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

Author	SHA1	Message	Date
Andreas Rheinhardt	4243da4ff4	avcodec/codec_internal: Use union for FFCodec decode/encode callbacks This is possible, because every given FFCodec has to implement exactly one of these. Doing so decreases sizeof(FFCodec) and therefore decreases the size of the binary. Notice that in case of position-independent code the decrease is in .data.rel.ro, so that this translates to decreased memory consumption. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>	3 years ago
Andreas Rheinhardt	ce7dbd0481	avcodec/codec_internal: Make FFCodec.decode use AVFrame* This increases type-safety by avoiding conversions from/through void. It also avoids the boilerplate "AVFrame frame = data;" line for non-subtitle decoders. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>	3 years ago
Andreas Rheinhardt	20f9727018	avcodec/codec_internal: Add FFCodec, hide internal part of AVCodec Up until now, codec.h contains both public and private parts of AVCodec. This exposes the internals of AVCodec to users and leads them into the temptation of actually using them and forces us to forward-declare structures and types that users can't use at all. This commit changes this by adding a new structure FFCodec to codec_internal.h that extends AVCodec, i.e. contains the public AVCodec as first member; the private fields of AVCodec are moved to this structure, leaving codec.h clean. Reviewed-by: Anton Khirnov <anton@khirnov.net> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>	3 years ago
Andreas Rheinhardt	a688f3c13c	avcodec/internal: Move FF_CODEC_CAP_* to a new header codec_internal.h Also move FF_CODEC_TAGS_END as well as struct AVCodecDefault. This reduces the amount of files that have to include internal.h (which comes with quite a lot of indirect inclusions), as e.g. most encoders don't need it. It is furthemore in preparation for moving the private part of AVCodec out of the public codec.h. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>	3 years ago
Andreas Rheinhardt	a247ac640d	avcodec: Constify AVCodecs Given that the AVCodec.next pointer has now been removed, most of the AVCodecs are not modified at all any more and can therefore be made const (as this patch does); the only exceptions are the very few codecs for external libraries that have a init_static_data callback. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com> Signed-off-by: James Almer <jamrial@gmail.com>	4 years ago
Andreas Rheinhardt	4e1fee405f	avcodec: Fix invalid uses of ff_codec_open2_recursive() Normally no two codecs with FF_CODEC_CAP_INIT_THREADSAFE unset can be initialized at the same time: a mutex in avcodec_open2() ensures this. This implies that one cannot simply open a codec with a non-threadsafe init-function from the init function of a codec whose own init function is not threadsafe either as the child codec couldn't acquire the lock. ff_codec_open2_recursive() exists to get around this limitation: If the init function of the child codec to be initialized is not thread-safe, the mutex is unlocked, the child is initialized and the mutex is locked again. This of course has as a prerequisite that the parent AVCodecContext actually holds the lock, i.e. that the parent codec's init function is not thread-safe. If it is, then one can (and has to) just use avcodec_open2() directly (if the child's init function is not thread-safe, then avcodec_open2() will have to acquire the mutex itself (and potentially wait for it), so that it is perfectly fine for an otherwise thread-safe init function to open a codec with a potentially non-thread-safe init function via avcodec_open2()). Yet several of the users of ff_codec_open2_recursive() have the FF_CODEC_CAP_INIT_THREADSAFE flag set; this only worked because all the child codecs' init functions were thread-safe themselves so that ff_codec_open2_recursive() didn't touch the mutex at all. But of course the real solution to this is to directly use avcodec_open2(). Reviewed-by: Anton Khirnov <anton@khirnov.net> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>	4 years ago
Paul B Mahol	7c0b3ba7dd	avcodec: add IMM5 decoder	5 years ago