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

Author	SHA1	Message	Date
Philip Langdale	22b25b3ea5	avcodec: Add explicit capability flag for encoder flushing Previously, there was no way to flush an encoder such that after draining, the encoder could be used again. We generally suggested that clients teardown and replace the encoder instance in these situations. However, for at least some hardware encoders, the cost of this tear down/replace cycle is very high, which can get in the way of some use-cases - for example: segmented encoding with nvenc. To help address that use case, we added support for calling avcodec_flush_buffers() to nvenc and things worked in practice, although it was not clearly documented as to whether this should work or not. There was only one previous example of an encoder implementing the flush callback (audiotoolboxenc) and it's unclear if that was intentional or not. However, it was clear that calling avocdec_flush_buffers() on any other encoder would leave the encoder in an undefined state, and that's not great. As part of cleaning this up, this change introduces a formal capability flag for encoders that support flushing and ensures a flush call is a no-op for any other encoder. This allows client code to check if it is meaningful to call flush on an encoder before actually doing it. I have not attempted to separate the steps taken inside avcodec_flush_buffers() because it's not doing anything that's wrong for an encoder. But I did add a sanity check to reject attempts to flush a frame threaded encoder because I couldn't wrap my head around whether that code path was actually safe or not. As this combination doesn't exist today, we'll deal with it if it ever comes up.	5 years ago
Jiejun Zhang	677701c6b3	lavc/audiotoolboxenc: fix noise in encoded audio This fixes #6940 Although undocumented, AudioToolbox seems to require the data supplied by the callback (i.e. ffat_encode_callback) being unchanged until the next time the callback is called. In the old implementation, the AVBuffer backing the frame is recycled after the frame is freed, and somebody else (maybe the decoder) will write into the AVBuffer and change the data. AudioToolbox then encodes some wrong data and noise is produced. Retaining a frame reference solves this problem. Signed-off-by: James Almer <jamrial@gmail.com>	7 years ago
wm4	b945fed629	avcodec: add metadata to identify wrappers and hardware decoders Explicitly identify decoder/encoder wrappers with a common name. This saves API users from guessing by the name suffix. For example, they don't have to guess that "h264_qsv" is the h264 QSV implementation, and instead they can just check the AVCodec .codec and .wrapper_name fields. Explicitly mark AVCodec entries that are hardware decoders or most likely hardware decoders with new AV_CODEC_CAPs. The purpose is allowing API users listing hardware decoders in a more generic way. The proposed AVCodecHWConfig does not provide this information fully, because it's concerned with decoder configuration, not information about the fact whether the hardware is used or not. AV_CODEC_CAP_HYBRID exists specifically for QSV, which can have software implementations in case the hardware is not capable. Based on a patch by Philip Langdale <philipl@overt.org>. Merges Libav commit `47687a2f8a`.	7 years ago
Rick Kern	143685a42b	lavc/audiotoolboxenc: fix dropped frames on iOS AudioConverterFillComplexBuffer() doesn't always call its callback. A frame queue is used to prevent skipped audio samples. Signed-off-by: Rick Kern <kernrj@gmail.com>	9 years ago
Rodger Combs	36770d8769	lavc/audiotoolboxenc: allow setting maxrate with pre-10.9 deployment targets The build failure here is caused by the enum value not being defined, but as long as we're on a newer SDK that has it, it's safe to use it even when our deployment target is older. Setting the property will error, but we're not failing on errors there.	9 years ago
Rodger Combs	0667327f3f	lavc/audiotoolboxenc: fix iOS build	9 years ago
Rodger Combs	c820e600ea	lavc/audiotoolboxenc: fix a number of config issues - size variables were used in a confusing way - incorrect size var use led to channel layouts not being set properly - channel layouts were incorrectly mapped for >2-channel AAC - bitrates not accepted by the encoder were discarded instead of being clamped - some minor style/indentation fixes	9 years ago
Rodger Combs	7524b67817	lavc/audiotoolboxenc: remove unneeded packet metadata This isn't necessary here, and for some reason broke only multichannel AAC encoding when a channel layout tag was set.	9 years ago
Dan Dennedy	28688d7c2b	avcodec/audiotoolboxenc: Fix compile error on OS X 10.8. Fixes error "libavcodec/audiotoolboxenc.c:294:50: error: use of undeclared identifier 'kAudioCodecPropertyPacketSizeLimitForVBR'." That was added to 10.9: https://developer.apple.com/library/mac/releasenotes/General/APIDiffsMacOSX10_9/AudioUnit.html Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>	9 years ago
Rodger Combs	65cff81453	lavc: add AudioToolbox encoders Fixes trac #4828	9 years ago