libavcodec/parser.c File Reference

#include "parser.h"

Go to the source code of this file.

Functions
AVCodecParser *	av_parser_next (AVCodecParser *p)
void	av_register_codec_parser (AVCodecParser *parser)
AVCodecParserContext *	av_parser_init (int codec_id)
void	ff_fetch_timestamp (AVCodecParserContext *s, int off, int remove)
	Fetches timestamps for a specific byte within the current access unit.
int	av_parser_parse (AVCodecParserContext *s, AVCodecContext *avctx, uint8_t **poutbuf, int *poutbuf_size, const uint8_t *buf, int buf_size, int64_t pts, int64_t dts)
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)
int	ff_combine_frame (ParseContext *pc, int next, const uint8_t **buf, int *buf_size)
	combines the (truncated) bitstream to a complete frame
void	ff_parse_close (AVCodecParserContext *s)
void	ff_parse1_close (AVCodecParserContext *s)
int	ff_mpeg4video_split (AVCodecContext *avctx, const uint8_t *buf, int buf_size)
Variables
static AVCodecParser *	av_first_parser = NULL

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Function Documentation

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 200 of file parser.c.

Referenced by output_packet().

void av_parser_close

(

AVCodecParserContext *

s

)

Definition at line 233 of file parser.c.

Referenced by av_bitstream_filter_close(), av_close_input_stream(), av_estimate_timings_from_pts(), ff_free_parser_state(), and ff_read_frame_flush().

AVCodecParserContext* av_parser_init

(

int

codec_id

)

Definition at line 38 of file parser.c.

Referenced by av_find_stream_info(), av_read_frame_internal(), and remove_extradata().

AVCodecParser* av_parser_next

(

AVCodecParser *

p

)

Definition at line 27 of file parser.c.

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

Parameters:

	buf	input
	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
	poutbuf	will contain a pointer to the first byte of the output frame
	poutbuf_size	will contain the length of the output frame

Returns:

the number of bytes of the input bitstream used

Example:

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

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

Deprecated:

Use av_parser_parse2() instead.

Definition at line 134 of file parser.c.

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 143 of file parser.c.

Referenced by av_parser_parse(), and av_read_frame_internal().

void av_register_codec_parser

(

AVCodecParser *

parser

)

Definition at line 32 of file parser.c.

int ff_combine_frame	(	ParseContext *	pc,
		int	next,
		const uint8_t **	buf,
		int *	buf_size
	)

combines the (truncated) bitstream to a complete frame

Returns:

-1 if no complete frame could be created, AVERROR(ENOMEM) if there was a memory allocation error

Definition at line 249 of file parser.c.

Referenced by cavsvideo_parse(), dca_parse(), dnxhd_parse(), ff_aac_ac3_parse(), ff_h263_decode_frame(), h261_parse(), h263_parse(), h264_parse(), jpeg_parse(), mlp_parse(), mpeg4video_parse(), mpeg_decode_frame(), mpegaudio_parse(), mpegvideo_parse(), pnm_parse(), and vc1_parse().

void ff_fetch_timestamp	(	AVCodecParserContext *	s,
		int	off,
		int	remove
	)

Fetches timestamps for a specific byte within the current access unit.

Parameters:

	off	byte position within the access unit
	remove	Found timestamps will be removed if set to 1, kept if set to 0.

Definition at line 84 of file parser.c.

Referenced by av_parser_parse2(), and ff_mpeg1_find_frame_end().

int ff_mpeg4video_split	(	AVCodecContext *	avctx,
		const uint8_t *	buf,
		int	buf_size
	)

Definition at line 331 of file parser.c.

void ff_parse1_close

(

AVCodecParserContext *

s

)

Definition at line 321 of file parser.c.

void ff_parse_close

(

AVCodecParserContext *

s

)

Definition at line 314 of file parser.c.

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Variable Documentation

AVCodecParser* av_first_parser = NULL [static]

Definition at line 25 of file parser.c.