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

Author	SHA1	Message	Date
Andreas Rheinhardt	b468ddc75d	avformat/matroskaenc: Don't waste bytes to Write Tag length fields This is possible by using a dynamic buffer to write them; said dynamic buffer is (re)used and reset as appropriate. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>	2 years ago
Andreas Rheinhardt	e8065c7def	avformat/matroskaenc: Don't waste bytes on Video element length fields Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>	3 years ago
Andreas Rheinhardt	750631b098	avformat/matroskaenc: Pass dispositions through unchanged by default Up until now, the Matroska muxer did not use the dispositions it is given as-is; instead it by default overrode the disposition of the first track of a kind (audio, video, subtitles) if no track of this kind has the default disposition set. And up until recently, it also enforced by default that no more than one track of each kind be marked as default. The rationale for the former is that there are lots of containers which lack the concept of default streams, so that it is not uncommon for no stream to be marked as default at all; the rationale for the latter was that up until recently, it was dubious whether the Matroska specification allowed more than one default stream for track type (e.g. mkvmerge disallowed it). It was this point which led to the implementation of the above mentioned behaviour inspired by mkvmerge. Yet the Matroska specifications have changed and now explicitly allow to set more than one track of each type as default, so that the main reason of not using the dispositions as-is was rendered moot. Therefore this commit changes the default to pass the disposition through. The matroska-mpegts-remux FATE-test has been updated to still use the old "infer" mode so that it is still covered by FATE; the matroska-zero-length-block test has also been updated to cover the infer_no_subs mode. The references for lots of other FATE tests needed to be updated because of a newly added FlagDefault element with value zero (whereas a FlagDefault with value 1 needn't be coded at all, as it coincided with the default value of said element). Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>	3 years ago
Fei Wang	47be5a5056	avcodec: add AV1 hardware accelerated decoder This AV1 decoder is currently only used for hardware accelerated decoding. It can be extended into a native decoder in the future, so set its name to "av1" and temporarily give it the lowest priority in the codec list. Signed-off-by: Fei Wang <fei.w.wang@intel.com> Signed-off-by: James Almer <jamrial@gmail.com>	4 years ago
Andreas Rheinhardt	4ebfc13c33	avformat/matroskaenc: Don't ignore tags of chapters written late The Matroska muxer writes the Chapters early when chapters were already available when writing the header; in this case any tags pertaining to these chapters get written, too. Yet if no chapters had been supplied before writing the header, Chapters can also be written when writing the trailer if any are supplied. Tags belonging to these chapters were up until now completely ignored. This commit changes this: Writing the tags belonging to chapters has been moved to mkv_write_chapters(). If mkv_write_tags() has not been called yet (i.e. when chapters are written when writing the header), the AVIOContext for writing the ordinary Tags element is used, but not output, as this is left to mkv_write_tags() in order to only write one Tags element. Yet if mkv_write_tags() has already been called, mkv_write_chapters() will output a Tags element of its own which only contains the tags for chapters. When chapters are available initially, the corresponding tags will now be the first tags in the Tags element; but the ordering of tags in Tags is irrelevant anyway. This commit also makes chapter_id_offset local to mkv_write_chapters() as it is used only there and not reused at all. Potentially writing a second Tags element means that the maximum number of SeekHead entries had to be incremented. All the changes to FATE result from the ensuing increase in the amount of space reserved for the SeekHead (21 bytes more). Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>	5 years ago
Andreas Rheinhardt	5b6e164b4b	avformat/matroskaenc: Don't waste bytes on length fields Several EBML Master elements for which a good upper bound of the final length was available were nevertheless written without giving an upper bound of the final length to start_ebml_master(), so that their length fields were eight bytes long. This has been changed. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>	5 years ago
Andreas Rheinhardt	ccadd00a4a	avformat/matroskaenc: Make output more deterministic Using random values for TrackUID and FileUID (as happens when the AVFMT_FLAG_BITEXACT flag is not set) has the obvious downside of making the output indeterministic. This commit mitigates this by writing the potentially random values with a fixed size of eight byte, even if their actual values would fit into less than eight bytes. This ensures that even in non-bitexact mode, the differences between two files generated with the same settings are restricted to a few bytes in the header. (Namely the SegmentUID, the TrackUIDs (in Tracks as well as when referencing them via TagTrackUID), the FileUIDs (in Attachments as well as in TagAttachmentUID) as well as the CRC-32 checksums of the Info, Tracks, Attachments and Tags level-1-elements.) Without this patch, there might be an offset/a size difference between two such files. The FATE-tests had to be updated because the fixed-sized UIDs are also used in bitexact mode. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>	5 years ago
Andreas Rheinhardt	dc2f6b54ac	avformat/matroskaenc: Avoid allocations for SeekHead Up until `e7ddafd5`, the Matroska muxer wrote two SeekHeads: One at the beginning referencing the main level 1 elements (i.e. not the Clusters) and one at the end, referencing the Clusters. This second SeekHead was useless and has therefore been removed. Yet the SeekHead-related functions and structures are still geared towards this usecase: They are built around an allocated array of variable size that gets reallocated every time an element is added to it although the maximum number of Seek entries is a small compile-time constant, so that one should rather include the array in the SeekHead structure itself; and said structure should be contained in the MatroskaMuxContext instead of being allocated separately. The earlier code reserved space for a SeekHead with 10 entries, although we currently write at most 6. Reducing said number implied that every Matroska/Webm file will be 84 bytes smaller and required to adapt several FATE tests; furthermore, the reserved amount overestimated the amount needed for for the SeekHead's length field and how many bytes need to be reserved to write a EBML Void element, bringing the total reduction to 89 bytes. This also fixes a potential segfault: If !mkv->is_live and if the AVIOContext is initially unseekable when writing the header, the SeekHead is already written when writing the header and this used to free the SeekHead-related structures that have been allocated. But if the AVIOContext happens to be seekable when writing the trailer, it will be attempted to write the SeekHead again which will lead to segfaults because the corresponding structures have already been freed. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>	5 years ago
James Almer	609dfb4057	fate/lavf-container: add an AV1 in Matroska muxing test Signed-off-by: James Almer <jamrial@gmail.com>	5 years ago