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
const AVCodecParser *	av_parser_iterate (void **opaque)
	Iterate over all registered codec parsers. More...
attribute_deprecated AVCodecParser *	av_parser_next (const AVCodecParser *c)
attribute_deprecated 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. More...
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 5025 of file avcodec.h.

Function Documentation

const AVCodecParser* av_parser_iterate

(

void **

opaque

)

Iterate over all registered codec parsers.

Parameters

opaque

a pointer where libavcodec will store the iteration state. Must point to NULL to start the iteration.

Returns

the next registered codec parser or NULL when the iteration is finished

Definition at line 103 of file parser.c.

Referenced by av_parser_init().

attribute_deprecated AVCodecParser* av_parser_next

(

const AVCodecParser *

c

)

Definition at line 93 of file parser.c.

attribute_deprecated void av_register_codec_parser

(

AVCodecParser *

parser

)

Definition at line 114 of file parser.c.

AVCodecParserContext* av_parser_init

(

int

codec_id

)

Examples:

decode_audio.c, and decode_video.c.

Definition at line 119 of file parser.c.

Referenced by avformat_find_stream_info(), ff_qsv_process_data(), flac_read_timestamp(), main(), old_flac_header(), read_frame_internal(), and remove_extradata_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	buffer size in bytes without the padding. I.e. the full buffer size is assumed to be buf_size + AV_INPUT_BUFFER_PADDING_SIZE. 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);
}

Examples:

decode_audio.c, and decode_video.c.

Definition at line 205 of file parser.c.

Referenced by ff_qsv_process_data(), flac_read_timestamp(), main(), 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 274 of file parser.c.

void av_parser_close

(

AVCodecParserContext *

s

)

Examples:

decode_audio.c, and decode_video.c.

Definition at line 309 of file parser.c.

Referenced by estimate_timings_from_pts(), ff_qsv_decode_close(), ff_read_frame_flush(), flac_read_timestamp(), free_stream(), main(), old_flac_header(), read_frame_internal(), remove_extradata_close(), and update_stream_avctx().