From patchwork Fri Aug 28 06:57:40 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Umang Jain X-Patchwork-Id: 9412 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 E8B48BDC71 for ; Fri, 28 Aug 2020 06:57:44 +0000 (UTC) Received: from lancelot.ideasonboard.com (localhost [IPv6:::1]) by lancelot.ideasonboard.com (Postfix) with ESMTP id B47526291C; Fri, 28 Aug 2020 08:57:44 +0200 (CEST) Authentication-Results: lancelot.ideasonboard.com; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=uajain.com header.i=@uajain.com header.b="nSdsCNuy"; dkim-atps=neutral Received: from wrqvntvw.outbound-mail.sendgrid.net (wrqvntvw.outbound-mail.sendgrid.net [149.72.39.137]) by lancelot.ideasonboard.com (Postfix) with ESMTPS id CF47462912 for ; Fri, 28 Aug 2020 08:57:42 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=uajain.com; h=from:subject:in-reply-to:references:mime-version:to:cc: content-transfer-encoding:content-type; s=s1; bh=WMj9Iz2+s63Udg4LMiUKcsGdbRtB/kwzChwJ9NZre80=; b=nSdsCNuy1jdZ1hOonczdkhdwGMabnN4s8R4Dg5djgQlkDj81BhVAcuAl+UA8de9DQJne rN6gYcCWdZDVT19FawOo9RC5Snl3DbNP9K1c0n6fEMVxxiURZxv52kLIzv2zljmmuVOKq6 68ELw+Q6Ug6C+bkQElJ5KVKk2iX9MNTAk= Received: by filterdrecv-p3iad2-787bb5c9bc-cng2v with SMTP id filterdrecv-p3iad2-787bb5c9bc-cng2v-18-5F48AAE4-42 2020-08-28 06:57:40.883462972 +0000 UTC m=+46676.936842979 Received: from mail.uajain.com (unknown) by ismtpd0002p1maa1.sendgrid.net (SG) with ESMTP id oHLMjahNRPu79rz860xaVA Fri, 28 Aug 2020 06:57:40.343 +0000 (UTC) From: Umang Jain Date: Fri, 28 Aug 2020 06:57:40 +0000 (UTC) Message-Id: <20200828065727.9909-3-email@uajain.com> In-Reply-To: <20200828065727.9909-1-email@uajain.com> References: <20200828065727.9909-1-email@uajain.com> Mime-Version: 1.0 X-SG-EID: 1Q40EQ7YGir8a9gjSIAdTjhngY657NMk9ckeo4dbHZDiOpywc/L3L9rFqlwE4KPcHcG1g99dnq0SJ9KzJgHEPjqPnnLrM0z8UvL0mAr1Vjr0sVVwjEB4jQK4+wCgGGfY8aiyEX4bYwGIf8Scs7Q8hKPxF7EmRYfNmtFMZ5nf1O9zqlkpbCFHnXgtb0SL7fYBqS5AdPIrRezgdFPCK5jbYtNJ3Xt3HbulidUQdXOSDVVedLMZTGYLSxH63230NE939b7HT1CNYOrgL10sX6IIkg== To: libcamera-devel@lists.libcamera.org Subject: [libcamera-devel] [PATCH v4 2/2] android: jpeg: Support an initial set of EXIF metadata tags 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" Create a Exif object with various metadata tags set, just before the encoder starts to encode the frame. The object is passed directly as libcamera::Span<> to make sure EXIF tags can be set in a single place i.e. in CameraDevice and the encoder only has the job to write the data in the final output. Signed-off-by: Kieran Bingham Signed-off-by: Umang Jain Reviewed-by: Kieran Bingham --- src/android/camera_device.cpp | 18 +++++++- src/android/jpeg/encoder.h | 3 +- src/android/jpeg/encoder_libjpeg.cpp | 9 +++- src/android/jpeg/encoder_libjpeg.h | 3 +- src/android/jpeg/exif.cpp | 62 ++++++++++++++++++++++++++++ src/android/jpeg/exif.h | 9 ++++ 6 files changed, 100 insertions(+), 4 deletions(-) diff --git a/src/android/camera_device.cpp b/src/android/camera_device.cpp index de6f86f..54ca9c6 100644 --- a/src/android/camera_device.cpp +++ b/src/android/camera_device.cpp @@ -24,6 +24,7 @@ #include "system/graphics.h" #include "jpeg/encoder_libjpeg.h" +#include "jpeg/exif.h" using namespace libcamera; @@ -1434,7 +1435,22 @@ void CameraDevice::requestComplete(Request *request) continue; } - int jpeg_size = encoder->encode(buffer, mapped.maps()[0]); + /* Set EXIF metadata for various tags. */ + Exif exif; + /* \todo Set Make and Model from external vendor tags. */ + exif.setMake("libcamera"); + exif.setModel("cameraModel"); + exif.setOrientation(orientation_); + exif.setSize(cameraStream->size); + /* + * We set the frame's EXIF timestamp as the time of encode. + * Since the precision we need for EXIF timestamp is only one + * second, it is good enough. + */ + exif.setTimestamp(std::time(nullptr)); + exif.generate(); + + int jpeg_size = encoder->encode(buffer, mapped.maps()[0], exif.data()); if (jpeg_size < 0) { LOG(HAL, Error) << "Failed to encode stream image"; status = CAMERA3_BUFFER_STATUS_ERROR; diff --git a/src/android/jpeg/encoder.h b/src/android/jpeg/encoder.h index f9eb88e..cf26d67 100644 --- a/src/android/jpeg/encoder.h +++ b/src/android/jpeg/encoder.h @@ -18,7 +18,8 @@ public: virtual int configure(const libcamera::StreamConfiguration &cfg) = 0; virtual int encode(const libcamera::FrameBuffer *source, - const libcamera::Span &destination) = 0; + const libcamera::Span &destination, + const libcamera::Span &exifData) = 0; }; #endif /* __ANDROID_JPEG_ENCODER_H__ */ diff --git a/src/android/jpeg/encoder_libjpeg.cpp b/src/android/jpeg/encoder_libjpeg.cpp index 977538c..510613c 100644 --- a/src/android/jpeg/encoder_libjpeg.cpp +++ b/src/android/jpeg/encoder_libjpeg.cpp @@ -180,7 +180,8 @@ void EncoderLibJpeg::compressNV(const libcamera::MappedBuffer *frame) } int EncoderLibJpeg::encode(const FrameBuffer *source, - const libcamera::Span &dest) + const libcamera::Span &dest, + const libcamera::Span &exifData) { MappedFrameBuffer frame(source, PROT_READ); if (!frame.isValid()) { @@ -204,6 +205,12 @@ int EncoderLibJpeg::encode(const FrameBuffer *source, jpeg_start_compress(&compress_, TRUE); + if (exifData.size()) + /* Store Exif data in the JPEG_APP1 data block. */ + jpeg_write_marker(&compress_, JPEG_APP0 + 1, + static_cast(exifData.data()), + exifData.size()); + LOG(JPEG, Debug) << "JPEG Encode Starting:" << compress_.image_width << "x" << compress_.image_height; diff --git a/src/android/jpeg/encoder_libjpeg.h b/src/android/jpeg/encoder_libjpeg.h index aed081a..1e8df05 100644 --- a/src/android/jpeg/encoder_libjpeg.h +++ b/src/android/jpeg/encoder_libjpeg.h @@ -22,7 +22,8 @@ public: int configure(const libcamera::StreamConfiguration &cfg) override; int encode(const libcamera::FrameBuffer *source, - const libcamera::Span &destination) override; + const libcamera::Span &destination, + const libcamera::Span &exifData) override; private: void compressRGB(const libcamera::MappedBuffer *frame); diff --git a/src/android/jpeg/exif.cpp b/src/android/jpeg/exif.cpp index b49b538..3fbb117 100644 --- a/src/android/jpeg/exif.cpp +++ b/src/android/jpeg/exif.cpp @@ -157,6 +157,68 @@ int Exif::setString(ExifIfd ifd, ExifTag tag, ExifFormat format, const std::stri return 0; } +int Exif::setMake(const std::string &make) +{ + return setString(EXIF_IFD_0, EXIF_TAG_MAKE, EXIF_FORMAT_ASCII, make); +} + +int Exif::setModel(const std::string &model) +{ + return setString(EXIF_IFD_0, EXIF_TAG_MODEL, EXIF_FORMAT_ASCII, model); +} + +int Exif::setSize(Size size) +{ + setShort(EXIF_IFD_0, EXIF_TAG_IMAGE_LENGTH, size.height); + setLong(EXIF_IFD_EXIF, EXIF_TAG_PIXEL_Y_DIMENSION, size.height); + + setShort(EXIF_IFD_0, EXIF_TAG_IMAGE_WIDTH, size.width); + setLong(EXIF_IFD_EXIF, EXIF_TAG_PIXEL_X_DIMENSION, size.width); + + return 0; +} + +int Exif::setTimestamp(const time_t timestamp) +{ + char str[20]; + std::strftime(str, sizeof(str), "%Y:%m:%d %H:%M:%S", + std::localtime(×tamp)); + std::string ts(str); + int ret = -1; + + ret = setString(EXIF_IFD_0, EXIF_TAG_DATE_TIME, EXIF_FORMAT_ASCII, ts); + if (ret < 0) + return ret; + + ret = setString(EXIF_IFD_EXIF, EXIF_TAG_DATE_TIME_ORIGINAL, EXIF_FORMAT_ASCII, ts); + if (ret < 0) + return ret; + + ret = setString(EXIF_IFD_EXIF, EXIF_TAG_DATE_TIME_DIGITIZED, EXIF_FORMAT_ASCII, ts); + if (ret < 0) + return ret; + + return ret; +} + +int Exif::setOrientation(int orientation) +{ + int value = 1; + switch (orientation) { + case 90: + value = 6; + break; + case 180: + value = 3; + break; + case 270: + value = 8; + break; + } + + return setShort(EXIF_IFD_0, EXIF_TAG_ORIENTATION, value); +} + int Exif::generate() { if (exifData_) { diff --git a/src/android/jpeg/exif.h b/src/android/jpeg/exif.h index 6c10f94..f15afb9 100644 --- a/src/android/jpeg/exif.h +++ b/src/android/jpeg/exif.h @@ -9,8 +9,10 @@ #include +#include #include +#include #include class Exif @@ -19,6 +21,13 @@ public: Exif(); ~Exif(); + int setMake(const std::string &make); + int setModel(const std::string &model); + + int setOrientation(int orientation); + int setSize(libcamera::Size size); + int setTimestamp(const time_t timestamp); + libcamera::Span data() const { return { exifData_, size_ }; } int generate();