Frame parsing

Data Structures
struct	AVCodecParserContext
struct	AVCodecParser

Enumerations
enum	AVPictureStructure { AV_PICTURE_STRUCTURE_UNKNOWN, AV_PICTURE_STRUCTURE_TOP_FIELD, AV_PICTURE_STRUCTURE_BOTTOM_FIELD, AV_PICTURE_STRUCTURE_FRAME }

Functions
AVCodecParser *	av_parser_next (const AVCodecParser *c)
void	av_register_codec_parser (AVCodecParser *parser)
AVCodecParserContext *	av_parser_init (int codec_id)
int	av_parser_parse2 (AVCodecParserContext *s, AVCodecContext *avctx, uint8_t **poutbuf, int *poutbuf_size, const uint8_t *buf, int buf_size, int64_t pts, int64_t dts, int64_t pos)
	Parse a packet.
int	av_parser_change (AVCodecParserContext *s, AVCodecContext *avctx, uint8_t **poutbuf, int *poutbuf_size, const uint8_t *buf, int buf_size, int keyframe)
void	av_parser_close (AVCodecParserContext *s)

Detailed Description

Enumeration Type Documentation

enum AVPictureStructure

Enumerator:

AV_PICTURE_STRUCTURE_UNKNOWN
AV_PICTURE_STRUCTURE_TOP_FIELD
AV_PICTURE_STRUCTURE_BOTTOM_FIELD
AV_PICTURE_STRUCTURE_FRAME

Definition at line 4189 of file avcodec.h.

Function Documentation

AVCodecParser* av_parser_next

(

const AVCodecParser *

c

)

Definition at line 33 of file parser.c.

void av_register_codec_parser

(

AVCodecParser *

parser

)

Definition at line 41 of file parser.c.

AVCodecParserContext* av_parser_init

(

int

codec_id

)

Definition at line 48 of file parser.c.

Referenced by avformat_find_stream_info(), flac_read_timestamp(), init(), old_flac_header(), read_frame_internal(), remove_extradata(), and transcode_init().

int av_parser_parse2	(	AVCodecParserContext *	s,
		AVCodecContext *	avctx,
		uint8_t **	poutbuf,
		int *	poutbuf_size,
		const uint8_t *	buf,
		int	buf_size,
		int64_t	pts,
		int64_t	dts,
		int64_t	pos
	)

Parse a packet.

Parameters

s	parser context.
avctx	codec context.
poutbuf	set to pointer to parsed buffer or NULL if not yet finished.
poutbuf_size	set to size of parsed buffer or zero if not yet finished.
buf	input buffer.
buf_size	input length, to signal EOF, this should be 0 (so that the last frame can be output).
pts	input presentation timestamp.
dts	input decoding timestamp.
pos	input byte position in stream.

Returns

the number of bytes of the input bitstream used.

Example:

while(in_len){
    len = av_parser_parse2(myparser, AVCodecContext, &data, &size,
                                     in_data, in_len,
                                     pts, dts, pos);
    in_data += len;
    in_len  -= len;

    if(size)
       decode_frame(data, size);
}

Definition at line 123 of file parser.c.

Referenced by decode(), flac_read_timestamp(), old_flac_header(), and parse_packet().

int av_parser_change	(	AVCodecParserContext *	s,
		AVCodecContext *	avctx,
		uint8_t **	poutbuf,
		int *	poutbuf_size,
		const uint8_t *	buf,
		int	buf_size,
		int	keyframe
	)

Returns

0 if the output buffer is a subset of the input, 1 if it is allocated and must be freed

Deprecated:

use AVBitStreamFilter

Definition at line 177 of file parser.c.

void av_parser_close

(

AVCodecParserContext *

s

)

Definition at line 210 of file parser.c.

Referenced by av_bitstream_filter_close(), estimate_timings_from_pts(), ff_free_parser_state(), ff_free_stream(), ff_read_frame_flush(), ffmpeg_cleanup(), flac_read_timestamp(), old_flac_header(), and uninit().