FFmpeg

Commit Graph

Author	SHA1	Message	Date
Anton Khirnov	9200514ad8	lavf: replace AVStream.codec with AVStream.codecpar Currently, AVStream contains an embedded AVCodecContext instance, which is used by demuxers to export stream parameters to the caller and by muxers to receive stream parameters from the caller. It is also used internally as the codec context that is passed to parsers. In addition, it is also widely used by the callers as the decoding (when demuxer) or encoding (when muxing) context, though this has been officially discouraged since Libav 11. There are multiple important problems with this approach: - the fields in AVCodecContext are in general one of * stream parameters * codec options * codec state However, it's not clear which ones are which. It is consequently unclear which fields are a demuxer allowed to set or a muxer allowed to read. This leads to erratic behaviour depending on whether decoding or encoding is being performed or not (and whether it uses the AVStream embedded codec context). - various synchronization issues arising from the fact that the same context is used by several different APIs (muxers/demuxers, parsers, bitstream filters and encoders/decoders) simultaneously, with there being no clear rules for who can modify what and the different processes being typically delayed with respect to each other. - avformat_find_stream_info() making it necessary to support opening and closing a single codec context multiple times, thus complicating the semantics of freeing various allocated objects in the codec context. Those problems are resolved by replacing the AVStream embedded codec context with a newly added AVCodecParameters instance, which stores only the stream parameters exported by the demuxers or read by the muxers.	9 years ago
Luca Barbato	ce70f28a17	avpacket: Replace av_free_packet with av_packet_unref `av_packet_unref` matches the AVFrame ref-counted API and can be used as a drop in replacement. Deprecate `av_free_packet`.	9 years ago
Vittorio Giovara	059a934806	lavc: Consistently prefix input buffer defines Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>	10 years ago
Andreas Cadhalpun	c73c3c34fe	avformat/adxdec: set avctx->channels in adx_read_header It is used in adx_read_packet, which currently depends on the decoder/parser setting this value between reading the file header and demuxing the first packet. Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com> Signed-off-by: Anton Khirnov <anton@khirnov.net>	10 years ago
Anton Khirnov	d5cf5afabb	adxdec: get rid of an avpriv function The only thing the demuxer needs is the sample rate to set the timebase, which can be simply read with AV_RB32.	11 years ago
Anton Khirnov	36ef5369ee	Replace all CODEC_ID_* with AV_CODEC_ID_*	13 years ago
Anton Khirnov	f7fe41a04f	lavf: rename AVInputFormat.value to raw_codec_id. It's only used by raw demuxers for storing the codec id.	13 years ago
Anton Khirnov	6e9651d106	lavf: remove AVFormatParameters from AVFormatContext.read_header signature	13 years ago
Justin Ruggles	99baf2c7d0	adx: add AVFMT_GENERIC_INDEX to demuxer flags. fixes seeking	13 years ago
Anton Khirnov	c3f9ebf743	lavf: make av_set_pts_info private. It's supposed to be called only from (de)muxers.	13 years ago
Justin Ruggles	9d2dd356c2	adx: rename ff_adx_decode_header() to avpriv_adx_decode_header() It is used by the ADX decoder, and therefore needs to be exported in order to work with shared libs.	13 years ago
Justin Ruggles	a17c3c7d15	avformat: add CRI ADX format demuxer	13 years ago

12 Commits (f0a978a519167e5ad5dd479245a7b5da77488d43)