[libcamera-devel] [PATCH v4 5/8] android: Set result metadata and EXIF fields based on request metadata
Laurent Pinchart
laurent.pinchart at ideasonboard.com
Mon Jan 25 10:54:07 CET 2021
Hi Paul,
Thank you for the patch.
On Mon, Jan 25, 2021 at 04:14:41PM +0900, Paul Elder wrote:
> Set the following android result metadata:
> - ANDROID_LENS_FOCAL_LENGTH
> - ANDROID_LENS_APERTURE
> - ANDROID_JPEG_GPS_TIMESTAMP
> - ANDROID_JPEG_GPS_COORDINATES
> - ANDROID_JPEG_GPS_PROCESSING_METHOD
> - ANDROID_JPEG_SIZE
> - ANDROID_JPEG_QUALITY
> - ANDROID_JPEG_ORIENTATION
>
> And the following EXIF fields:
> - GPSDatestamp
> - GPSTimestamp
> - GPSLocation
> - GPSLatitudeRef
> - GPSLatitude
> - GPSLongitudeRef
> - GPSLongitude
> - GPSAltitudeRef
> - GPSAltitude
> - GPSProcessingMethod
> - FocalLength
> - ExposureTime
> - FNumber
> - ISO
> - Flash
> - WhiteBalance
> - SubsecTime
> - SubsecTimeOriginal
> - SubsecTimeDigitized
>
> Based on android request metadata.
>
> This allows the following CTS tests to pass:
> - android.hardware.camera2.cts.StillCaptureTest#testFocalLengths
> - android.hardware.camera2.cts.StillCaptureTest#testJpegExif
>
> Signed-off-by: Paul Elder <paul.elder at ideasonboard.com>
> Reviewed-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
>
> ---
> Changes in v4:
> - remove unused variable
> - move android JPEG thumbnail tags allocation to the thumbnail patch
> - move setting the timestamp with subsec to the patch that adds set
> subsec to timestamp ("android: jpeg: exif: Add functions for
> setting various values")
> - group setting GPS-related tags
>
> Changes in v3:
> - fix metadata entries and byte count
> - fix gps processing method string truncation
> - move thumbnail handling to a different patch
>
> Changes in v2:
> - break out processControls and thumbnailer configuration into
> different
> patches
> - fix android metadata entry number and size
> - other small changes
> ---
> src/android/camera_device.cpp | 19 +++++++-
> src/android/camera_stream.cpp | 7 ++-
> src/android/camera_stream.h | 4 +-
> src/android/jpeg/post_processor_jpeg.cpp | 62 +++++++++++++++++++-----
> src/android/jpeg/post_processor_jpeg.h | 3 +-
> src/android/post_processor.h | 3 +-
> 6 files changed, 80 insertions(+), 18 deletions(-)
>
> diff --git a/src/android/camera_device.cpp b/src/android/camera_device.cpp
> index 592e2d43..2cd3c8a1 100644
> --- a/src/android/camera_device.cpp
> +++ b/src/android/camera_device.cpp
> @@ -1688,6 +1688,7 @@ int CameraDevice::processCaptureRequest(camera3_capture_request_t *camera3Reques
> * The descriptor and the associated memory reserved here are freed
> * at request complete time.
> */
> + /* \todo Handle null request settings */
> Camera3RequestDescriptor *descriptor =
> new Camera3RequestDescriptor(camera_.get(), camera3Request);
>
> @@ -1817,6 +1818,7 @@ void CameraDevice::requestComplete(Request *request)
> }
>
> int ret = cameraStream->process(*buffer, &mapped,
> + descriptor->settings_,
> resultMetadata.get());
> if (ret) {
> status = CAMERA3_BUFFER_STATUS_ERROR;
> @@ -1913,14 +1915,19 @@ CameraDevice::getResultMetadata(Camera3RequestDescriptor *descriptor,
>
> /*
> * \todo Keep this in sync with the actual number of entries.
> - * Currently: 33 entries, 75 bytes
> + * Currently: 38 entries, 147 bytes
> *
> * Reserve more space for the JPEG metadata set by the post-processor.
> * Currently: ANDROID_JPEG_SIZE (int32_t), ANDROID_JPEG_QUALITY (byte),
> + * ANDROID_JPEG_GPS_COORDINATES (double x 3) = 24 bytes
> + * ANDROID_JPEG_GPS_PROCESSING_METHOD (byte x 32) = 32 bytes
Should this be 40, given the encoding prefix
> + * ANDROID_JPEG_GPS_TIMESTAMP (int64) = 8 bytes
> * ANDROID_JPEG_ORIENTATION (int32_t) = 3 entries, 9 bytes.
> + * ANDROID_LENS_APERTURE (float) = 4 bytes
> + * ANDROID_LENS_FOCAL_LENGTH (float) = 4 bytes
> */
> std::unique_ptr<CameraMetadata> resultMetadata =
> - std::make_unique<CameraMetadata>(33, 75);
> + std::make_unique<CameraMetadata>(38, 147);
> if (!resultMetadata->isValid()) {
> LOG(HAL, Error) << "Failed to allocate static metadata";
> return nullptr;
> @@ -1985,6 +1992,14 @@ CameraDevice::getResultMetadata(Camera3RequestDescriptor *descriptor,
> value = ANDROID_FLASH_STATE_UNAVAILABLE;
> resultMetadata->addEntry(ANDROID_FLASH_STATE, &value, 1);
>
> + camera_metadata_ro_entry_t entry;
> + int ret = descriptor->settings_.getEntry(ANDROID_LENS_APERTURE, &entry);
> + if (ret)
> + resultMetadata->addEntry(ANDROID_LENS_APERTURE, entry.data.f, 1);
> +
> + float focal_length = 1.0;
> + resultMetadata->addEntry(ANDROID_LENS_FOCAL_LENGTH, &focal_length, 1);
> +
> value = ANDROID_LENS_STATE_STATIONARY;
> resultMetadata->addEntry(ANDROID_LENS_STATE, &value, 1);
>
> diff --git a/src/android/camera_stream.cpp b/src/android/camera_stream.cpp
> index dba351a4..4c8020e5 100644
> --- a/src/android/camera_stream.cpp
> +++ b/src/android/camera_stream.cpp
> @@ -96,12 +96,15 @@ int CameraStream::configure()
> }
>
> int CameraStream::process(const libcamera::FrameBuffer &source,
> - MappedCamera3Buffer *dest, CameraMetadata *metadata)
> + MappedCamera3Buffer *dest,
> + const CameraMetadata &requestMetadata,
> + CameraMetadata *resultMetadata)
> {
> if (!postProcessor_)
> return 0;
>
> - return postProcessor_->process(source, dest->maps()[0], metadata);
> + return postProcessor_->process(source, dest->maps()[0],
> + requestMetadata, resultMetadata);
> }
>
> FrameBuffer *CameraStream::getBuffer()
> diff --git a/src/android/camera_stream.h b/src/android/camera_stream.h
> index cc9d5470..298ffbf6 100644
> --- a/src/android/camera_stream.h
> +++ b/src/android/camera_stream.h
> @@ -119,7 +119,9 @@ public:
>
> int configure();
> int process(const libcamera::FrameBuffer &source,
> - MappedCamera3Buffer *dest, CameraMetadata *metadata);
> + MappedCamera3Buffer *dest,
> + const CameraMetadata &requestMetadata,
> + CameraMetadata *resultMetadata);
> libcamera::FrameBuffer *getBuffer();
> void putBuffer(libcamera::FrameBuffer *buffer);
>
> diff --git a/src/android/jpeg/post_processor_jpeg.cpp b/src/android/jpeg/post_processor_jpeg.cpp
> index c29cb352..10c71a47 100644
> --- a/src/android/jpeg/post_processor_jpeg.cpp
> +++ b/src/android/jpeg/post_processor_jpeg.cpp
> @@ -82,17 +82,26 @@ void PostProcessorJpeg::generateThumbnail(const FrameBuffer &source,
>
> int PostProcessorJpeg::process(const FrameBuffer &source,
> Span<uint8_t> destination,
> - CameraMetadata *metadata)
> + const CameraMetadata &requestMetadata,
> + CameraMetadata *resultMetadata)
> {
> if (!encoder_)
> return 0;
>
> + camera_metadata_ro_entry_t entry;
> + int ret;
> +
> /* 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(cameraDevice_->orientation());
> + exif.setMake(cameraDevice_->cameraMake());
> + exif.setModel(cameraDevice_->cameraModel());
> +
> + ret = requestMetadata.getEntry(ANDROID_JPEG_ORIENTATION, &entry);
> +
> + const uint32_t jpegOrientation = ret ? *entry.data.i32 : 0;
> + resultMetadata->addEntry(ANDROID_JPEG_ORIENTATION, &jpegOrientation, 1);
> + exif.setOrientation(jpegOrientation);
> +
> exif.setSize(streamSize_);
> /*
> * We set the frame's EXIF timestamp as the time of encode.
> @@ -101,6 +110,38 @@ int PostProcessorJpeg::process(const FrameBuffer &source,
> */
> exif.setTimestamp(std::time(nullptr), std::chrono::milliseconds(0));
>
> + exif.setExposureTime(0);
> + ret = requestMetadata.getEntry(ANDROID_LENS_APERTURE, &entry);
> + if (ret)
> + exif.setAperture(*entry.data.f);
> + exif.setISO(100);
> + exif.setFlash(Exif::Flash::FlashNotPresent);
> + exif.setWhiteBalance(Exif::WhiteBalance::Auto);
> +
> + exif.setFocalLength(1.0);
> +
> + ret = requestMetadata.getEntry(ANDROID_JPEG_GPS_TIMESTAMP, &entry);
> + if (ret) {
> + exif.setGPSDateTimestamp(*entry.data.i64);
> + resultMetadata->addEntry(ANDROID_JPEG_GPS_TIMESTAMP,
> + entry.data.i64, 1);
> + }
> +
> + ret = requestMetadata.getEntry(ANDROID_JPEG_GPS_COORDINATES, &entry);
> + if (ret) {
> + exif.setGPSLocation(entry.data.d);
> + resultMetadata->addEntry(ANDROID_JPEG_GPS_COORDINATES,
> + entry.data.d, 3);
> + }
> +
> + ret = requestMetadata.getEntry(ANDROID_JPEG_GPS_PROCESSING_METHOD, &entry);
> + if (ret) {
> + std::string method(entry.data.u8, entry.data.u8 + entry.count);
> + exif.setGPSMethod(method);
> + resultMetadata->addEntry(ANDROID_JPEG_GPS_PROCESSING_METHOD,
> + entry.data.u8, entry.count);
> + }
> +
> std::vector<unsigned char> thumbnail;
> generateThumbnail(source, &thumbnail);
> if (!thumbnail.empty())
> @@ -135,13 +176,12 @@ int PostProcessorJpeg::process(const FrameBuffer &source,
> blob->jpeg_size = jpeg_size;
>
> /* Update the JPEG result Metadata. */
> - metadata->addEntry(ANDROID_JPEG_SIZE, &jpeg_size, 1);
> -
> - const uint32_t jpeg_quality = 95;
> - metadata->addEntry(ANDROID_JPEG_QUALITY, &jpeg_quality, 1);
> + resultMetadata->addEntry(ANDROID_JPEG_SIZE, &jpeg_size, 1);
>
> - const uint32_t jpeg_orientation = 0;
> - metadata->addEntry(ANDROID_JPEG_ORIENTATION, &jpeg_orientation, 1);
> + /* \todo Configure JPEG encoder with this */
> + ret = requestMetadata.getEntry(ANDROID_JPEG_QUALITY, &entry);
> + const uint32_t jpegQuality = ret ? *entry.data.u8 : 95;
s/uint32_t/uint8_t/ or the next call won't work on big endian platforms.
> + resultMetadata->addEntry(ANDROID_JPEG_QUALITY, &jpegQuality, 1);
>
> return 0;
> }
> diff --git a/src/android/jpeg/post_processor_jpeg.h b/src/android/jpeg/post_processor_jpeg.h
> index 5afa831c..d721d1b9 100644
> --- a/src/android/jpeg/post_processor_jpeg.h
> +++ b/src/android/jpeg/post_processor_jpeg.h
> @@ -26,7 +26,8 @@ public:
> const libcamera::StreamConfiguration &outcfg) override;
> int process(const libcamera::FrameBuffer &source,
> libcamera::Span<uint8_t> destination,
> - CameraMetadata *metadata) override;
> + const CameraMetadata &requestMetadata,
> + CameraMetadata *resultMetadata) override;
>
> private:
> void generateThumbnail(const libcamera::FrameBuffer &source,
> diff --git a/src/android/post_processor.h b/src/android/post_processor.h
> index e0f91880..bda93bb4 100644
> --- a/src/android/post_processor.h
> +++ b/src/android/post_processor.h
> @@ -22,7 +22,8 @@ public:
> const libcamera::StreamConfiguration &outCfg) = 0;
> virtual int process(const libcamera::FrameBuffer &source,
> libcamera::Span<uint8_t> destination,
> - CameraMetadata *metadata) = 0;
> + const CameraMetadata &requestMetadata,
> + CameraMetadata *resultMetadata) = 0;
> };
>
> #endif /* __ANDROID_POST_PROCESSOR_H__ */
--
Regards,
Laurent Pinchart
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