dca_parser.c File Reference

#include "dca.h"
#include "dca_exss.h"
#include "dca_syncwords.h"
#include "get_bits.h"
#include "parser.h"

Go to the source code of this file.

Data Structures
struct	DCAParseContext

Macros
#define	IS_CORE_MARKER(state)
#define	IS_EXSS_MARKER(state)   ((state & 0xFFFFFFFF) == DCA_SYNCWORD_SUBSTREAM)
#define	IS_MARKER(state)   (IS_CORE_MARKER(state) || IS_EXSS_MARKER(state))
#define	CORE_MARKER(state)   ((state >> 16) & 0xFFFFFFFF)
#define	EXSS_MARKER(state)   (state & 0xFFFFFFFF)
#define	STATE_LE(state)   (((state & 0xFF00FF00) >> 8) | ((state & 0x00FF00FF) << 8))
#define	STATE_14(state)   (((state & 0x3FFF0000) >> 8) | ((state & 0x00003FFF) >> 6))
#define	CORE_FRAMESIZE(state)   (((state >> 4) & 0x3FFF) + 1)
#define	EXSS_FRAMESIZE(state)

Functions
static int	dca_find_frame_end (DCAParseContext *pc1, const uint8_t *buf, int buf_size)
	Find the end of the current frame in the bitstream. More...
static av_cold int	dca_parse_init (AVCodecParserContext *s)
static int	dca_parse_params (DCAParseContext *pc1, const uint8_t *buf, int buf_size, int *duration, int *sample_rate)
static int	dca_parse (AVCodecParserContext *s, AVCodecContext *avctx, const uint8_t **poutbuf, int *poutbuf_size, const uint8_t *buf, int buf_size)

Variables
AVCodecParser	ff_dca_parser

Macro Definition Documentation

#define IS_CORE_MARKER

(

state

)

Value:

(((state & 0xFFFFFFFFF0FF) == (((uint64_t)DCA_SYNCWORD_CORE_14B_LE << 16) | 0xF007)) || \
     ((state & 0xFFFFFFFFFFF0) == (((uint64_t)DCA_SYNCWORD_CORE_14B_BE << 16) | 0x07F0)) || \
     ((state & 0xFFFFFFFF00FC) == (((uint64_t)DCA_SYNCWORD_CORE_LE     << 16) | 0x00FC)) || \
     ((state & 0xFFFFFFFFFC00) == (((uint64_t)DCA_SYNCWORD_CORE_BE     << 16) | 0xFC00)))

Definition at line 41 of file dca_parser.c.

#define IS_EXSS_MARKER

(

state

)

((state & 0xFFFFFFFF) == DCA_SYNCWORD_SUBSTREAM)

Definition at line 47 of file dca_parser.c.

Referenced by dca_find_frame_end().

#define IS_MARKER

(

state

)

(IS_CORE_MARKER(state) || IS_EXSS_MARKER(state))

Definition at line 49 of file dca_parser.c.

Referenced by dca_find_frame_end(), dxva2_vc1_decode_slice(), extract_extradata_vc1(), vaapi_vc1_decode_slice(), vc1_decode_frame(), and vc1_split().

#define CORE_MARKER

(

state

)

((state >> 16) & 0xFFFFFFFF)

Definition at line 51 of file dca_parser.c.

Referenced by dca_find_frame_end().

#define EXSS_MARKER

(

state

)

(state & 0xFFFFFFFF)

Definition at line 52 of file dca_parser.c.

Referenced by dca_find_frame_end().

#define STATE_LE

(

state

)

(((state & 0xFF00FF00) >> 8) | ((state & 0x00FF00FF) << 8))

Definition at line 54 of file dca_parser.c.

Referenced by dca_find_frame_end().

#define STATE_14

(

state

)

(((state & 0x3FFF0000) >> 8) | ((state & 0x00003FFF) >> 6))

Definition at line 55 of file dca_parser.c.

Referenced by dca_find_frame_end().

#define CORE_FRAMESIZE

(

state

)

(((state >> 4) & 0x3FFF) + 1)

Definition at line 57 of file dca_parser.c.

Referenced by dca_find_frame_end().

#define EXSS_FRAMESIZE

(

state

)

Value:

((state & 0x2000000000) ? \
                                 ((state >>  5) & 0xFFFFF) + 1 : \
                                 ((state >> 13) & 0x0FFFF) + 1)

Definition at line 58 of file dca_parser.c.

Referenced by dca_find_frame_end().

Function Documentation

static int dca_find_frame_end ( DCAParseContext *  pc1, const uint8_t *  buf, int  buf_size  )

static

Find the end of the current frame in the bitstream.

Returns

the position of the first byte of the next frame, or -1

Definition at line 66 of file dca_parser.c.

Referenced by dca_parse().

static av_cold int dca_parse_init ( AVCodecParserContext *  s )

static

Definition at line 182 of file dca_parser.c.

static int dca_parse_params ( DCAParseContext *  pc1, const uint8_t *  buf, int  buf_size, int *  duration, int *  sample_rate  )

static

Definition at line 191 of file dca_parser.c.

Referenced by dca_parse().

static int dca_parse ( AVCodecParserContext *  s, AVCodecContext *  avctx, const uint8_t **  poutbuf, int *  poutbuf_size, const uint8_t *  buf, int  buf_size  )

static

Definition at line 277 of file dca_parser.c.

Variable Documentation

AVCodecParser ff_dca_parser

Initial value:

= {
    .codec_ids      = { AV_CODEC_ID_DTS },
    .priv_data_size = sizeof(DCAParseContext),
    .parser_init    = dca_parse_init,
    .parser_parse   = dca_parse,
    .parser_close   = ff_parse_close,
}

Definition at line 317 of file dca_parser.c.