Chiebot-Mirror/FFmpeg - FFmpeg - Gitea: Git with a cup of tea

Author	SHA1	Message	Date
Niklas Haas	a9023377b2	avutil/film_grain_params: add av_film_grain_params_select() Common utility function that can be used by all codecs to select the right (any valid) film grain parameter set. In particular, this is useful for AFGS1, which has support for multiple parameters. However, it also performs parameter validation for H274.	8 months ago
Niklas Haas	35d2960dcd	avutil/film_grain_params: add metadata to common struct This is needed for AV1 film grain as well, when using AFGS1 streams. Also add extra width/height and subsampling information, which AFGS1 cares about, as part of the same API bump. (And in principle, H274 should also expose this information, since it is needed downstream to correctly adjust the chroma grain frequency to the subsampling ratio) Deprecate the equivalent H274-exclusive fields. To avoid breaking ABI, add the new fields after the union; but with enough of a paper trail to hopefully re-order them on the next bump.	8 months ago
Niklas Haas	cf37c3fb6c	avcodec/h264_slice: compute and export film grain seed From SMPTE RDD 5-2006, the grain seed is to be computed from the following definition of `pic_offset`: > When decoding H.264 \| MPEG-4 AVC bitstreams, pic_offset is defined as > follows: > - pic_offset = PicOrderCnt(CurrPic) + (PicOrderCnt_offset << 5) > where: > - PicOrderCnt(CurrPic) is the picture order count of the current frame, > which shall be derived from [the video stream]. > > - PicOrderCnt_offset is set to idr_pic_id on IDR frames. idr_pic_id > shall be read from the slice header of [the video stream]. On non-IDR I > frames, PicOrderCnt_offset is set to 0. A frame shall be classified as I > frame when all its slices are I slices, which may be optionally > designated by setting primary_pic_type to 0 in the access delimiter NAL > unit. Otherwise, PicOrderCnt_offset it not changed. PicOrderCnt_offset is > updated in decoding order. Co-authored-by: James Almer <jamrial@gmail.com> Signed-off-by: Niklas Haas <git@haasn.dev> Signed-off-by: James Almer <jamrial@gmail.com>	3 years ago
James Almer	e3b5ff17c2	avutil/film_grain_params: add support for H.274 Film Grain Characteristics Used by codecs like H.264, HEVC, and VVC. Signed-off-by: James Almer <jamrial@gmail.com>	3 years ago
James Almer	53b4550bdd	avutil/film_grain_params: fix doxy for ar_coeff_* fields Signed-off-by: James Almer <jamrial@gmail.com>	4 years ago
James Almer	ee61d4dc68	avutil/film_grain_params: add more details to some AVFilmGrainAOMParams fields Signed-off-by: James Almer <jamrial@gmail.com>	4 years ago
Lynne	2ba04670c3	lavu/film_grain_params: fix typo in type enum Ref: xkcd #1015	4 years ago
Lynne	4f9ee87253	libavutil: introduce AVFilmGrainParams side data This patch introduces a new frame side data type AVFilmGrainParams for use with video codecs which support it. It can save a lot of memory used for duplicate processed reference frames and reduce copies when applying film grain during presentation.	4 years ago