FFmpeg

Commit Graph

Author	SHA1	Message	Date
Leo Izen	2548c32cc1	avcodec/png: use libavutil/csp.h for cHRM chunks The cHRM chunk is descriptive. That is, it describes the primaries that should be used to interpret the pixel data in the PNG file. This is notably different from Mastering Display Metadata, which describes which subset of the presented gamut is relevant. MDM describes a gamut and says colors outside the gamut are not required to be preserved, but it does not actually describe the gamut that the pixel data from the frame resides in. Thus, to decode a cHRM chunk present in a PNG file to Mastering Display Metadata is incorrect. This commit changes this behavior so the cHRM chunk, if present, is decoded to color metadata. For example, if the cHRM chunk describes BT.709 primaries, the resulting AVFrame will be tagged with AVCOL_PRI_BT709, as a description of its pixel data. To do this, it utilizes libavutil/csp.h, which exposes a funcction av_csp_primaries_id_from_desc, to detect which enum value accurately describes the white point and primaries represented by the cHRM chunk. This commit also changes pngenc.c to utilize the libavuitl/csp.h API, since it previously duplicated code contained in that API. Instead, taking advantage of the API that exists makes more sense. pngenc.c does properly utilize the color tags rather than incorrectly using MDM, so that required no change. Signed-off-by: Leo Izen <leo.izen@gmail.com>	2 years ago
Anton Khirnov	ccb94ec5cf	ffprobe: print AVFrame.duration	2 years ago
Niklas Haas	4a580975d4	avcodec/pngenc: support writing iCCP chunks We re-use the PNGEncContext.zstream for deflate-related operations. Other than that, the code is pretty straightforward. Special care needs to be taken to avoid writing more than 79 characters of the profile description (the maximum supported). To write the (dynamically sized) deflate-encoded data, we allocate extra space in the packet and use that directly as a scratch buffer. Modify png_write_chunk slightly to allow pre-writing the chunk contents like this. Also add a FATE transcode test to ensure that the ICC profile gets encoded correctly. Signed-off-by: Niklas Haas <git@haasn.dev>	3 years ago
James Almer	44d5e12c8f	ffprobe: remove references to frame->pkt_pts The field was removed during the last major bump. Signed-off-by: James Almer <jamrial@gmail.com>	3 years ago
Anton Khirnov	8e4390de48	tests/fate: add tests for PNG side/meta data	4 years ago
Vittorio Giovara	d24a82d2e2	ffprobe: Print color properties from show_frames Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>	7 years ago
Michael Niedermayer	073f4b93b2	fate: Update exif tests after `09ec31ce3a` Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	10 years ago
Michael Niedermayer	6d35aba167	avformat/img2dec: initialize pkt->pos for image pipes Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	10 years ago
Carl Eugen Hoyos	993a5afaad	Read aspect ratio from tiff image files.	11 years ago
Michael Niedermayer	d408d3dbc3	fate: update after `5f6c21117f` Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	11 years ago
Michael Niedermayer	1c71f185ad	avcodec/tiff_common: Improve formating of long arrays Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	11 years ago
Thilo Borgmann	78d2a781d0	fate: Add EXIF test.	11 years ago

3 Commits (21101d9eb1f26c1f1a58454919a9ef5993ae9900)