactly N
>   requests are eventually completed.
>
> - Test that a configured camera can be started and stopped multiple
>   times in an attempt to exercise cleanup code paths otherwise not
>   often tested with 'cam' for example.
>
>Example pass run on Raspberry Pi:
>
>  $ LIBCAMERA_LOG_LEVELS="*:ERROR" lc-compliance -c "/base/soc/i2c0mux/i2c@1/imx219@10"
>  [2:36:17.672447527] [11896] ERROR V4L2 v4l2_device.cpp:191 'imx219 10-0010': Control 0x009a0922 not found
>  [2:36:17.673095289] [11896] ERROR V4L2 v4l2_subdevice.cpp:285 'imx219 10-0010': Unable to get rectangle 2 on pad 0: Invalid argument
>  Using camera /base/soc/i2c0mux/i2c@1/imx219@10
>  Test single capture cycles
>  - SKIP - Camera needs 4 requests, can't test only 1
>  - SKIP - Camera needs 4 requests, can't test only 2
>  - SKIP - Camera needs 4 requests, can't test only 3
>  - PASS - Balanced capture of 5 requests with 1 start cycles
>  - PASS - Balanced capture of 8 requests with 1 start cycles
>  - PASS - Balanced capture of 13 requests with 1 start cycles
>  - PASS - Balanced capture of 21 requests with 1 start cycles
>  - PASS - Balanced capture of 34 requests with 1 start cycles
>  - PASS - Balanced capture of 55 requests with 1 start cycles
>  - PASS - Balanced capture of 89 requests with 1 start cycles
>  Test multiple start/stop cycles
>  - SKIP - Camera needs 4 requests, can't test only 1
>  - SKIP - Camera needs 4 requests, can't test only 2
>  - SKIP - Camera needs 4 requests, can't test only 3
>  - PASS - Balanced capture of 5 requests with 3 start cycles
>  - PASS - Balanced capture of 8 requests with 3 start cycles
>  - PASS - Balanced capture of 13 requests with 3 start cycles
>  - PASS - Balanced capture of 21 requests with 3 start cycles
>  - PASS - Balanced capture of 34 requests with 3 start cycles
>  - PASS - Balanced capture of 55 requests with 3 start cycles
>  - PASS - Balanced capture of 89 requests with 3 start cycles
>  20 tests executed, 14 tests passed, 6 tests skipped and 0 tests failed
>
>Example fail run on IPU3:
>
>  - LIBCAMERA_LOG_LEVELS="*:ERROR" lc-compliance -c "\_SB_.PCI0.I2C2.CAM0"
>  - [0:31:36.992763102] [6420] ERROR V4L2 v4l2_device.cpp:191 'ov13858 8-0010': Control 0x009a0922 not found
>  - [0:31:36.992815436] [6420] ERROR V4L2 v4l2_subdevice.cpp:285 'ov13858 8-0010': Unable to get rectangle 2 on pad 0: Inappropriate ioctl for device
>  - [0:31:36.992847049] [6420] ERROR V4L2 v4l2_subdevice.cpp:285 'ov13858 8-0010': Unable to get rectangle 1 on pad 0: Inappropriate ioctl for device
>  - [0:31:36.992869029] [6420] ERROR V4L2 v4l2_subdevice.cpp:285 'ov13858 8-0010': Unable to get rectangle 0 on pad 0: Inappropriate ioctl for device
>  - [0:31:36.993152932] [6420] ERROR V4L2 v4l2_subdevice.cpp:285 'ov13858 8-0010': Unable to get rectangle 0 on pad 0: Inappropriate ioctl for device
>  - [0:31:36.993172833] [6420] ERROR CameraSensor camera_sensor.cpp:678 'ov13858 8-0010': The analogue crop rectangle has been defaulted to the active area size
>  - [0:31:36.993208149] [6420] ERROR V4L2 v4l2_subdevice.cpp:285 'ov13858 8-0010': Unable to get rectangle 0 on pad 0: Inappropriate ioctl for device
>  - [0:31:36.993224502] [6420] ERROR CameraSensor camera_sensor.cpp:678 'ov13858 8-0010': The analogue crop rectangle has been defaulted to the active area size
>  - [0:31:36.993354770] [6420] ERROR V4L2 v4l2_device.cpp:191 'ov5670 10-0036': Control 0x009a0922 not found
>  - [0:31:36.993377622] [6420] ERROR V4L2 v4l2_subdevice.cpp:285 'ov5670 10-0036': Unable to get rectangle 2 on pad 0: Inappropriate ioctl for device
>  - [0:31:36.993398093] [6420] ERROR V4L2 v4l2_subdevice.cpp:285 'ov5670 10-0036': Unable to get rectangle 1 on pad 0: Inappropriate ioctl for device
>  - [0:31:36.993415611] [6420] ERROR V4L2 v4l2_subdevice.cpp:285 'ov5670 10-0036': Unable to get rectangle 0 on pad 0: Inappropriate ioctl for device
>  - [0:31:36.993660192] [6420] ERROR V4L2 v4l2_subdevice.cpp:285 'ov5670 10-0036': Unable to get rectangle 0 on pad 0: Inappropriate ioctl for device
>  - [0:31:36.993678492] [6420] ERROR CameraSensor camera_sensor.cpp:678 'ov5670 10-0036': The analogue crop rectangle has been defaulted to the active area size
>  - [0:31:36.993724648] [6420] ERROR V4L2 v4l2_subdevice.cpp:285 'ov5670 10-0036': Unable to get rectangle 0 on pad 0: Inappropriate ioctl for device
>  - [0:31:36.993741032] [6420] ERROR CameraSensor camera_sensor.cpp:678 'ov5670 10-0036': The analogue crop rectangle has been defaulted to the active area size
>  - Using camera \_SB_.PCI0.I2C2.CAM0
>  - Test single capture cycles
>  - - SKIP - Camera needs 4 requests, can't test only 1
>  - - SKIP - Camera needs 4 requests, can't test only 2
>  - - SKIP - Camera needs 4 requests, can't test only 3
>  - - PASS - Balanced capture of 5 requests with 1 start cycles
>  - - PASS - Balanced capture of 8 requests with 1 start cycles
>  - - PASS - Balanced capture of 13 requests with 1 start cycles
>  - - PASS - Balanced capture of 21 requests with 1 start cycles
>  - - PASS - Balanced capture of 34 requests with 1 start cycles
>  - [0:31:41.969783243] [6420] ERROR IPU3 cio2.cpp:264 CIO2 buffer underrun
>  <Application lockup here as the pipeline error is not propagated to the application>
>
>Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
>---
>Hi,
>
>I have tested this on RkISP1, RPi and IPU3 on latest master [1]. I plan
>to post separate patches which starts to address some of the problems
>found while working. A fix for 'cam --captur=N' is coming shortly for
>example.
>
>I still have to find a good fix for a races found in the
>IPU3 pipeline between the CIO2 and IMGU (as showed above). What I don't
>(yet) have a plan for is how to fix that request queueing errors are not
>propagated in our application facing API leading the test application to
>wait forever to a request the library knows have failed, ideas welcome.
>
>1. 958c80a4f1c28301 ("android: camera_device: Set AE precapture trigger according to request")
>---
> src/lc-compliance/main.cpp          | 139 ++++++++++++++++++
> src/lc-compliance/meson.build       |  24 ++++
> src/lc-compliance/results.cpp       |  75 ++++++++++
> src/lc-compliance/results.h         |  45 ++++++
> src/lc-compliance/single_stream.cpp | 210 ++++++++++++++++++++++++++++
> src/lc-compliance/tests.h           |  16 +++
> src/meson.build                     |   2 +
> 7 files changed, 511 insertions(+)
> create mode 100644 src/lc-compliance/main.cpp
> create mode 100644 src/lc-compliance/meson.build
> create mode 100644 src/lc-compliance/results.cpp
> create mode 100644 src/lc-compliance/results.h
> create mode 100644 src/lc-compliance/single_stream.cpp
> create mode 100644 src/lc-compliance/tests.h
>
>diff --git a/src/lc-compliance/main.cpp b/src/lc-compliance/main.cpp
>new file mode 100644
>index 0000000000000000..e1cbce7eac3df2bc
>--- /dev/null
>+++ b/src/lc-compliance/main.cpp
>@@ -0,0 +1,139 @@
>+/* SPDX-License-Identifier: GPL-2.0-or-later */
>+/*
>+ * Copyright (C) 2020, Google Inc.
>+ *
>+ * main.cpp - lc-compliance - The libcamera compliance tool
>+ */
>+
>+#include <iomanip>
>+#include <iostream>
>+#include <string.h>
>+
>+#include <libcamera/libcamera.h>
>+
>+#include "../cam/options.h"
>+#include "tests.h"
>+
>+using namespace libcamera;
>+
>+class Harness
>+{
>+public:
>+	Harness();
>+	~Harness();
>+
>+	int exec(int argc, char **argv);
>+
>+private:
>+	enum {
>+		OptCamera = 'c',
>+		OptHelp = 'h',
>+	};
>+
>+	int parseOptions(int argc, char **argv);
>+	int init(int argc, char **argv);
>+
>+	OptionsParser::Options options_;
>+	std::unique_ptr<CameraManager> cm_;
>+	std::shared_ptr<Camera> camera_;
>+};
>+
>+Harness::Harness()
>+{
>+	cm_ = std::make_unique<CameraManager>();
>+}
>+
>+Harness::~Harness()
>+{
>+	if (camera_) {
>+		camera_->release();
>+		camera_.reset();
>+	}
>+
>+	cm_->stop();
>+}
>+
>+int Harness::exec(int argc, char **argv)
>+{
>+	int ret = init(argc, argv);
>+	if (ret)
>+		return ret;
>+
>+	std::vector<Results> results;
>+
>+	results.push_back(testSingleStream(camera_));
>+
>+	for (const Results &result : results) {
>+		ret = result.summary();
>+		if (ret)
>+			return ret;
>+	}
>+
>+	return 0;
>+}
>+
>+int Harness::init(int argc, char **argv)
>+{
>+	int ret = parseOptions(argc, argv);
>+	if (ret < 0)
>+		return ret;
>+
>+	ret = cm_->start();
>+	if (ret) {
>+		std::cout << "Failed to start camera manager: "
>+			  << strerror(-ret) << std::endl;
>+		return ret;
>+	}
>+
>+	if (!options_.isSet(OptCamera)) {
>+		std::cout << "No camera specified, available cameras:" << std::endl;
>+		for (const std::shared_ptr<Camera> &cam : cm_->cameras())
>+			std::cout << "- " << cam.get()->id() << std::endl;
>+		return -ENODEV;
>+	}
>+
>+	const std::string &cameraId = options_[OptCamera];
>+	camera_ = cm_->get(cameraId);
>+	if (!camera_) {
>+		std::cout << "Camera " << cameraId << " not found, available cameras:" << std::endl;
>+		for (const std::shared_ptr<Camera> &cam : cm_->cameras())
>+			std::cout << "- " << cam.get()->id() << std::endl;
>+		return -ENODEV;
>+	}
>+
>+	if (camera_->acquire()) {
>+		std::cout << "Failed to acquire camera" << std::endl;
>+		return -EINVAL;
>+	}
>+
>+	std::cout << "Using camera " << cameraId << std::endl;
>+
>+	return 0;
>+}
>+
>+int Harness::parseOptions(int argc, char **argv)
>+{
>+	OptionsParser parser;
>+	parser.addOption(OptCamera, OptionString,
>+			 "Specify which camera to operate on, by id", "camera",
>+			 ArgumentRequired, "camera");
>+	parser.addOption(OptHelp, OptionNone, "Display this help message",
>+			 "help");
>+
>+	options_ = parser.parse(argc, argv);
>+	if (!options_.valid())
>+		return -EINVAL;
>+
>+	if (options_.empty() || options_.isSet(OptHelp)) {
>+		parser.usage();
>+		return options_.empty() ? -EINVAL : -EINTR;
>+	}
>+
>+	return 0;
>+}
>+
>+int main(int argc, char **argv)
>+{
>+	Harness harness;
>+	return harness.exec(argc, argv) ? EXIT_FAILURE : 0;
>+}
>diff --git a/src/lc-compliance/meson.build b/src/lc-compliance/meson.build
>new file mode 100644
>index 0000000000000000..d700a307c71405b4
>--- /dev/null
>+++ b/src/lc-compliance/meson.build
>@@ -0,0 +1,24 @@
>+# SPDX-License-Identifier: CC0-1.0
>+
>+libevent = dependency('libevent_pthreads', required : false)
>+
>+if not libevent.found()
>+    warning('libevent_pthreads not found, \'lc-compliance\' application will not be compiled')
>+    subdir_done()
>+endif
>+
>+lc_compliance_sources = files([
>+    '../cam/event_loop.cpp',
>+    '../cam/options.cpp',
>+    'main.cpp',
>+    'results.cpp',
>+    'single_stream.cpp',
>+])
>+
>+lc_compliance  = executable('lc-compliance', lc_compliance_sources,
>+                  dependencies : [
>+                      libatomic,
>+                      libcamera_dep,
>+                      libevent,
>+                  ],
>+                  install : true)
>diff --git a/src/lc-compliance/results.cpp b/src/lc-compliance/results.cpp
>new file mode 100644
>index 0000000000000000..fb4242bf49a3268b
>--- /dev/null
>+++ b/src/lc-compliance/results.cpp
>@@ -0,0 +1,75 @@
>+/* SPDX-License-Identifier: GPL-2.0-or-later */
>+/*
>+ * Copyright (C) 2020, Google Inc.
>+ *
>+ * results.cpp - Test result aggregator
>+ */
>+
>+#include "results.h"
>+
>+#include <iostream>
>+
>+void Results::add(const Result &result)
>+{
>+	if (result.first == Pass)
>+		passed_++;
>+	else if (result.first == Fail)
>+		failed_++;
>+	else if (result.first == Skip)
>+		skipped_++;
>+
>+	printResult(result);
>+}
>+
>+void Results::add(Status status, const std::string &message)
>+{
>+	add({ status, message });
>+}
>+
>+void Results::fail(const std::string &message)
>+{
>+	add(Fail, message);
>+}
>+
>+void Results::pass(const std::string &message)
>+{
>+	add(Pass, message);
>+}
>+
>+void Results::skip(const std::string &message)
>+{
>+	add(Skip, message);
>+}
>+
>+int Results::summary() const
>+{
>+	if (failed_ + passed_ + skipped_ != planned_) {
>+		std::cout << "Planned and executed numer of tests differ "

s/numer/number/

>+			  << failed_ + passed_ + skipped_ << " executed "
>+			  << planned_ << " planned" << std::endl;
>+
>+		return -EINVAL;
>+	}
>+
>+	std::cout << planned_ << " tests executed, "
>+		  << passed_ << " tests passed, "
>+		  << skipped_ << " tests skipped and "
>+		  << failed_ << " tests failed " << std::endl;
>+
>+	return 0;
>+}
>+
>+void Results::printResult(const Result &result)
>+{
>+	std::string prefix;
>+
>+	/* \todo Make parsable as TAP. */

What do you mean with TAP?

>+	if (result.first == Pass)
>+		prefix = "PASS";
>+	else if (result.first == Fail)
>+		prefix = "FAIL";
>+	else if (result.first == Skip)
>+		prefix = "SKIP";
>+
>+	std::cout << "- " << prefix << " - " << result.second << std::endl;
>+}
>diff --git a/src/lc-compliance/results.h b/src/lc-compliance/results.h
>new file mode 100644
>index 0000000000000000..a02fd5ab46edd62c
>--- /dev/null
>+++ b/src/lc-compliance/results.h
>@@ -0,0 +1,45 @@
>+/* SPDX-License-Identifier: GPL-2.0-or-later */
>+/*
>+ * Copyright (C) 2020, Google Inc.
>+ *
>+ * results.h - Test result aggregator
>+ */
>+#ifndef __LC_COMPLIANCE_RESULTS_H__
>+#define __LC_COMPLIANCE_RESULTS_H__
>+
>+#include <string>
>+
>+class Results
>+{
>+public:
>+	enum Status {
>+		Fail,
>+		Pass,
>+		Skip,
>+	};
>+
>+	using Result = std::pair<Status, std::string>;
>+
>+	Results(unsigned int planned)
>+		: planned_(planned), passed_(0), failed_(0), skipped_(0)
>+	{
>+	}
>+
>+	void add(const Result &result);
>+	void add(Status status, const std::string &message);
>+	void fail(const std::string &message);
>+	void pass(const std::string &message);
>+	void skip(const std::string &message);
>+
>+	int summary() const;
>+
>+private:
>+	void printResult(const Result &result);
>+
>+	unsigned int planned_;
>+	unsigned int passed_;
>+	unsigned int failed_;
>+	unsigned int skipped_;
>+};
>+
>+#endif /* __LC_COMPLIANCE_RESULTS_H__ */
>diff --git a/src/lc-compliance/single_stream.cpp b/src/lc-compliance/single_stream.cpp
>new file mode 100644
>index 0000000000000000..d31b6f8d06487a85
>--- /dev/null
>+++ b/src/lc-compliance/single_stream.cpp
>@@ -0,0 +1,210 @@
>+/* SPDX-License-Identifier: GPL-2.0-or-later */
>+/*
>+ * Copyright (C) 2020, Google Inc.
>+ *
>+ * single_stream.cpp - Test a single camera stream
>+ */
>+
>+#include <iostream>
>+
>+#include "../cam/event_loop.h"
>+#include "tests.h"
>+
>+using namespace libcamera;
>+
>+class SimpleCapture
>+{
>+public:
>+	SimpleCapture(std::shared_ptr<Camera> camera)
>+		: camera_(camera), allocator_(std::make_unique<FrameBufferAllocator>(camera))
>+	{
>+	}
>+
>+	Results::Result configure(StreamRole role);
>+	Results::Result start();
>+	Results::Result capture(unsigned int numRequests);
>+	Results::Result stop();
>+
>+private:
>+	int queueRequest(Request *request);
>+	void requestComplete(Request *request);
>+
>+	std::shared_ptr<libcamera::Camera> camera_;
>+	std::unique_ptr<FrameBufferAllocator> allocator_;
>+	std::unique_ptr<libcamera::CameraConfiguration> config_;
>+
>+	EventLoop *loop_;
>+	unsigned int queueCount_;
>+	unsigned int captureCount_;
>+	unsigned int captureLimit_;
>+};
>+
>+Results::Result SimpleCapture::configure(StreamRole role)
>+{
>+	config_ = camera_->generateConfiguration({ role });
>+
>+	if (config_->validate() != CameraConfiguration::Valid) {
>+		config_.reset();
>+		return { Results::Fail, "Configuration not valid" };
>+	}
>+
>+	if (camera_->configure(config_.get())) {
>+		config_.reset();
>+		return { Results::Fail, "Failed to configure camera" };
>+	}
>+
>+	return { Results::Pass, "Configure camera" };
>+}
>+
>+Results::Result SimpleCapture::start()
>+{
>+	Stream *stream = config_->at(0).stream();
>+	if (allocator_->allocate(stream) < 0)
>+		return { Results::Fail, "Failed to allocate buffers camera" };

s/buffers camera/buffers/ ?

>+
>+	if (camera_->start())
>+		return { Results::Fail, "Failed to start camera" };
>+
>+	camera_->requestCompleted.connect(this, &SimpleCapture::requestComplete);
>+
>+	return { Results::Pass, "Started camera" };
>+}
>+
>+Results::Result SimpleCapture::capture(unsigned int numRequests)
>+{
>+	Stream *stream = config_->at(0).stream();
>+	const std::vector<std::unique_ptr<FrameBuffer>> &buffers = allocator_->buffers(stream);
>+
>+	/* No point in testing less requests then the camera depth. */
>+	if (buffers.size() > numRequests)
>+		return { Results::Skip, "Camera needs " + std::to_string(buffers.size()) + " requests, can't test only " + std::to_string(numRequests) };

This seems to be quite long

>+
>+	queueCount_ = 0;
>+	captureCount_ = 0;
>+	captureLimit_ = numRequests;
>+
>+	/* Queue the camera recommended number of reqeuests. */

s/camera recommended/recommended/ ?

>+	std::vector<std::unique_ptr<libcamera::Request>> requests;
>+	for (const std::unique_ptr<FrameBuffer> &buffer : allocator_->buffers(stream)) {
>+		std::unique_ptr<Request> request = camera_->createRequest();
>+		if (!request)
>+			return { Results::Fail, "Can't create request" };
>+
>+		if (request->addBuffer(stream, buffer.get()))
>+			return { Results::Fail, "Can't set buffer for request" };
>+
>+		if (queueRequest(request.get()) < 0)
>+			return { Results::Fail, "Failed to queue request" };
>+
>+		requests.push_back(std::move(request));
>+	}
>+
>+	/* Run capture session. */
>+	loop_ = new EventLoop();
>+	loop_->exec();
>+	delete loop_;
>+
>+	if (captureCount_ != captureLimit_)
>+		return { Results::Fail, "Got " + std::to_string(captureCount_) + " request, wanted " + std::to_string(captureLimit_) };

This is also pretty long

>+
>+	return { Results::Pass, "Balanced capture of " + std::to_string(numRequests) + " requests" };
>+}
>+
>+Results::Result SimpleCapture::stop()
>+{
>+	Stream *stream = config_->at(0).stream();
>+
>+	camera_->stop();
>+
>+	camera_->requestCompleted.disconnect(this, &SimpleCapture::requestComplete);
>+
>+	allocator_->free(stream);
>+
>+	return { Results::Pass, "Stopped camera" };
>+}
>+
>+int SimpleCapture::queueRequest(Request *request)
>+{
>+	queueCount_++;
>+	if (queueCount_ > captureLimit_)
>+		return 0;
>+
>+	return camera_->queueRequest(request);
>+}
>+
>+void SimpleCapture::requestComplete(Request *request)
>+{
>+	captureCount_++;
>+	if (captureCount_ >= captureLimit_) {
>+		loop_->exit(0);
>+		return;
>+	}
>+
>+	request->reuse(Request::ReuseBuffers);
>+	if (queueRequest(request))
>+		loop_->exit(-EINVAL);
>+}
>+
>+Results::Result testRequestBalance(std::shared_ptr<Camera> camera,
>+				   unsigned int startCycles,
>+				   unsigned int numRequests)
>+{
>+	SimpleCapture capture(camera);
>+	Results::Result ret;
>+
>+	ret = capture.configure(Viewfinder);
>+	if (ret.first != Results::Pass)
>+		return ret;
>+
>+	for (unsigned int starts = 0; starts < startCycles; starts++) {
>+		ret = capture.start();
>+		if (ret.first != Results::Pass)
>+			return ret;
>+
>+		ret = capture.capture(numRequests);
>+		if (ret.first != Results::Pass) {
>+			capture.stop();
>+			return ret;
>+		}
>+
>+		ret = capture.stop();
>+		if (ret.first != Results::Pass)
>+			return ret;
>+	}
>+
>+	return { Results::Pass, "Balanced capture of " + std::to_string(numRequests) + " requests with " + std::to_string(startCycles) + " start cycles" };
>+}
>+
>+Results testSingleStream(std::shared_ptr<Camera> camera)
>+{
>+	const std::vector<unsigned int> numRequests = { 1, 2, 3, 5, 8, 13, 21, 34, 55, 89 };
>+
>+	Results results(numRequests.size() * 2);
>+
>+	if (!camera)
>+		return results;
>+
>+	/*
>+	 * Test single capture cycles
>+	 *
>+	 * Makes sure the camera completes the exact number of requests queued.
>+	 * Example failure is a camera that needs N+M requests queued to
>+	 * complete N requests to the application.
>+	 */
>+	std::cout << "Test single capture cycles" << std::endl;
>+	for (unsigned int num : numRequests)
>+		results.add(testRequestBalance(camera, 1, num));
>+
>+	/*
>+	 * Test multiple start/stop cycles
>+	 *
>+	 * Makes sure the camera supports multiple start/stop cycles.
>+	 * Example failure is a camera that does not clean up correctly in its
>+	 * error path but is only tested by single-capture applications.
>+	 */
>+	std::cout << "Test multiple start/stop cycles" << std::endl;
>+	for (unsigned int num : numRequests)
>+		results.add(testRequestBalance(camera, 3, num));
>+
>+	return results;
>+}
>diff --git a/src/lc-compliance/tests.h b/src/lc-compliance/tests.h
>new file mode 100644
>index 0000000000000000..396605214e4b8980
>--- /dev/null
>+++ b/src/lc-compliance/tests.h
>@@ -0,0 +1,16 @@
>+/* SPDX-License-Identifier: GPL-2.0-or-later */
>+/*
>+ * Copyright (C) 2020, Google Inc.
>+ *
>+ * tests.h - Test modules
>+ */
>+#ifndef __LC_COMPLIANCE_TESTS_H__
>+#define __LC_COMPLIANCE_TESTS_H__
>+
>+#include <libcamera/libcamera.h>
>+
>+#include "results.h"
>+
>+Results testSingleStream(std::shared_ptr<libcamera::Camera> camera);
>+
>+#endif /* __LC_COMPLIANCE_TESTS_H__ */
>diff --git a/src/meson.build b/src/meson.build
>index 4b75f05878bcb702..a8e1af7adf2ca9c8 100644
>--- a/src/meson.build
>+++ b/src/meson.build
>@@ -18,6 +18,8 @@ subdir('android')
> subdir('libcamera')
> subdir('ipa')
>
>+subdir('lc-compliance')
>+
> subdir('cam')
> subdir('qcam')
>
>-- 
>2.30.0
>
>_______________________________________________
>libcamera-devel mailing list
>libcamera-devel@lists.libcamera.org
>https://lists.libcamera.org/listinfo/libcamera-devel
Niklas Söderlund Jan. 29, 2021, 9:54 p.m. UTC | #3
Hi Sebastian,

Thanks for your feedback.

On 2021-01-29 19:48:56 +0100, Sebastian Fricke wrote:
> Hey Niklas,
> 
> Nice I was eagerly waiting for this patch, thank you for the work.
> 
> Here is how it looks on my NanoPC-T4 (RkISP1)
> https://paste.debian.net/1183263/
> 
> And below I have added some comments, I expect to play around with that
> tool in the near future :).

I'm glad you like it.

> 
> On 29.01.2021 17:53, Niklas Söderlund wrote:
> > Add a compliance tool to ease testing of cameras on target. In contrast
> 
> Could you clarify this sentence a little more? Which target do you
> mean?

The develop machine is sometimes referred to as the 'host' and the 
device under test is referred to as the 'target'. I intended to hint at 
that the unit-test under test/ where run on the host machine and the 
lc-compliance tool was intended to run on the target.

But reading it now this make little sens as lc-compliance is just as 
valid to run on the host as you might test a device that is attached to 
it (USB camera). I will s/on target/.

> 
> > to the unit-tests under test/ that aims to test the internal components
> > of libcamera the compliance aims to test application use-cases and to
> 
> s/compliance/compliance tool/
> 
> > some extend the public API.
> > 
> > This change adds the boilerplate code for a simple framework to write
> > tests in as well as two simple test. The tests aims both to demonstrate
> 
> Maybe this sounds better?
> s/adds the boilerplate code for a simple framework to write tests in/
>   adds the boilerplate code of a simple framework for the creation of
>   tests/
> 
> s/The tests aims/The tests aim/
> 
> > the tool and to catch real problems. The tests added are:
> > 
> > - Test that if one queues exactly N requests to a camera exactly N
> >   requests are eventually completed.
> > 
> > - Test that a configured camera can be started and stopped multiple
> >   times in an attempt to exercise cleanup code paths otherwise not
> >   often tested with 'cam' for example.
> > 
> > Example pass run on Raspberry Pi:
> > 
> >  $ LIBCAMERA_LOG_LEVELS="*:ERROR" lc-compliance -c "/base/soc/i2c0mux/i2c@1/imx219@10"
> >  [2:36:17.672447527] [11896] ERROR V4L2 v4l2_device.cpp:191 'imx219 10-0010': Control 0x009a0922 not found
> >  [2:36:17.673095289] [11896] ERROR V4L2 v4l2_subdevice.cpp:285 'imx219 10-0010': Unable to get rectangle 2 on pad 0: Invalid argument
> >  Using camera /base/soc/i2c0mux/i2c@1/imx219@10
> >  Test single capture cycles
> >  - SKIP - Camera needs 4 requests, can't test only 1
> >  - SKIP - Camera needs 4 requests, can't test only 2
> >  - SKIP - Camera needs 4 requests, can't test only 3
> >  - PASS - Balanced capture of 5 requests with 1 start cycles
> >  - PASS - Balanced capture of 8 requests with 1 start cycles
> >  - PASS - Balanced capture of 13 requests with 1 start cycles
> >  - PASS - Balanced capture of 21 requests with 1 start cycles
> >  - PASS - Balanced capture of 34 requests with 1 start cycles
> >  - PASS - Balanced capture of 55 requests with 1 start cycles
> >  - PASS - Balanced capture of 89 requests with 1 start cycles
> >  Test multiple start/stop cycles
> >  - SKIP - Camera needs 4 requests, can't test only 1
> >  - SKIP - Camera needs 4 requests, can't test only 2
> >  - SKIP - Camera needs 4 requests, can't test only 3
> >  - PASS - Balanced capture of 5 requests with 3 start cycles
> >  - PASS - Balanced capture of 8 requests with 3 start cycles
> >  - PASS - Balanced capture of 13 requests with 3 start cycles
> >  - PASS - Balanced capture of 21 requests with 3 start cycles
> >  - PASS - Balanced capture of 34 requests with 3 start cycles
> >  - PASS - Balanced capture of 55 requests with 3 start cycles
> >  - PASS - Balanced capture of 89 requests with 3 start cycles
> >  20 tests executed, 14 tests passed, 6 tests skipped and 0 tests failed
> > 
> > Example fail run on IPU3:
> > 
> >  - LIBCAMERA_LOG_LEVELS="*:ERROR" lc-compliance -c "\_SB_.PCI0.I2C2.CAM0"
> >  - [0:31:36.992763102] [6420] ERROR V4L2 v4l2_device.cpp:191 'ov13858 8-0010': Control 0x009a0922 not found
> >  - [0:31:36.992815436] [6420] ERROR V4L2 v4l2_subdevice.cpp:285 'ov13858 8-0010': Unable to get rectangle 2 on pad 0: Inappropriate ioctl for device
> >  - [0:31:36.992847049] [6420] ERROR V4L2 v4l2_subdevice.cpp:285 'ov13858 8-0010': Unable to get rectangle 1 on pad 0: Inappropriate ioctl for device
> >  - [0:31:36.992869029] [6420] ERROR V4L2 v4l2_subdevice.cpp:285 'ov13858 8-0010': Unable to get rectangle 0 on pad 0: Inappropriate ioctl for device
> >  - [0:31:36.993152932] [6420] ERROR V4L2 v4l2_subdevice.cpp:285 'ov13858 8-0010': Unable to get rectangle 0 on pad 0: Inappropriate ioctl for device
> >  - [0:31:36.993172833] [6420] ERROR CameraSensor camera_sensor.cpp:678 'ov13858 8-0010': The analogue crop rectangle has been defaulted to the active area size
> >  - [0:31:36.993208149] [6420] ERROR V4L2 v4l2_subdevice.cpp:285 'ov13858 8-0010': Unable to get rectangle 0 on pad 0: Inappropriate ioctl for device
> >  - [0:31:36.993224502] [6420] ERROR CameraSensor camera_sensor.cpp:678 'ov13858 8-0010': The analogue crop rectangle has been defaulted to the active area size
> >  - [0:31:36.993354770] [6420] ERROR V4L2 v4l2_device.cpp:191 'ov5670 10-0036': Control 0x009a0922 not found
> >  - [0:31:36.993377622] [6420] ERROR V4L2 v4l2_subdevice.cpp:285 'ov5670 10-0036': Unable to get rectangle 2 on pad 0: Inappropriate ioctl for device
> >  - [0:31:36.993398093] [6420] ERROR V4L2 v4l2_subdevice.cpp:285 'ov5670 10-0036': Unable to get rectangle 1 on pad 0: Inappropriate ioctl for device
> >  - [0:31:36.993415611] [6420] ERROR V4L2 v4l2_subdevice.cpp:285 'ov5670 10-0036': Unable to get rectangle 0 on pad 0: Inappropriate ioctl for device
> >  - [0:31:36.993660192] [6420] ERROR V4L2 v4l2_subdevice.cpp:285 'ov5670 10-0036': Unable to get rectangle 0 on pad 0: Inappropriate ioctl for device
> >  - [0:31:36.993678492] [6420] ERROR CameraSensor camera_sensor.cpp:678 'ov5670 10-0036': The analogue crop rectangle has been defaulted to the active area size
> >  - [0:31:36.993724648] [6420] ERROR V4L2 v4l2_subdevice.cpp:285 'ov5670 10-0036': Unable to get rectangle 0 on pad 0: Inappropriate ioctl for device
> >  - [0:31:36.993741032] [6420] ERROR CameraSensor camera_sensor.cpp:678 'ov5670 10-0036': The analogue crop rectangle has been defaulted to the active area size
> >  - Using camera \_SB_.PCI0.I2C2.CAM0
> >  - Test single capture cycles
> >  - - SKIP - Camera needs 4 requests, can't test only 1
> >  - - SKIP - Camera needs 4 requests, can't test only 2
> >  - - SKIP - Camera needs 4 requests, can't test only 3
> >  - - PASS - Balanced capture of 5 requests with 1 start cycles
> >  - - PASS - Balanced capture of 8 requests with 1 start cycles
> >  - - PASS - Balanced capture of 13 requests with 1 start cycles
> >  - - PASS - Balanced capture of 21 requests with 1 start cycles
> >  - - PASS - Balanced capture of 34 requests with 1 start cycles
> >  - [0:31:41.969783243] [6420] ERROR IPU3 cio2.cpp:264 CIO2 buffer underrun
> >  <Application lockup here as the pipeline error is not propagated to the application>
> > 
> > Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
> > ---
> > Hi,
> > 
> > I have tested this on RkISP1, RPi and IPU3 on latest master [1]. I plan
> > to post separate patches which starts to address some of the problems
> > found while working. A fix for 'cam --captur=N' is coming shortly for
> > example.
> > 
> > I still have to find a good fix for a races found in the
> > IPU3 pipeline between the CIO2 and IMGU (as showed above). What I don't
> > (yet) have a plan for is how to fix that request queueing errors are not
> > propagated in our application facing API leading the test application to
> > wait forever to a request the library knows have failed, ideas welcome.
> > 
> > 1. 958c80a4f1c28301 ("android: camera_device: Set AE precapture trigger according to request")
> > ---
> > src/lc-compliance/main.cpp          | 139 ++++++++++++++++++
> > src/lc-compliance/meson.build       |  24 ++++
> > src/lc-compliance/results.cpp       |  75 ++++++++++
> > src/lc-compliance/results.h         |  45 ++++++
> > src/lc-compliance/single_stream.cpp | 210 ++++++++++++++++++++++++++++
> > src/lc-compliance/tests.h           |  16 +++
> > src/meson.build                     |   2 +
> > 7 files changed, 511 insertions(+)
> > create mode 100644 src/lc-compliance/main.cpp
> > create mode 100644 src/lc-compliance/meson.build
> > create mode 100644 src/lc-compliance/results.cpp
> > create mode 100644 src/lc-compliance/results.h
> > create mode 100644 src/lc-compliance/single_stream.cpp
> > create mode 100644 src/lc-compliance/tests.h
> > 
> > diff --git a/src/lc-compliance/main.cpp b/src/lc-compliance/main.cpp
> > new file mode 100644
> > index 0000000000000000..e1cbce7eac3df2bc
> > --- /dev/null
> > +++ b/src/lc-compliance/main.cpp
> > @@ -0,0 +1,139 @@
> > +/* SPDX-License-Identifier: GPL-2.0-or-later */
> > +/*
> > + * Copyright (C) 2020, Google Inc.
> > + *
> > + * main.cpp - lc-compliance - The libcamera compliance tool
> > + */
> > +
> > +#include <iomanip>
> > +#include <iostream>
> > +#include <string.h>
> > +
> > +#include <libcamera/libcamera.h>
> > +
> > +#include "../cam/options.h"
> > +#include "tests.h"
> > +
> > +using namespace libcamera;
> > +
> > +class Harness
> > +{
> > +public:
> > +	Harness();
> > +	~Harness();
> > +
> > +	int exec(int argc, char **argv);
> > +
> > +private:
> > +	enum {
> > +		OptCamera = 'c',
> > +		OptHelp = 'h',
> > +	};
> > +
> > +	int parseOptions(int argc, char **argv);
> > +	int init(int argc, char **argv);
> > +
> > +	OptionsParser::Options options_;
> > +	std::unique_ptr<CameraManager> cm_;
> > +	std::shared_ptr<Camera> camera_;
> > +};
> > +
> > +Harness::Harness()
> > +{
> > +	cm_ = std::make_unique<CameraManager>();
> > +}
> > +
> > +Harness::~Harness()
> > +{
> > +	if (camera_) {
> > +		camera_->release();
> > +		camera_.reset();
> > +	}
> > +
> > +	cm_->stop();
> > +}
> > +
> > +int Harness::exec(int argc, char **argv)
> > +{
> > +	int ret = init(argc, argv);
> > +	if (ret)
> > +		return ret;
> > +
> > +	std::vector<Results> results;
> > +
> > +	results.push_back(testSingleStream(camera_));
> > +
> > +	for (const Results &result : results) {
> > +		ret = result.summary();
> > +		if (ret)
> > +			return ret;
> > +	}
> > +
> > +	return 0;
> > +}
> > +
> > +int Harness::init(int argc, char **argv)
> > +{
> > +	int ret = parseOptions(argc, argv);
> > +	if (ret < 0)
> > +		return ret;
> > +
> > +	ret = cm_->start();
> > +	if (ret) {
> > +		std::cout << "Failed to start camera manager: "
> > +			  << strerror(-ret) << std::endl;
> > +		return ret;
> > +	}
> > +
> > +	if (!options_.isSet(OptCamera)) {
> > +		std::cout << "No camera specified, available cameras:" << std::endl;
> > +		for (const std::shared_ptr<Camera> &cam : cm_->cameras())
> > +			std::cout << "- " << cam.get()->id() << std::endl;
> > +		return -ENODEV;
> > +	}
> > +
> > +	const std::string &cameraId = options_[OptCamera];
> > +	camera_ = cm_->get(cameraId);
> > +	if (!camera_) {
> > +		std::cout << "Camera " << cameraId << " not found, available cameras:" << std::endl;
> > +		for (const std::shared_ptr<Camera> &cam : cm_->cameras())
> > +			std::cout << "- " << cam.get()->id() << std::endl;
> > +		return -ENODEV;
> > +	}
> > +
> > +	if (camera_->acquire()) {
> > +		std::cout << "Failed to acquire camera" << std::endl;
> > +		return -EINVAL;
> > +	}
> > +
> > +	std::cout << "Using camera " << cameraId << std::endl;
> > +
> > +	return 0;
> > +}
> > +
> > +int Harness::parseOptions(int argc, char **argv)
> > +{
> > +	OptionsParser parser;
> > +	parser.addOption(OptCamera, OptionString,
> > +			 "Specify which camera to operate on, by id", "camera",
> > +			 ArgumentRequired, "camera");
> > +	parser.addOption(OptHelp, OptionNone, "Display this help message",
> > +			 "help");
> > +
> > +	options_ = parser.parse(argc, argv);
> > +	if (!options_.valid())
> > +		return -EINVAL;
> > +
> > +	if (options_.empty() || options_.isSet(OptHelp)) {
> > +		parser.usage();
> > +		return options_.empty() ? -EINVAL : -EINTR;
> > +	}
> > +
> > +	return 0;
> > +}
> > +
> > +int main(int argc, char **argv)
> > +{
> > +	Harness harness;
> > +	return harness.exec(argc, argv) ? EXIT_FAILURE : 0;
> > +}
> > diff --git a/src/lc-compliance/meson.build b/src/lc-compliance/meson.build
> > new file mode 100644
> > index 0000000000000000..d700a307c71405b4
> > --- /dev/null
> > +++ b/src/lc-compliance/meson.build
> > @@ -0,0 +1,24 @@
> > +# SPDX-License-Identifier: CC0-1.0
> > +
> > +libevent = dependency('libevent_pthreads', required : false)
> > +
> > +if not libevent.found()
> > +    warning('libevent_pthreads not found, \'lc-compliance\' application will not be compiled')
> > +    subdir_done()
> > +endif
> > +
> > +lc_compliance_sources = files([
> > +    '../cam/event_loop.cpp',
> > +    '../cam/options.cpp',
> > +    'main.cpp',
> > +    'results.cpp',
> > +    'single_stream.cpp',
> > +])
> > +
> > +lc_compliance  = executable('lc-compliance', lc_compliance_sources,
> > +                  dependencies : [
> > +                      libatomic,
> > +                      libcamera_dep,
> > +                      libevent,
> > +                  ],
> > +                  install : true)
> > diff --git a/src/lc-compliance/results.cpp b/src/lc-compliance/results.cpp
> > new file mode 100644
> > index 0000000000000000..fb4242bf49a3268b
> > --- /dev/null
> > +++ b/src/lc-compliance/results.cpp
> > @@ -0,0 +1,75 @@
> > +/* SPDX-License-Identifier: GPL-2.0-or-later */
> > +/*
> > + * Copyright (C) 2020, Google Inc.
> > + *
> > + * results.cpp - Test result aggregator
> > + */
> > +
> > +#include "results.h"
> > +
> > +#include <iostream>
> > +
> > +void Results::add(const Result &result)
> > +{
> > +	if (result.first == Pass)
> > +		passed_++;
> > +	else if (result.first == Fail)
> > +		failed_++;
> > +	else if (result.first == Skip)
> > +		skipped_++;
> > +
> > +	printResult(result);
> > +}
> > +
> > +void Results::add(Status status, const std::string &message)
> > +{
> > +	add({ status, message });
> > +}
> > +
> > +void Results::fail(const std::string &message)
> > +{
> > +	add(Fail, message);
> > +}
> > +
> > +void Results::pass(const std::string &message)
> > +{
> > +	add(Pass, message);
> > +}
> > +
> > +void Results::skip(const std::string &message)
> > +{
> > +	add(Skip, message);
> > +}
> > +
> > +int Results::summary() const
> > +{
> > +	if (failed_ + passed_ + skipped_ != planned_) {
> > +		std::cout << "Planned and executed numer of tests differ "
> 
> s/numer/number/

Guess I miss Sweden :-)

> 
> > +			  << failed_ + passed_ + skipped_ << " executed "
> > +			  << planned_ << " planned" << std::endl;
> > +
> > +		return -EINVAL;
> > +	}
> > +
> > +	std::cout << planned_ << " tests executed, "
> > +		  << passed_ << " tests passed, "
> > +		  << skipped_ << " tests skipped and "
> > +		  << failed_ << " tests failed " << std::endl;
> > +
> > +	return 0;
> > +}
> > +
> > +void Results::printResult(const Result &result)
> > +{
> > +	std::string prefix;
> > +
> > +	/* \todo Make parsable as TAP. */
> 
> What do you mean with TAP?

TAP - Test Anything Protocol
https://testanything.org/

It's a simple text protocol to convey test results. It has some 
advantages for testing I find really useful.

- Simple. No need to depend on any test library or such on the test 
  point producer. It may be as simple as printf(). I have a rather large 
  set of bash script that outputs TAP I use to test boards.

- Robust. It allows application "noise" to be intertwined with test 
  results. This is really useful if the only link you have between host 
  and target is a serial console.

- Portable. There are lots of tools that understands TAP so no need to 
  reinvent the wheel which is grate if you want to use it for automatic 
  testing for example.

> 
> > +	if (result.first == Pass)
> > +		prefix = "PASS";
> > +	else if (result.first == Fail)
> > +		prefix = "FAIL";
> > +	else if (result.first == Skip)
> > +		prefix = "SKIP";
> > +
> > +	std::cout << "- " << prefix << " - " << result.second << std::endl;
> > +}
> > diff --git a/src/lc-compliance/results.h b/src/lc-compliance/results.h
> > new file mode 100644
> > index 0000000000000000..a02fd5ab46edd62c
> > --- /dev/null
> > +++ b/src/lc-compliance/results.h
> > @@ -0,0 +1,45 @@
> > +/* SPDX-License-Identifier: GPL-2.0-or-later */
> > +/*
> > + * Copyright (C) 2020, Google Inc.
> > + *
> > + * results.h - Test result aggregator
> > + */
> > +#ifndef __LC_COMPLIANCE_RESULTS_H__
> > +#define __LC_COMPLIANCE_RESULTS_H__
> > +
> > +#include <string>
> > +
> > +class Results
> > +{
> > +public:
> > +	enum Status {
> > +		Fail,
> > +		Pass,
> > +		Skip,
> > +	};
> > +
> > +	using Result = std::pair<Status, std::string>;
> > +
> > +	Results(unsigned int planned)
> > +		: planned_(planned), passed_(0), failed_(0), skipped_(0)
> > +	{
> > +	}
> > +
> > +	void add(const Result &result);
> > +	void add(Status status, const std::string &message);
> > +	void fail(const std::string &message);
> > +	void pass(const std::string &message);
> > +	void skip(const std::string &message);
> > +
> > +	int summary() const;
> > +
> > +private:
> > +	void printResult(const Result &result);
> > +
> > +	unsigned int planned_;
> > +	unsigned int passed_;
> > +	unsigned int failed_;
> > +	unsigned int skipped_;
> > +};
> > +
> > +#endif /* __LC_COMPLIANCE_RESULTS_H__ */
> > diff --git a/src/lc-compliance/single_stream.cpp b/src/lc-compliance/single_stream.cpp
> > new file mode 100644
> > index 0000000000000000..d31b6f8d06487a85
> > --- /dev/null
> > +++ b/src/lc-compliance/single_stream.cpp
> > @@ -0,0 +1,210 @@
> > +/* SPDX-License-Identifier: GPL-2.0-or-later */
> > +/*
> > + * Copyright (C) 2020, Google Inc.
> > + *
> > + * single_stream.cpp - Test a single camera stream
> > + */
> > +
> > +#include <iostream>
> > +
> > +#include "../cam/event_loop.h"
> > +#include "tests.h"
> > +
> > +using namespace libcamera;
> > +
> > +class SimpleCapture
> > +{
> > +public:
> > +	SimpleCapture(std::shared_ptr<Camera> camera)
> > +		: camera_(camera), allocator_(std::make_unique<FrameBufferAllocator>(camera))
> > +	{
> > +	}
> > +
> > +	Results::Result configure(StreamRole role);
> > +	Results::Result start();
> > +	Results::Result capture(unsigned int numRequests);
> > +	Results::Result stop();
> > +
> > +private:
> > +	int queueRequest(Request *request);
> > +	void requestComplete(Request *request);
> > +
> > +	std::shared_ptr<libcamera::Camera> camera_;
> > +	std::unique_ptr<FrameBufferAllocator> allocator_;
> > +	std::unique_ptr<libcamera::CameraConfiguration> config_;
> > +
> > +	EventLoop *loop_;
> > +	unsigned int queueCount_;
> > +	unsigned int captureCount_;
> > +	unsigned int captureLimit_;
> > +};
> > +
> > +Results::Result SimpleCapture::configure(StreamRole role)
> > +{
> > +	config_ = camera_->generateConfiguration({ role });
> > +
> > +	if (config_->validate() != CameraConfiguration::Valid) {
> > +		config_.reset();
> > +		return { Results::Fail, "Configuration not valid" };
> > +	}
> > +
> > +	if (camera_->configure(config_.get())) {
> > +		config_.reset();
> > +		return { Results::Fail, "Failed to configure camera" };
> > +	}
> > +
> > +	return { Results::Pass, "Configure camera" };
> > +}
> > +
> > +Results::Result SimpleCapture::start()
> > +{
> > +	Stream *stream = config_->at(0).stream();
> > +	if (allocator_->allocate(stream) < 0)
> > +		return { Results::Fail, "Failed to allocate buffers camera" };
> 
> s/buffers camera/buffers/ ?
> 
> > +
> > +	if (camera_->start())
> > +		return { Results::Fail, "Failed to start camera" };
> > +
> > +	camera_->requestCompleted.connect(this, &SimpleCapture::requestComplete);
> > +
> > +	return { Results::Pass, "Started camera" };
> > +}
> > +
> > +Results::Result SimpleCapture::capture(unsigned int numRequests)
> > +{
> > +	Stream *stream = config_->at(0).stream();
> > +	const std::vector<std::unique_ptr<FrameBuffer>> &buffers = allocator_->buffers(stream);
> > +
> > +	/* No point in testing less requests then the camera depth. */
> > +	if (buffers.size() > numRequests)
> > +		return { Results::Skip, "Camera needs " + std::to_string(buffers.size()) + " requests, can't test only " + std::to_string(numRequests) };
> 
> This seems to be quite long

I agree, but I really like to have the strings on one line. Makes 
grepping the code much easier. But I will bow to popular demand :-)

I have taken all your language improvements onboard for next version, 
thanks!

> 
> > +
> > +	queueCount_ = 0;
> > +	captureCount_ = 0;
> > +	captureLimit_ = numRequests;
> > +
> > +	/* Queue the camera recommended number of reqeuests. */
> 
> s/camera recommended/recommended/ ?
> 
> > +	std::vector<std::unique_ptr<libcamera::Request>> requests;
> > +	for (const std::unique_ptr<FrameBuffer> &buffer : allocator_->buffers(stream)) {
> > +		std::unique_ptr<Request> request = camera_->createRequest();
> > +		if (!request)
> > +			return { Results::Fail, "Can't create request" };
> > +
> > +		if (request->addBuffer(stream, buffer.get()))
> > +			return { Results::Fail, "Can't set buffer for request" };
> > +
> > +		if (queueRequest(request.get()) < 0)
> > +			return { Results::Fail, "Failed to queue request" };
> > +
> > +		requests.push_back(std::move(request));
> > +	}
> > +
> > +	/* Run capture session. */
> > +	loop_ = new EventLoop();
> > +	loop_->exec();
> > +	delete loop_;
> > +
> > +	if (captureCount_ != captureLimit_)
> > +		return { Results::Fail, "Got " + std::to_string(captureCount_) + " request, wanted " + std::to_string(captureLimit_) };
> 
> This is also pretty long
> 
> > +
> > +	return { Results::Pass, "Balanced capture of " + std::to_string(numRequests) + " requests" };
> > +}
> > +
> > +Results::Result SimpleCapture::stop()
> > +{
> > +	Stream *stream = config_->at(0).stream();
> > +
> > +	camera_->stop();
> > +
> > +	camera_->requestCompleted.disconnect(this, &SimpleCapture::requestComplete);
> > +
> > +	allocator_->free(stream);
> > +
> > +	return { Results::Pass, "Stopped camera" };
> > +}
> > +
> > +int SimpleCapture::queueRequest(Request *request)
> > +{
> > +	queueCount_++;
> > +	if (queueCount_ > captureLimit_)
> > +		return 0;
> > +
> > +	return camera_->queueRequest(request);
> > +}
> > +
> > +void SimpleCapture::requestComplete(Request *request)
> > +{
> > +	captureCount_++;
> > +	if (captureCount_ >= captureLimit_) {
> > +		loop_->exit(0);
> > +		return;
> > +	}
> > +
> > +	request->reuse(Request::ReuseBuffers);
> > +	if (queueRequest(request))
> > +		loop_->exit(-EINVAL);
> > +}
> > +
> > +Results::Result testRequestBalance(std::shared_ptr<Camera> camera,
> > +				   unsigned int startCycles,
> > +				   unsigned int numRequests)
> > +{
> > +	SimpleCapture capture(camera);
> > +	Results::Result ret;
> > +
> > +	ret = capture.configure(Viewfinder);
> > +	if (ret.first != Results::Pass)
> > +		return ret;
> > +
> > +	for (unsigned int starts = 0; starts < startCycles; starts++) {
> > +		ret = capture.start();
> > +		if (ret.first != Results::Pass)
> > +			return ret;
> > +
> > +		ret = capture.capture(numRequests);
> > +		if (ret.first != Results::Pass) {
> > +			capture.stop();
> > +			return ret;
> > +		}
> > +
> > +		ret = capture.stop();
> > +		if (ret.first != Results::Pass)
> > +			return ret;
> > +	}
> > +
> > +	return { Results::Pass, "Balanced capture of " + std::to_string(numRequests) + " requests with " + std::to_string(startCycles) + " start cycles" };
> > +}
> > +
> > +Results testSingleStream(std::shared_ptr<Camera> camera)
> > +{
> > +	const std::vector<unsigned int> numRequests = { 1, 2, 3, 5, 8, 13, 21, 34, 55, 89 };
> > +
> > +	Results results(numRequests.size() * 2);
> > +
> > +	if (!camera)
> > +		return results;
> > +
> > +	/*
> > +	 * Test single capture cycles
> > +	 *
> > +	 * Makes sure the camera completes the exact number of requests queued.
> > +	 * Example failure is a camera that needs N+M requests queued to
> > +	 * complete N requests to the application.
> > +	 */
> > +	std::cout << "Test single capture cycles" << std::endl;
> > +	for (unsigned int num : numRequests)
> > +		results.add(testRequestBalance(camera, 1, num));
> > +
> > +	/*
> > +	 * Test multiple start/stop cycles
> > +	 *
> > +	 * Makes sure the camera supports multiple start/stop cycles.
> > +	 * Example failure is a camera that does not clean up correctly in its
> > +	 * error path but is only tested by single-capture applications.
> > +	 */
> > +	std::cout << "Test multiple start/stop cycles" << std::endl;
> > +	for (unsigned int num : numRequests)
> > +		results.add(testRequestBalance(camera, 3, num));
> > +
> > +	return results;
> > +}
> > diff --git a/src/lc-compliance/tests.h b/src/lc-compliance/tests.h
> > new file mode 100644
> > index 0000000000000000..396605214e4b8980
> > --- /dev/null
> > +++ b/src/lc-compliance/tests.h
> > @@ -0,0 +1,16 @@
> > +/* SPDX-License-Identifier: GPL-2.0-or-later */
> > +/*
> > + * Copyright (C) 2020, Google Inc.
> > + *
> > + * tests.h - Test modules
> > + */
> > +#ifndef __LC_COMPLIANCE_TESTS_H__
> > +#define __LC_COMPLIANCE_TESTS_H__
> > +
> > +#include <libcamera/libcamera.h>
> > +
> > +#include "results.h"
> > +
> > +Results testSingleStream(std::shared_ptr<libcamera::Camera> camera);
> > +
> > +#endif /* __LC_COMPLIANCE_TESTS_H__ */
> > diff --git a/src/meson.build b/src/meson.build
> > index 4b75f05878bcb702..a8e1af7adf2ca9c8 100644
> > --- a/src/meson.build
> > +++ b/src/meson.build
> > @@ -18,6 +18,8 @@ subdir('android')
> > subdir('libcamera')
> > subdir('ipa')
> > 
> > +subdir('lc-compliance')
> > +
> > subdir('cam')
> > subdir('qcam')
> > 
> > -- 
> > 2.30.0
> > 
> > _______________________________________________
> > libcamera-devel mailing list
> > libcamera-devel@lists.libcamera.org
> > https://lists.libcamera.org/listinfo/libcamera-devel
Niklas Söderlund Jan. 29, 2021, 10:44 p.m. UTC | #4
Hi Naushir,

Thanks for your feedback.

On 2021-01-29 18:05:22 +0000, Naushir Patuck wrote:
> Hi Niklas,
> 
> Thank you for your work, this looks quite interesting.  However, I have a
> high level question, see below.
> 
> On Fri, 29 Jan 2021 at 16:53, Niklas Söderlund <
> niklas.soderlund@ragnatech.se> wrote:
> 
> > Add a compliance tool to ease testing of cameras on target. In contrast
> > to the unit-tests under test/ that aims to test the internal components
> > of libcamera the compliance aims to test application use-cases and to
> > some extend the public API.
> >
> > This change adds the boilerplate code for a simple framework to write
> > tests in as well as two simple test. The tests aims both to demonstrate
> > the tool and to catch real problems. The tests added are:
> >
> >  - Test that if one queues exactly N requests to a camera exactly N
> >    requests are eventually completed.
> >
> >  - Test that a configured camera can be started and stopped multiple
> >    times in an attempt to exercise cleanup code paths otherwise not
> >    often tested with 'cam' for example.
> >
> > Example pass run on Raspberry Pi:
> >
> >   $ LIBCAMERA_LOG_LEVELS="*:ERROR" lc-compliance -c
> > "/base/soc/i2c0mux/i2c@1/imx219@10"
> >   [2:36:17.672447527] [11896] ERROR V4L2 v4l2_device.cpp:191 'imx219
> > 10-0010': Control 0x009a0922 not found
> >   [2:36:17.673095289] [11896] ERROR V4L2 v4l2_subdevice.cpp:285 'imx219
> > 10-0010': Unable to get rectangle 2 on pad 0: Invalid argument
> >   Using camera /base/soc/i2c0mux/i2c@1/imx219@10
> >   Test single capture cycles
> >   - SKIP - Camera needs 4 requests, can't test only 1
> >   - SKIP - Camera needs 4 requests, can't test only 2
> >   - SKIP - Camera needs 4 requests, can't test only 3
> >
> 
> I'm a bit curious about the above 3 lines.  From what I make out, it is
> saying that the pipeline cannot run with < 4 on-the-go requests, is that
> correct?

Yes and no, or rather I don't know :-)

The StreamConfiguration::bufferCount was added ~ 1 year age as:

    4a5febd7ddd798c7 ("libcamera: streams: extend stream configuration with buffer count")

    The camera needs to be configured with the number of buffers 
    required to satisfy the applications use case. While the application 
    can request any  number of buffers, the pipeline must take the 
    constraints of the Linux driver into consideration.

    +/**
    + * \var StreamConfiguration::bufferCount
    + * \brief Requested number of buffers to allocate for the stream
    + */

IIRC the idea at the time was to allow for pipelines informing 
applications a minimum number of buffers needed for the kernel driver to 
"work". There are V4L2 drivers that does not start the streaming before 
N buffers were queued to the video device. I'm not sure if any still 
exists but I know they have, I authored one but have since mended my 
ways.

There was also a need to configure the pipeline with an expected number 
of requests that could be in-flight by an application so the pipeline 
could allocate internal resources/buffers. Specifically for inline ISPs, 
if only one buffer was used for the sensor to memory dmaengine the frame 
rate would be rather low even if the application queued multiple 
requests.

As we progressed and added IPAs for real at least I started to think of 
the bufferCount as the pipeline depth needed to keep the IPA running 
smooth. That is the number of requests that needs to be queued to the 
camera at any given point in time to not stall the 3A.

I even started to think about/design how this could be done on a 
libcamera core level to make pipelines life easier. Then we started the 
camera model debate which I really like and how it could address more 
then this particular ambiguity. As an example we also have 
StreamConfiguration::stride which is a read-only property from an 
application point of view that probably also should be reworked so 
applications to some extend could ask for a stride.

> Does that determination come from the buffer count returned by
> PipelineHandler::GenerateConfiguration()?

Yes.

> I *think* the Raspberry Pi stack
> should be able to handle any number of on-the-go requests.  I say think,
> because I do not normally run in that configuration, but I do know some of
> our users might have.  The buffer count of 4 returned
> by PipelineHandlerRPi::generateConfiguration() is a somewhat educated guess
> for a reasonable number of buffers.  Is this something we need to update in
> our pipeline handler for this to work?

I would wait for the dust to settle around the camera model. Maybe I was 
too draconic in my interpretation and skipping testing with buffers less 
then the bufferCount. I have tested this for RPi with 1 request and it 
works, but I'm unsure how this is done in other pipelines so I took the 
safest route to start out.

> 
> Regards,
> Naush
> 
> 
> >   - PASS - Balanced capture of 5 requests with 1 start cycles
> >   - PASS - Balanced capture of 8 requests with 1 start cycles
> >   - PASS - Balanced capture of 13 requests with 1 start cycles
> >   - PASS - Balanced capture of 21 requests with 1 start cycles
> >   - PASS - Balanced capture of 34 requests with 1 start cycles
> >   - PASS - Balanced capture of 55 requests with 1 start cycles
> >   - PASS - Balanced capture of 89 requests with 1 start cycles
> >   Test multiple start/stop cycles
> >   - SKIP - Camera needs 4 requests, can't test only 1
> >   - SKIP - Camera needs 4 requests, can't test only 2
> >   - SKIP - Camera needs 4 requests, can't test only 3
> >   - PASS - Balanced capture of 5 requests with 3 start cycles
> >   - PASS - Balanced capture of 8 requests with 3 start cycles
> >   - PASS - Balanced capture of 13 requests with 3 start cycles
> >   - PASS - Balanced capture of 21 requests with 3 start cycles
> >   - PASS - Balanced capture of 34 requests with 3 start cycles
> >   - PASS - Balanced capture of 55 requests with 3 start cycles
> >   - PASS - Balanced capture of 89 requests with 3 start cycles
> >   20 tests executed, 14 tests passed, 6 tests skipped and 0 tests failed
> >
> > Example fail run on IPU3:
> >
> >   - LIBCAMERA_LOG_LEVELS="*:ERROR" lc-compliance -c "\_SB_.PCI0.I2C2.CAM0"
> >   - [0:31:36.992763102] [6420] ERROR V4L2 v4l2_device.cpp:191 'ov13858
> > 8-0010': Control 0x009a0922 not found
> >   - [0:31:36.992815436] [6420] ERROR V4L2 v4l2_subdevice.cpp:285 'ov13858
> > 8-0010': Unable to get rectangle 2 on pad 0: Inappropriate ioctl for device
> >   - [0:31:36.992847049] [6420] ERROR V4L2 v4l2_subdevice.cpp:285 'ov13858
> > 8-0010': Unable to get rectangle 1 on pad 0: Inappropriate ioctl for device
> >   - [0:31:36.992869029] [6420] ERROR V4L2 v4l2_subdevice.cpp:285 'ov13858
> > 8-0010': Unable to get rectangle 0 on pad 0: Inappropriate ioctl for device
> >   - [0:31:36.993152932] [6420] ERROR V4L2 v4l2_subdevice.cpp:285 'ov13858
> > 8-0010': Unable to get rectangle 0 on pad 0: Inappropriate ioctl for device
> >   - [0:31:36.993172833] [6420] ERROR CameraSensor camera_sensor.cpp:678
> > 'ov13858 8-0010': The analogue crop rectangle has been defaulted to the
> > active area size
> >   - [0:31:36.993208149] [6420] ERROR V4L2 v4l2_subdevice.cpp:285 'ov13858
> > 8-0010': Unable to get rectangle 0 on pad 0: Inappropriate ioctl for device
> >   - [0:31:36.993224502] [6420] ERROR CameraSensor camera_sensor.cpp:678
> > 'ov13858 8-0010': The analogue crop rectangle has been defaulted to the
> > active area size
> >   - [0:31:36.993354770] [6420] ERROR V4L2 v4l2_device.cpp:191 'ov5670
> > 10-0036': Control 0x009a0922 not found
> >   - [0:31:36.993377622] [6420] ERROR V4L2 v4l2_subdevice.cpp:285 'ov5670
> > 10-0036': Unable to get rectangle 2 on pad 0: Inappropriate ioctl for device
> >   - [0:31:36.993398093] [6420] ERROR V4L2 v4l2_subdevice.cpp:285 'ov5670
> > 10-0036': Unable to get rectangle 1 on pad 0: Inappropriate ioctl for device
> >   - [0:31:36.993415611] [6420] ERROR V4L2 v4l2_subdevice.cpp:285 'ov5670
> > 10-0036': Unable to get rectangle 0 on pad 0: Inappropriate ioctl for device
> >   - [0:31:36.993660192] [6420] ERROR V4L2 v4l2_subdevice.cpp:285 'ov5670
> > 10-0036': Unable to get rectangle 0 on pad 0: Inappropriate ioctl for device
> >   - [0:31:36.993678492] [6420] ERROR CameraSensor camera_sensor.cpp:678
> > 'ov5670 10-0036': The analogue crop rectangle has been defaulted to the
> > active area size
> >   - [0:31:36.993724648] [6420] ERROR V4L2 v4l2_subdevice.cpp:285 'ov5670
> > 10-0036': Unable to get rectangle 0 on pad 0: Inappropriate ioctl for device
> >   - [0:31:36.993741032] [6420] ERROR CameraSensor camera_sensor.cpp:678
> > 'ov5670 10-0036': The analogue crop rectangle has been defaulted to the
> > active area size
> >   - Using camera \_SB_.PCI0.I2C2.CAM0
> >   - Test single capture cycles
> >   - - SKIP - Camera needs 4 requests, can't test only 1
> >   - - SKIP - Camera needs 4 requests, can't test only 2
> >   - - SKIP - Camera needs 4 requests, can't test only 3
> >   - - PASS - Balanced capture of 5 requests with 1 start cycles
> >   - - PASS - Balanced capture of 8 requests with 1 start cycles
> >   - - PASS - Balanced capture of 13 requests with 1 start cycles
> >   - - PASS - Balanced capture of 21 requests with 1 start cycles
> >   - - PASS - Balanced capture of 34 requests with 1 start cycles
> >   - [0:31:41.969783243] [6420] ERROR IPU3 cio2.cpp:264 CIO2 buffer underrun
> >   <Application lockup here as the pipeline error is not propagated to the
> > application>
> >
> > Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
> > ---
> > Hi,
> >
> > I have tested this on RkISP1, RPi and IPU3 on latest master [1]. I plan
> > to post separate patches which starts to address some of the problems
> > found while working. A fix for 'cam --captur=N' is coming shortly for
> > example.
> >
> > I still have to find a good fix for a races found in the
> > IPU3 pipeline between the CIO2 and IMGU (as showed above). What I don't
> > (yet) have a plan for is how to fix that request queueing errors are not
> > propagated in our application facing API leading the test application to
> > wait forever to a request the library knows have failed, ideas welcome.
> >
> > 1. 958c80a4f1c28301 ("android: camera_device: Set AE precapture trigger
> > according to request")
> > ---
> >  src/lc-compliance/main.cpp          | 139 ++++++++++++++++++
> >  src/lc-compliance/meson.build       |  24 ++++
> >  src/lc-compliance/results.cpp       |  75 ++++++++++
> >  src/lc-compliance/results.h         |  45 ++++++
> >  src/lc-compliance/single_stream.cpp | 210 ++++++++++++++++++++++++++++
> >  src/lc-compliance/tests.h           |  16 +++
> >  src/meson.build                     |   2 +
> >  7 files changed, 511 insertions(+)
> >  create mode 100644 src/lc-compliance/main.cpp
> >  create mode 100644 src/lc-compliance/meson.build
> >  create mode 100644 src/lc-compliance/results.cpp
> >  create mode 100644 src/lc-compliance/results.h
> >  create mode 100644 src/lc-compliance/single_stream.cpp
> >  create mode 100644 src/lc-compliance/tests.h
> >
> > diff --git a/src/lc-compliance/main.cpp b/src/lc-compliance/main.cpp
> > new file mode 100644
> > index 0000000000000000..e1cbce7eac3df2bc
> > --- /dev/null
> > +++ b/src/lc-compliance/main.cpp
> > @@ -0,0 +1,139 @@
> > +/* SPDX-License-Identifier: GPL-2.0-or-later */
> > +/*
> > + * Copyright (C) 2020, Google Inc.
> > + *
> > + * main.cpp - lc-compliance - The libcamera compliance tool
> > + */
> > +
> > +#include <iomanip>
> > +#include <iostream>
> > +#include <string.h>
> > +
> > +#include <libcamera/libcamera.h>
> > +
> > +#include "../cam/options.h"
> > +#include "tests.h"
> > +
> > +using namespace libcamera;
> > +
> > +class Harness
> > +{
> > +public:
> > +       Harness();
> > +       ~Harness();
> > +
> > +       int exec(int argc, char **argv);
> > +
> > +private:
> > +       enum {
> > +               OptCamera = 'c',
> > +               OptHelp = 'h',
> > +       };
> > +
> > +       int parseOptions(int argc, char **argv);
> > +       int init(int argc, char **argv);
> > +
> > +       OptionsParser::Options options_;
> > +       std::unique_ptr<CameraManager> cm_;
> > +       std::shared_ptr<Camera> camera_;
> > +};
> > +
> > +Harness::Harness()
> > +{
> > +       cm_ = std::make_unique<CameraManager>();
> > +}
> > +
> > +Harness::~Harness()
> > +{
> > +       if (camera_) {
> > +               camera_->release();
> > +               camera_.reset();
> > +       }
> > +
> > +       cm_->stop();
> > +}
> > +
> > +int Harness::exec(int argc, char **argv)
> > +{
> > +       int ret = init(argc, argv);
> > +       if (ret)
> > +               return ret;
> > +
> > +       std::vector<Results> results;
> > +
> > +       results.push_back(testSingleStream(camera_));
> > +
> > +       for (const Results &result : results) {
> > +               ret = result.summary();
> > +               if (ret)
> > +                       return ret;
> > +       }
> > +
> > +       return 0;
> > +}
> > +
> > +int Harness::init(int argc, char **argv)
> > +{
> > +       int ret = parseOptions(argc, argv);
> > +       if (ret < 0)
> > +               return ret;
> > +
> > +       ret = cm_->start();
> > +       if (ret) {
> > +               std::cout << "Failed to start camera manager: "
> > +                         << strerror(-ret) << std::endl;
> > +               return ret;
> > +       }
> > +
> > +       if (!options_.isSet(OptCamera)) {
> > +               std::cout << "No camera specified, available cameras:" <<
> > std::endl;
> > +               for (const std::shared_ptr<Camera> &cam : cm_->cameras())
> > +                       std::cout << "- " << cam.get()->id() << std::endl;
> > +               return -ENODEV;
> > +       }
> > +
> > +       const std::string &cameraId = options_[OptCamera];
> > +       camera_ = cm_->get(cameraId);
> > +       if (!camera_) {
> > +               std::cout << "Camera " << cameraId << " not found,
> > available cameras:" << std::endl;
> > +               for (const std::shared_ptr<Camera> &cam : cm_->cameras())
> > +                       std::cout << "- " << cam.get()->id() << std::endl;
> > +               return -ENODEV;
> > +       }
> > +
> > +       if (camera_->acquire()) {
> > +               std::cout << "Failed to acquire camera" << std::endl;
> > +               return -EINVAL;
> > +       }
> > +
> > +       std::cout << "Using camera " << cameraId << std::endl;
> > +
> > +       return 0;
> > +}
> > +
> > +int Harness::parseOptions(int argc, char **argv)
> > +{
> > +       OptionsParser parser;
> > +       parser.addOption(OptCamera, OptionString,
> > +                        "Specify which camera to operate on, by id",
> > "camera",
> > +                        ArgumentRequired, "camera");
> > +       parser.addOption(OptHelp, OptionNone, "Display this help message",
> > +                        "help");
> > +
> > +       options_ = parser.parse(argc, argv);
> > +       if (!options_.valid())
> > +               return -EINVAL;
> > +
> > +       if (options_.empty() || options_.isSet(OptHelp)) {
> > +               parser.usage();
> > +               return options_.empty() ? -EINVAL : -EINTR;
> > +       }
> > +
> > +       return 0;
> > +}
> > +
> > +int main(int argc, char **argv)
> > +{
> > +       Harness harness;
> > +       return harness.exec(argc, argv) ? EXIT_FAILURE : 0;
> > +}
> > diff --git a/src/lc-compliance/meson.build b/src/lc-compliance/meson.build
> > new file mode 100644
> > index 0000000000000000..d700a307c71405b4
> > --- /dev/null
> > +++ b/src/lc-compliance/meson.build
> > @@ -0,0 +1,24 @@
> > +# SPDX-License-Identifier: CC0-1.0
> > +
> > +libevent = dependency('libevent_pthreads', required : false)
> > +
> > +if not libevent.found()
> > +    warning('libevent_pthreads not found, \'lc-compliance\' application
> > will not be compiled')
> > +    subdir_done()
> > +endif
> > +
> > +lc_compliance_sources = files([
> > +    '../cam/event_loop.cpp',
> > +    '../cam/options.cpp',
> > +    'main.cpp',
> > +    'results.cpp',
> > +    'single_stream.cpp',
> > +])
> > +
> > +lc_compliance  = executable('lc-compliance', lc_compliance_sources,
> > +                  dependencies : [
> > +                      libatomic,
> > +                      libcamera_dep,
> > +                      libevent,
> > +                  ],
> > +                  install : true)
> > diff --git a/src/lc-compliance/results.cpp b/src/lc-compliance/results.cpp
> > new file mode 100644
> > index 0000000000000000..fb4242bf49a3268b
> > --- /dev/null
> > +++ b/src/lc-compliance/results.cpp
> > @@ -0,0 +1,75 @@
> > +/* SPDX-License-Identifier: GPL-2.0-or-later */
> > +/*
> > + * Copyright (C) 2020, Google Inc.
> > + *
> > + * results.cpp - Test result aggregator
> > + */
> > +
> > +#include "results.h"
> > +
> > +#include <iostream>
> > +
> > +void Results::add(const Result &result)
> > +{
> > +       if (result.first == Pass)
> > +               passed_++;
> > +       else if (result.first == Fail)
> > +               failed_++;
> > +       else if (result.first == Skip)
> > +               skipped_++;
> > +
> > +       printResult(result);
> > +}
> > +
> > +void Results::add(Status status, const std::string &message)
> > +{
> > +       add({ status, message });
> > +}
> > +
> > +void Results::fail(const std::string &message)
> > +{
> > +       add(Fail, message);
> > +}
> > +
> > +void Results::pass(const std::string &message)
> > +{
> > +       add(Pass, message);
> > +}
> > +
> > +void Results::skip(const std::string &message)
> > +{
> > +       add(Skip, message);
> > +}
> > +
> > +int Results::summary() const
> > +{
> > +       if (failed_ + passed_ + skipped_ != planned_) {
> > +               std::cout << "Planned and executed numer of tests differ "
> > +                         << failed_ + passed_ + skipped_ << " executed "
> > +                         << planned_ << " planned" << std::endl;
> > +
> > +               return -EINVAL;
> > +       }
> > +
> > +       std::cout << planned_ << " tests executed, "
> > +                 << passed_ << " tests passed, "
> > +                 << skipped_ << " tests skipped and "
> > +                 << failed_ << " tests failed " << std::endl;
> > +
> > +       return 0;
> > +}
> > +
> > +void Results::printResult(const Result &result)
> > +{
> > +       std::string prefix;
> > +
> > +       /* \todo Make parsable as TAP. */
> > +       if (result.first == Pass)
> > +               prefix = "PASS";
> > +       else if (result.first == Fail)
> > +               prefix = "FAIL";
> > +       else if (result.first == Skip)
> > +               prefix = "SKIP";
> > +
> > +       std::cout << "- " << prefix << " - " << result.second << std::endl;
> > +}
> > diff --git a/src/lc-compliance/results.h b/src/lc-compliance/results.h
> > new file mode 100644
> > index 0000000000000000..a02fd5ab46edd62c
> > --- /dev/null
> > +++ b/src/lc-compliance/results.h
> > @@ -0,0 +1,45 @@
> > +/* SPDX-License-Identifier: GPL-2.0-or-later */
> > +/*
> > + * Copyright (C) 2020, Google Inc.
> > + *
> > + * results.h - Test result aggregator
> > + */
> > +#ifndef __LC_COMPLIANCE_RESULTS_H__
> > +#define __LC_COMPLIANCE_RESULTS_H__
> > +
> > +#include <string>
> > +
> > +class Results
> > +{
> > +public:
> > +       enum Status {
> > +               Fail,
> > +               Pass,
> > +               Skip,
> > +       };
> > +
> > +       using Result = std::pair<Status, std::string>;
> > +
> > +       Results(unsigned int planned)
> > +               : planned_(planned), passed_(0), failed_(0), skipped_(0)
> > +       {
> > +       }
> > +
> > +       void add(const Result &result);
> > +       void add(Status status, const std::string &message);
> > +       void fail(const std::string &message);
> > +       void pass(const std::string &message);
> > +       void skip(const std::string &message);
> > +
> > +       int summary() const;
> > +
> > +private:
> > +       void printResult(const Result &result);
> > +
> > +       unsigned int planned_;
> > +       unsigned int passed_;
> > +       unsigned int failed_;
> > +       unsigned int skipped_;
> > +};
> > +
> > +#endif /* __LC_COMPLIANCE_RESULTS_H__ */
> > diff --git a/src/lc-compliance/single_stream.cpp
> > b/src/lc-compliance/single_stream.cpp
> > new file mode 100644
> > index 0000000000000000..d31b6f8d06487a85
> > --- /dev/null
> > +++ b/src/lc-compliance/single_stream.cpp
> > @@ -0,0 +1,210 @@
> > +/* SPDX-License-Identifier: GPL-2.0-or-later */
> > +/*
> > + * Copyright (C) 2020, Google Inc.
> > + *
> > + * single_stream.cpp - Test a single camera stream
> > + */
> > +
> > +#include <iostream>
> > +
> > +#include "../cam/event_loop.h"
> > +#include "tests.h"
> > +
> > +using namespace libcamera;
> > +
> > +class SimpleCapture
> > +{
> > +public:
> > +       SimpleCapture(std::shared_ptr<Camera> camera)
> > +               : camera_(camera),
> > allocator_(std::make_unique<FrameBufferAllocator>(camera))
> > +       {
> > +       }
> > +
> > +       Results::Result configure(StreamRole role);
> > +       Results::Result start();
> > +       Results::Result capture(unsigned int numRequests);
> > +       Results::Result stop();
> > +
> > +private:
> > +       int queueRequest(Request *request);
> > +       void requestComplete(Request *request);
> > +
> > +       std::shared_ptr<libcamera::Camera> camera_;
> > +       std::unique_ptr<FrameBufferAllocator> allocator_;
> > +       std::unique_ptr<libcamera::CameraConfiguration> config_;
> > +
> > +       EventLoop *loop_;
> > +       unsigned int queueCount_;
> > +       unsigned int captureCount_;
> > +       unsigned int captureLimit_;
> > +};
> > +
> > +Results::Result SimpleCapture::configure(StreamRole role)
> > +{
> > +       config_ = camera_->generateConfiguration({ role });
> > +
> > +       if (config_->validate() != CameraConfiguration::Valid) {
> > +               config_.reset();
> > +               return { Results::Fail, "Configuration not valid" };
> > +       }
> > +
> > +       if (camera_->configure(config_.get())) {
> > +               config_.reset();
> > +               return { Results::Fail, "Failed to configure camera" };
> > +       }
> > +
> > +       return { Results::Pass, "Configure camera" };
> > +}
> > +
> > +Results::Result SimpleCapture::start()
> > +{
> > +       Stream *stream = config_->at(0).stream();
> > +       if (allocator_->allocate(stream) < 0)
> > +               return { Results::Fail, "Failed to allocate buffers
> > camera" };
> > +
> > +       if (camera_->start())
> > +               return { Results::Fail, "Failed to start camera" };
> > +
> > +       camera_->requestCompleted.connect(this,
> > &SimpleCapture::requestComplete);
> > +
> > +       return { Results::Pass, "Started camera" };
> > +}
> > +
> > +Results::Result SimpleCapture::capture(unsigned int numRequests)
> > +{
> > +       Stream *stream = config_->at(0).stream();
> > +       const std::vector<std::unique_ptr<FrameBuffer>> &buffers =
> > allocator_->buffers(stream);
> > +
> > +       /* No point in testing less requests then the camera depth. */
> > +       if (buffers.size() > numRequests)
> > +               return { Results::Skip, "Camera needs " +
> > std::to_string(buffers.size()) + " requests, can't test only " +
> > std::to_string(numRequests) };
> > +
> > +       queueCount_ = 0;
> > +       captureCount_ = 0;
> > +       captureLimit_ = numRequests;
> > +
> > +       /* Queue the camera recommended number of reqeuests. */
> > +       std::vector<std::unique_ptr<libcamera::Request>> requests;
> > +       for (const std::unique_ptr<FrameBuffer> &buffer :
> > allocator_->buffers(stream)) {
> > +               std::unique_ptr<Request> request =
> > camera_->createRequest();
> > +               if (!request)
> > +                       return { Results::Fail, "Can't create request" };
> > +
> > +               if (request->addBuffer(stream, buffer.get()))
> > +                       return { Results::Fail, "Can't set buffer for
> > request" };
> > +
> > +               if (queueRequest(request.get()) < 0)
> > +                       return { Results::Fail, "Failed to queue request"
> > };
> > +
> > +               requests.push_back(std::move(request));
> > +       }
> > +
> > +       /* Run capture session. */
> > +       loop_ = new EventLoop();
> > +       loop_->exec();
> > +       delete loop_;
> > +
> > +       if (captureCount_ != captureLimit_)
> > +               return { Results::Fail, "Got " +
> > std::to_string(captureCount_) + " request, wanted " +
> > std::to_string(captureLimit_) };
> > +
> > +       return { Results::Pass, "Balanced capture of " +
> > std::to_string(numRequests) + " requests" };
> > +}
> > +
> > +Results::Result SimpleCapture::stop()
> > +{
> > +       Stream *stream = config_->at(0).stream();
> > +
> > +       camera_->stop();
> > +
> > +       camera_->requestCompleted.disconnect(this,
> > &SimpleCapture::requestComplete);
> > +
> > +       allocator_->free(stream);
> > +
> > +       return { Results::Pass, "Stopped camera" };
> > +}
> > +
> > +int SimpleCapture::queueRequest(Request *request)
> > +{
> > +       queueCount_++;
> > +       if (queueCount_ > captureLimit_)
> > +               return 0;
> > +
> > +       return camera_->queueRequest(request);
> > +}
> > +
> > +void SimpleCapture::requestComplete(Request *request)
> > +{
> > +       captureCount_++;
> > +       if (captureCount_ >= captureLimit_) {
> > +               loop_->exit(0);
> > +               return;
> > +       }
> > +
> > +       request->reuse(Request::ReuseBuffers);
> > +       if (queueRequest(request))
> > +               loop_->exit(-EINVAL);
> > +}
> > +
> > +Results::Result testRequestBalance(std::shared_ptr<Camera> camera,
> > +                                  unsigned int startCycles,
> > +                                  unsigned int numRequests)
> > +{
> > +       SimpleCapture capture(camera);
> > +       Results::Result ret;
> > +
> > +       ret = capture.configure(Viewfinder);
> > +       if (ret.first != Results::Pass)
> > +               return ret;
> > +
> > +       for (unsigned int starts = 0; starts < startCycles; starts++) {
> > +               ret = capture.start();
> > +               if (ret.first != Results::Pass)
> > +                       return ret;
> > +
> > +               ret = capture.capture(numRequests);
> > +               if (ret.first != Results::Pass) {
> > +                       capture.stop();
> > +                       return ret;
> > +               }
> > +
> > +               ret = capture.stop();
> > +               if (ret.first != Results::Pass)
> > +                       return ret;
> > +       }
> > +
> > +       return { Results::Pass, "Balanced capture of " +
> > std::to_string(numRequests) + " requests with " +
> > std::to_string(startCycles) + " start cycles" };
> > +}
> > +
> > +Results testSingleStream(std::shared_ptr<Camera> camera)
> > +{
> > +       const std::vector<unsigned int> numRequests = { 1, 2, 3, 5, 8, 13,
> > 21, 34, 55, 89 };
> > +
> > +       Results results(numRequests.size() * 2);
> > +
> > +       if (!camera)
> > +               return results;
> > +
> > +       /*
> > +        * Test single capture cycles
> > +        *
> > +        * Makes sure the camera completes the exact number of requests
> > queued.
> > +        * Example failure is a camera that needs N+M requests queued to
> > +        * complete N requests to the application.
> > +        */
> > +       std::cout << "Test single capture cycles" << std::endl;
> > +       for (unsigned int num : numRequests)
> > +               results.add(testRequestBalance(camera, 1, num));
> > +
> > +       /*
> > +        * Test multiple start/stop cycles
> > +        *
> > +        * Makes sure the camera supports multiple start/stop cycles.
> > +        * Example failure is a camera that does not clean up correctly in
> > its
> > +        * error path but is only tested by single-capture applications.
> > +        */
> > +       std::cout << "Test multiple start/stop cycles" << std::endl;
> > +       for (unsigned int num : numRequests)
> > +               results.add(testRequestBalance(camera, 3, num));
> > +
> > +       return results;
> > +}
> > diff --git a/src/lc-compliance/tests.h b/src/lc-compliance/tests.h
> > new file mode 100644
> > index 0000000000000000..396605214e4b8980
> > --- /dev/null
> > +++ b/src/lc-compliance/tests.h
> > @@ -0,0 +1,16 @@
> > +/* SPDX-License-Identifier: GPL-2.0-or-later */
> > +/*
> > + * Copyright (C) 2020, Google Inc.
> > + *
> > + * tests.h - Test modules
> > + */
> > +#ifndef __LC_COMPLIANCE_TESTS_H__
> > +#define __LC_COMPLIANCE_TESTS_H__
> > +
> > +#include <libcamera/libcamera.h>
> > +
> > +#include "results.h"
> > +
> > +Results testSingleStream(std::shared_ptr<libcamera::Camera> camera);
> > +
> > +#endif /* __LC_COMPLIANCE_TESTS_H__ */
> > diff --git a/src/meson.build b/src/meson.build
> > index 4b75f05878bcb702..a8e1af7adf2ca9c8 100644
> > --- a/src/meson.build
> > +++ b/src/meson.build
> > @@ -18,6 +18,8 @@ subdir('android')
> >  subdir('libcamera')
> >  subdir('ipa')
> >
> > +subdir('lc-compliance')
> > +
> >  subdir('cam')
> >  subdir('qcam')
> >
> > --
> > 2.30.0
> >
> > _______________________________________________
> > libcamera-devel mailing list
> > libcamera-devel@lists.libcamera.org
> > https://lists.libcamera.org/listinfo/libcamera-devel
> >

Patch
diff mbox series

diff --git a/src/lc-compliance/main.cpp b/src/lc-compliance/main.cpp
new file mode 100644
index 0000000000000000..e1cbce7eac3df2bc
--- /dev/null
+++ b/src/lc-compliance/main.cpp
@@ -0,0 +1,139 @@ 
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2020, Google Inc.
+ *
+ * main.cpp - lc-compliance - The libcamera compliance tool
+ */
+
+#include <iomanip>
+#include <iostream>
+#include <string.h>
+
+#include <libcamera/libcamera.h>
+
+#include "../cam/options.h"
+#include "tests.h"
+
+using namespace libcamera;
+
+class Harness
+{
+public:
+	Harness();
+	~Harness();
+
+	int exec(int argc, char **argv);
+
+private:
+	enum {
+		OptCamera = 'c',
+		OptHelp = 'h',
+	};
+
+	int parseOptions(int argc, char **argv);
+	int init(int argc, char **argv);
+
+	OptionsParser::Options options_;
+	std::unique_ptr<CameraManager> cm_;
+	std::shared_ptr<Camera> camera_;
+};
+
+Harness::Harness()
+{
+	cm_ = std::make_unique<CameraManager>();
+}
+
+Harness::~Harness()
+{
+	if (camera_) {
+		camera_->release();
+		camera_.reset();
+	}
+
+	cm_->stop();
+}
+
+int Harness::exec(int argc, char **argv)
+{
+	int ret = init(argc, argv);
+	if (ret)
+		return ret;
+
+	std::vector<Results> results;
+
+	results.push_back(testSingleStream(camera_));
+
+	for (const Results &result : results) {
+		ret = result.summary();
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+int Harness::init(int argc, char **argv)
+{
+	int ret = parseOptions(argc, argv);
+	if (ret < 0)
+		return ret;
+
+	ret = cm_->start();
+	if (ret) {
+		std::cout << "Failed to start camera manager: "
+			  << strerror(-ret) << std::endl;
+		return ret;
+	}
+
+	if (!options_.isSet(OptCamera)) {
+		std::cout << "No camera specified, available cameras:" << std::endl;
+		for (const std::shared_ptr<Camera> &cam : cm_->cameras())
+			std::cout << "- " << cam.get()->id() << std::endl;
+		return -ENODEV;
+	}
+
+	const std::string &cameraId = options_[OptCamera];
+	camera_ = cm_->get(cameraId);
+	if (!camera_) {
+		std::cout << "Camera " << cameraId << " not found, available cameras:" << std::endl;
+		for (const std::shared_ptr<Camera> &cam : cm_->cameras())
+			std::cout << "- " << cam.get()->id() << std::endl;
+		return -ENODEV;
+	}
+
+	if (camera_->acquire()) {
+		std::cout << "Failed to acquire camera" << std::endl;
+		return -EINVAL;
+	}
+
+	std::cout << "Using camera " << cameraId << std::endl;
+
+	return 0;
+}
+
+int Harness::parseOptions(int argc, char **argv)
+{
+	OptionsParser parser;
+	parser.addOption(OptCamera, OptionString,
+			 "Specify which camera to operate on, by id", "camera",
+			 ArgumentRequired, "camera");
+	parser.addOption(OptHelp, OptionNone, "Display this help message",
+			 "help");
+
+	options_ = parser.parse(argc, argv);
+	if (!options_.valid())
+		return -EINVAL;
+
+	if (options_.empty() || options_.isSet(OptHelp)) {
+		parser.usage();
+		return options_.empty() ? -EINVAL : -EINTR;
+	}
+
+	return 0;
+}
+
+int main(int argc, char **argv)
+{
+	Harness harness;
+	return harness.exec(argc, argv) ? EXIT_FAILURE : 0;
+}
diff --git a/src/lc-compliance/meson.build b/src/lc-compliance/meson.build
new file mode 100644
index 0000000000000000..d700a307c71405b4
--- /dev/null
+++ b/src/lc-compliance/meson.build
@@ -0,0 +1,24 @@ 
+# SPDX-License-Identifier: CC0-1.0
+
+libevent = dependency('libevent_pthreads', required : false)
+
+if not libevent.found()
+    warning('libevent_pthreads not found, \'lc-compliance\' application will not be compiled')
+    subdir_done()
+endif
+
+lc_compliance_sources = files([
+    '../cam/event_loop.cpp',
+    '../cam/options.cpp',
+    'main.cpp',
+    'results.cpp',
+    'single_stream.cpp',
+])
+
+lc_compliance  = executable('lc-compliance', lc_compliance_sources,
+                  dependencies : [
+                      libatomic,
+                      libcamera_dep,
+                      libevent,
+                  ],
+                  install : true)
diff --git a/src/lc-compliance/results.cpp b/src/lc-compliance/results.cpp
new file mode 100644
index 0000000000000000..fb4242bf49a3268b
--- /dev/null
+++ b/src/lc-compliance/results.cpp
@@ -0,0 +1,75 @@ 
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2020, Google Inc.
+ *
+ * results.cpp - Test result aggregator
+ */
+
+#include "results.h"
+
+#include <iostream>
+
+void Results::add(const Result &result)
+{
+	if (result.first == Pass)
+		passed_++;
+	else if (result.first == Fail)
+		failed_++;
+	else if (result.first == Skip)
+		skipped_++;
+
+	printResult(result);
+}
+
+void Results::add(Status status, const std::string &message)
+{
+	add({ status, message });
+}
+
+void Results::fail(const std::string &message)
+{
+	add(Fail, message);
+}
+
+void Results::pass(const std::string &message)
+{
+	add(Pass, message);
+}
+
+void Results::skip(const std::string &message)
+{
+	add(Skip, message);
+}
+
+int Results::summary() const
+{
+	if (failed_ + passed_ + skipped_ != planned_) {
+		std::cout << "Planned and executed numer of tests differ "
+			  << failed_ + passed_ + skipped_ << " executed "
+			  << planned_ << " planned" << std::endl;
+
+		return -EINVAL;
+	}
+
+	std::cout << planned_ << " tests executed, "
+		  << passed_ << " tests passed, "
+		  << skipped_ << " tests skipped and "
+		  << failed_ << " tests failed " << std::endl;
+
+	return 0;
+}
+
+void Results::printResult(const Result &result)
+{
+	std::string prefix;
+
+	/* \todo Make parsable as TAP. */
+	if (result.first == Pass)
+		prefix = "PASS";
+	else if (result.first == Fail)
+		prefix = "FAIL";
+	else if (result.first == Skip)
+		prefix = "SKIP";
+
+	std::cout << "- " << prefix << " - " << result.second << std::endl;
+}
diff --git a/src/lc-compliance/results.h b/src/lc-compliance/results.h
new file mode 100644
index 0000000000000000..a02fd5ab46edd62c
--- /dev/null
+++ b/src/lc-compliance/results.h
@@ -0,0 +1,45 @@ 
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2020, Google Inc.
+ *
+ * results.h - Test result aggregator
+ */
+#ifndef __LC_COMPLIANCE_RESULTS_H__
+#define __LC_COMPLIANCE_RESULTS_H__
+
+#include <string>
+
+class Results
+{
+public:
+	enum Status {
+		Fail,
+		Pass,
+		Skip,
+	};
+
+	using Result = std::pair<Status, std::string>;
+
+	Results(unsigned int planned)
+		: planned_(planned), passed_(0), failed_(0), skipped_(0)
+	{
+	}
+
+	void add(const Result &result);
+	void add(Status status, const std::string &message);
+	void fail(const std::string &message);
+	void pass(const std::string &message);
+	void skip(const std::string &message);
+
+	int summary() const;
+
+private:
+	void printResult(const Result &result);
+
+	unsigned int planned_;
+	unsigned int passed_;
+	unsigned int failed_;
+	unsigned int skipped_;
+};
+
+#endif /* __LC_COMPLIANCE_RESULTS_H__ */
diff --git a/src/lc-compliance/single_stream.cpp b/src/lc-compliance/single_stream.cpp
new file mode 100644
index 0000000000000000..d31b6f8d06487a85
--- /dev/null
+++ b/src/lc-compliance/single_stream.cpp
@@ -0,0 +1,210 @@ 
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2020, Google Inc.
+ *
+ * single_stream.cpp - Test a single camera stream
+ */
+
+#include <iostream>
+
+#include "../cam/event_loop.h"
+#include "tests.h"
+
+using namespace libcamera;
+
+class SimpleCapture
+{
+public:
+	SimpleCapture(std::shared_ptr<Camera> camera)
+		: camera_(camera), allocator_(std::make_unique<FrameBufferAllocator>(camera))
+	{
+	}
+
+	Results::Result configure(StreamRole role);
+	Results::Result start();
+	Results::Result capture(unsigned int numRequests);
+	Results::Result stop();
+
+private:
+	int queueRequest(Request *request);
+	void requestComplete(Request *request);
+
+	std::shared_ptr<libcamera::Camera> camera_;
+	std::unique_ptr<FrameBufferAllocator> allocator_;
+	std::unique_ptr<libcamera::CameraConfiguration> config_;
+
+	EventLoop *loop_;
+	unsigned int queueCount_;
+	unsigned int captureCount_;
+	unsigned int captureLimit_;
+};
+
+Results::Result SimpleCapture::configure(StreamRole role)
+{
+	config_ = camera_->generateConfiguration({ role });
+
+	if (config_->validate() != CameraConfiguration::Valid) {
+		config_.reset();
+		return { Results::Fail, "Configuration not valid" };
+	}
+
+	if (camera_->configure(config_.get())) {
+		config_.reset();
+		return { Results::Fail, "Failed to configure camera" };
+	}
+
+	return { Results::Pass, "Configure camera" };
+}
+
+Results::Result SimpleCapture::start()
+{
+	Stream *stream = config_->at(0).stream();
+	if (allocator_->allocate(stream) < 0)
+		return { Results::Fail, "Failed to allocate buffers camera" };
+
+	if (camera_->start())
+		return { Results::Fail, "Failed to start camera" };
+
+	camera_->requestCompleted.connect(this, &SimpleCapture::requestComplete);
+
+	return { Results::Pass, "Started camera" };
+}
+
+Results::Result SimpleCapture::capture(unsigned int numRequests)
+{
+	Stream *stream = config_->at(0).stream();
+	const std::vector<std::unique_ptr<FrameBuffer>> &buffers = allocator_->buffers(stream);
+
+	/* No point in testing less requests then the camera depth. */
+	if (buffers.size() > numRequests)
+		return { Results::Skip, "Camera needs " + std::to_string(buffers.size()) + " requests, can't test only " + std::to_string(numRequests) };
+
+	queueCount_ = 0;
+	captureCount_ = 0;
+	captureLimit_ = numRequests;
+
+	/* Queue the camera recommended number of reqeuests. */
+	std::vector<std::unique_ptr<libcamera::Request>> requests;
+	for (const std::unique_ptr<FrameBuffer> &buffer : allocator_->buffers(stream)) {
+		std::unique_ptr<Request> request = camera_->createRequest();
+		if (!request)
+			return { Results::Fail, "Can't create request" };
+
+		if (request->addBuffer(stream, buffer.get()))
+			return { Results::Fail, "Can't set buffer for request" };
+
+		if (queueRequest(request.get()) < 0)
+			return { Results::Fail, "Failed to queue request" };
+
+		requests.push_back(std::move(request));
+	}
+
+	/* Run capture session. */
+	loop_ = new EventLoop();
+	loop_->exec();
+	delete loop_;
+
+	if (captureCount_ != captureLimit_)
+		return { Results::Fail, "Got " + std::to_string(captureCount_) + " request, wanted " + std::to_string(captureLimit_) };
+
+	return { Results::Pass, "Balanced capture of " + std::to_string(numRequests) + " requests" };
+}
+
+Results::Result SimpleCapture::stop()
+{
+	Stream *stream = config_->at(0).stream();
+
+	camera_->stop();
+
+	camera_->requestCompleted.disconnect(this, &SimpleCapture::requestComplete);
+
+	allocator_->free(stream);
+
+	return { Results::Pass, "Stopped camera" };
+}
+
+int SimpleCapture::queueRequest(Request *request)
+{
+	queueCount_++;
+	if (queueCount_ > captureLimit_)
+		return 0;
+
+	return camera_->queueRequest(request);
+}
+
+void SimpleCapture::requestComplete(Request *request)
+{
+	captureCount_++;
+	if (captureCount_ >= captureLimit_) {
+		loop_->exit(0);
+		return;
+	}
+
+	request->reuse(Request::ReuseBuffers);
+	if (queueRequest(request))
+		loop_->exit(-EINVAL);
+}
+
+Results::Result testRequestBalance(std::shared_ptr<Camera> camera,
+				   unsigned int startCycles,
+				   unsigned int numRequests)
+{
+	SimpleCapture capture(camera);
+	Results::Result ret;
+
+	ret = capture.configure(Viewfinder);
+	if (ret.first != Results::Pass)
+		return ret;
+
+	for (unsigned int starts = 0; starts < startCycles; starts++) {
+		ret = capture.start();
+		if (ret.first != Results::Pass)
+			return ret;
+
+		ret = capture.capture(numRequests);
+		if (ret.first != Results::Pass) {
+			capture.stop();
+			return ret;
+		}
+
+		ret = capture.stop();
+		if (ret.first != Results::Pass)
+			return ret;
+	}
+
+	return { Results::Pass, "Balanced capture of " + std::to_string(numRequests) + " requests with " + std::to_string(startCycles) + " start cycles" };
+}
+
+Results testSingleStream(std::shared_ptr<Camera> camera)
+{
+	const std::vector<unsigned int> numRequests = { 1, 2, 3, 5, 8, 13, 21, 34, 55, 89 };
+
+	Results results(numRequests.size() * 2);
+
+	if (!camera)
+		return results;
+
+	/*
+	 * Test single capture cycles
+	 *
+	 * Makes sure the camera completes the exact number of requests queued.
+	 * Example failure is a camera that needs N+M requests queued to
+	 * complete N requests to the application.
+	 */
+	std::cout << "Test single capture cycles" << std::endl;
+	for (unsigned int num : numRequests)
+		results.add(testRequestBalance(camera, 1, num));
+
+	/*
+	 * Test multiple start/stop cycles
+	 *
+	 * Makes sure the camera supports multiple start/stop cycles.
+	 * Example failure is a camera that does not clean up correctly in its
+	 * error path but is only tested by single-capture applications.
+	 */
+	std::cout << "Test multiple start/stop cycles" << std::endl;
+	for (unsigned int num : numRequests)
+		results.add(testRequestBalance(camera, 3, num));
+
+	return results;
+}
diff --git a/src/lc-compliance/tests.h b/src/lc-compliance/tests.h
new file mode 100644
index 0000000000000000..396605214e4b8980
--- /dev/null
+++ b/src/lc-compliance/tests.h
@@ -0,0 +1,16 @@ 
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2020, Google Inc.
+ *
+ * tests.h - Test modules
+ */
+#ifndef __LC_COMPLIANCE_TESTS_H__
+#define __LC_COMPLIANCE_TESTS_H__
+
+#include <libcamera/libcamera.h>
+
+#include "results.h"
+
+Results testSingleStream(std::shared_ptr<libcamera::Camera> camera);
+
+#endif /* __LC_COMPLIANCE_TESTS_H__ */
diff --git a/src/meson.build b/src/meson.build
index 4b75f05878bcb702..a8e1af7adf2ca9c8 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -18,6 +18,8 @@  subdir('android')
 subdir('libcamera')
 subdir('ipa')
 
+subdir('lc-compliance')
+
 subdir('cam')
 subdir('qcam')