From patchwork Thu Aug 6 14:50:18 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kieran Bingham X-Patchwork-Id: 9261 Return-Path: X-Original-To: parsemail@patchwork.libcamera.org Delivered-To: parsemail@patchwork.libcamera.org Received: from lancelot.ideasonboard.com (lancelot.ideasonboard.com [92.243.16.209]) by patchwork.libcamera.org (Postfix) with ESMTPS id E4D70BD86F for ; Thu, 6 Aug 2020 14:50:26 +0000 (UTC) Received: from lancelot.ideasonboard.com (localhost [IPv6:::1]) by lancelot.ideasonboard.com (Postfix) with ESMTP id 23F4D60DFC; Thu, 6 Aug 2020 16:50:26 +0200 (CEST) Authentication-Results: lancelot.ideasonboard.com; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=ideasonboard.com header.i=@ideasonboard.com header.b="YuWhFJsP"; dkim-atps=neutral Received: from perceval.ideasonboard.com (perceval.ideasonboard.com [IPv6:2001:4b98:dc2:55:216:3eff:fef7:d647]) by lancelot.ideasonboard.com (Postfix) with ESMTPS id F1E6460495 for ; Thu, 6 Aug 2020 16:50:23 +0200 (CEST) Received: from Q.local (cpc89244-aztw30-2-0-cust3082.18-1.cable.virginm.net [86.31.172.11]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 694FE560; Thu, 6 Aug 2020 16:50:23 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1596725423; bh=uvlVs9VWG6TRorU591xgId2eFIlc5P2N9YkIsOMlTQg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=YuWhFJsP9pbNefc0fcXBuXPmii+Yvpw9KBAAPztlVJ5UyUtQdIHRwX+cYE0iRFksK ukq/hZFL5e8Bk/xursam8K/hzlkIgSR0D0FOcrTwXInCnPeTH1S5fLypxYYoFlqQoH jCom6OA7ImO5eJuxKz5c8FR22SWvCrj2RR8FUw7U= From: Kieran Bingham To: libcamera devel Date: Thu, 6 Aug 2020 15:50:18 +0100 Message-Id: <20200806145019.290878-2-kieran.bingham@ideasonboard.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200806145019.290878-1-kieran.bingham@ideasonboard.com> References: <20200805151507.227503-1-kieran.bingham@ideasonboard.com> <20200806145019.290878-1-kieran.bingham@ideasonboard.com> MIME-Version: 1.0 Subject: [libcamera-devel] [PATCH v5 1/2] android: Introduce JPEG encoding X-BeenThere: libcamera-devel@lists.libcamera.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: libcamera-devel-bounces@lists.libcamera.org Sender: "libcamera-devel" Provide an encoder interface and implement a JPEG encoder using libjpeg. Reviewed-by: Jacopo Mondi Signed-off-by: Kieran Bingham --- src/android/jpeg/encoder.h | 24 +++ src/android/jpeg/encoder_libjpeg.cpp | 218 +++++++++++++++++++++++++++ src/android/jpeg/encoder_libjpeg.h | 42 ++++++ src/android/meson.build | 5 + src/libcamera/meson.build | 2 + 5 files changed, 291 insertions(+) create mode 100644 src/android/jpeg/encoder.h create mode 100644 src/android/jpeg/encoder_libjpeg.cpp create mode 100644 src/android/jpeg/encoder_libjpeg.h diff --git a/src/android/jpeg/encoder.h b/src/android/jpeg/encoder.h new file mode 100644 index 000000000000..f9eb88e65c1d --- /dev/null +++ b/src/android/jpeg/encoder.h @@ -0,0 +1,24 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * Copyright (C) 2020, Google Inc. + * + * encoder.h - Image encoding interface + */ +#ifndef __ANDROID_JPEG_ENCODER_H__ +#define __ANDROID_JPEG_ENCODER_H__ + +#include +#include +#include + +class Encoder +{ +public: + virtual ~Encoder() {}; + + virtual int configure(const libcamera::StreamConfiguration &cfg) = 0; + virtual int encode(const libcamera::FrameBuffer *source, + const libcamera::Span &destination) = 0; +}; + +#endif /* __ANDROID_JPEG_ENCODER_H__ */ diff --git a/src/android/jpeg/encoder_libjpeg.cpp b/src/android/jpeg/encoder_libjpeg.cpp new file mode 100644 index 000000000000..977538ce6f75 --- /dev/null +++ b/src/android/jpeg/encoder_libjpeg.cpp @@ -0,0 +1,218 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * Copyright (C) 2020, Google Inc. + * + * encoder_libjpeg.cpp - JPEG encoding using libjpeg native API + */ + +#include "encoder_libjpeg.h" + +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include + +#include "libcamera/internal/formats.h" +#include "libcamera/internal/log.h" + +using namespace libcamera; + +LOG_DEFINE_CATEGORY(JPEG) + +namespace { + +struct JPEGPixelFormatInfo { + J_COLOR_SPACE colorSpace; + const PixelFormatInfo &pixelFormatInfo; + bool nvSwap; +}; + +const std::map pixelInfo{ + { formats::R8, { JCS_GRAYSCALE, PixelFormatInfo::info(formats::R8), false } }, + + { formats::RGB888, { JCS_EXT_BGR, PixelFormatInfo::info(formats::RGB888), false } }, + { formats::BGR888, { JCS_EXT_RGB, PixelFormatInfo::info(formats::BGR888), false } }, + + { formats::NV12, { JCS_YCbCr, PixelFormatInfo::info(formats::NV12), false } }, + { formats::NV21, { JCS_YCbCr, PixelFormatInfo::info(formats::NV21), true } }, + { formats::NV16, { JCS_YCbCr, PixelFormatInfo::info(formats::NV16), false } }, + { formats::NV61, { JCS_YCbCr, PixelFormatInfo::info(formats::NV61), true } }, + { formats::NV24, { JCS_YCbCr, PixelFormatInfo::info(formats::NV24), false } }, + { formats::NV42, { JCS_YCbCr, PixelFormatInfo::info(formats::NV42), true } }, +}; + +const struct JPEGPixelFormatInfo &findPixelInfo(const PixelFormat &format) +{ + static const struct JPEGPixelFormatInfo invalidPixelFormat { + JCS_UNKNOWN, PixelFormatInfo(), false + }; + + const auto iter = pixelInfo.find(format); + if (iter == pixelInfo.end()) { + LOG(JPEG, Error) << "Unsupported pixel format for JPEG encoder: " + << format.toString(); + return invalidPixelFormat; + } + + return iter->second; +} + +} /* namespace */ + +EncoderLibJpeg::EncoderLibJpeg() + : quality_(95) +{ + /* \todo Expand error handling coverage with a custom handler. */ + compress_.err = jpeg_std_error(&jerr_); + + jpeg_create_compress(&compress_); +} + +EncoderLibJpeg::~EncoderLibJpeg() +{ + jpeg_destroy_compress(&compress_); +} + +int EncoderLibJpeg::configure(const StreamConfiguration &cfg) +{ + const struct JPEGPixelFormatInfo info = findPixelInfo(cfg.pixelFormat); + if (info.colorSpace == JCS_UNKNOWN) + return -ENOTSUP; + + compress_.image_width = cfg.size.width; + compress_.image_height = cfg.size.height; + compress_.in_color_space = info.colorSpace; + + compress_.input_components = info.colorSpace == JCS_GRAYSCALE ? 1 : 3; + + jpeg_set_defaults(&compress_); + jpeg_set_quality(&compress_, quality_, TRUE); + + pixelFormatInfo_ = &info.pixelFormatInfo; + + nv_ = pixelFormatInfo_->numPlanes() == 2; + nvSwap_ = info.nvSwap; + + return 0; +} + +void EncoderLibJpeg::compressRGB(const libcamera::MappedBuffer *frame) +{ + unsigned char *src = static_cast(frame->maps()[0].data()); + /* \todo Stride information should come from buffer configuration. */ + unsigned int stride = pixelFormatInfo_->stride(compress_.image_width, 0); + + JSAMPROW row_pointer[1]; + + while (compress_.next_scanline < compress_.image_height) { + row_pointer[0] = &src[compress_.next_scanline * stride]; + jpeg_write_scanlines(&compress_, row_pointer, 1); + } +} + +/* + * Compress the incoming buffer from a supported NV format. + * This naively unpacks the semi-planar NV12 to a YUV888 format for libjpeg. + */ +void EncoderLibJpeg::compressNV(const libcamera::MappedBuffer *frame) +{ + uint8_t tmprowbuf[compress_.image_width * 3]; + + /* + * \todo Use the raw api, and only unpack the cb/cr samples to new line + * buffers. If possible, see if we can set appropriate pixel strides + * too to save even that copy. + * + * Possible hints at: + * https://sourceforge.net/p/libjpeg/mailman/message/30815123/ + */ + unsigned int y_stride = pixelFormatInfo_->stride(compress_.image_width, 0); + unsigned int c_stride = pixelFormatInfo_->stride(compress_.image_width, 1); + + unsigned int horzSubSample = 2 * compress_.image_width / c_stride; + unsigned int vertSubSample = pixelFormatInfo_->planes[1].verticalSubSampling; + + unsigned int c_inc = horzSubSample == 1 ? 2 : 0; + unsigned int cb_pos = nvSwap_ ? 1 : 0; + unsigned int cr_pos = nvSwap_ ? 0 : 1; + + const unsigned char *src = static_cast(frame->maps()[0].data()); + const unsigned char *src_c = src + y_stride * compress_.image_height; + + JSAMPROW row_pointer[1]; + row_pointer[0] = &tmprowbuf[0]; + + for (unsigned int y = 0; y < compress_.image_height; y++) { + unsigned char *dst = &tmprowbuf[0]; + + const unsigned char *src_y = src + y * compress_.image_width; + const unsigned char *src_cb = src_c + (y / vertSubSample) * c_stride + cb_pos; + const unsigned char *src_cr = src_c + (y / vertSubSample) * c_stride + cr_pos; + + for (unsigned int x = 0; x < compress_.image_width; x += 2) { + dst[0] = *src_y; + dst[1] = *src_cb; + dst[2] = *src_cr; + src_y++; + src_cb += c_inc; + src_cr += c_inc; + dst += 3; + + dst[0] = *src_y; + dst[1] = *src_cb; + dst[2] = *src_cr; + src_y++; + src_cb += 2; + src_cr += 2; + dst += 3; + } + + jpeg_write_scanlines(&compress_, row_pointer, 1); + } +} + +int EncoderLibJpeg::encode(const FrameBuffer *source, + const libcamera::Span &dest) +{ + MappedFrameBuffer frame(source, PROT_READ); + if (!frame.isValid()) { + LOG(JPEG, Error) << "Failed to map FrameBuffer : " + << strerror(frame.error()); + return frame.error(); + } + + unsigned char *destination = dest.data(); + unsigned long size = dest.size(); + + /* + * The jpeg_mem_dest will reallocate if the required size is not + * sufficient. That means the output won't be written to the correct + * buffers. + * + * \todo Implement our own custom memory destination to prevent + * reallocation and prefer failure with correct reporting. + */ + jpeg_mem_dest(&compress_, &destination, &size); + + jpeg_start_compress(&compress_, TRUE); + + LOG(JPEG, Debug) << "JPEG Encode Starting:" << compress_.image_width + << "x" << compress_.image_height; + + if (nv_) + compressNV(&frame); + else + compressRGB(&frame); + + jpeg_finish_compress(&compress_); + + return size; +} diff --git a/src/android/jpeg/encoder_libjpeg.h b/src/android/jpeg/encoder_libjpeg.h new file mode 100644 index 000000000000..aed081a46b99 --- /dev/null +++ b/src/android/jpeg/encoder_libjpeg.h @@ -0,0 +1,42 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * Copyright (C) 2020, Google Inc. + * + * encoder_libjpeg.h - JPEG encoding using libjpeg + */ +#ifndef __ANDROID_JPEG_ENCODER_LIBJPEG_H__ +#define __ANDROID_JPEG_ENCODER_LIBJPEG_H__ + +#include "encoder.h" + +#include "libcamera/internal/buffer.h" +#include "libcamera/internal/formats.h" + +#include + +class EncoderLibJpeg : public Encoder +{ +public: + EncoderLibJpeg(); + ~EncoderLibJpeg(); + + int configure(const libcamera::StreamConfiguration &cfg) override; + int encode(const libcamera::FrameBuffer *source, + const libcamera::Span &destination) override; + +private: + void compressRGB(const libcamera::MappedBuffer *frame); + void compressNV(const libcamera::MappedBuffer *frame); + + struct jpeg_compress_struct compress_; + struct jpeg_error_mgr jerr_; + + unsigned int quality_; + + const libcamera::PixelFormatInfo *pixelFormatInfo_; + + bool nv_; + bool nvSwap_; +}; + +#endif /* __ANDROID_JPEG_ENCODER_LIBJPEG_H__ */ diff --git a/src/android/meson.build b/src/android/meson.build index 822cad621f01..f7b81a498499 100644 --- a/src/android/meson.build +++ b/src/android/meson.build @@ -6,12 +6,17 @@ android_hal_sources = files([ 'camera_device.cpp', 'camera_metadata.cpp', 'camera_ops.cpp', + 'jpeg/encoder_libjpeg.cpp', ]) android_camera_metadata_sources = files([ 'metadata/camera_metadata.c', ]) +android_deps = [ + dependency('libjpeg'), +] + android_camera_metadata = static_library('camera_metadata', android_camera_metadata_sources, include_directories : android_includes) diff --git a/src/libcamera/meson.build b/src/libcamera/meson.build index bada45bcb11e..af2f3d950be6 100644 --- a/src/libcamera/meson.build +++ b/src/libcamera/meson.build @@ -125,6 +125,8 @@ if get_option('android') libcamera_sources += android_hal_sources includes += android_includes libcamera_link_with += android_camera_metadata + + libcamera_deps += android_deps endif # We add '/' to the build_rpath as a 'safe' path to act as a boolean flag.