FFmpeg: libavcodec/dca_parser.c File Reference

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libavcodec

Data Structures | Macros | Functions | Variables

dca_parser.c File Reference

#include "dca.h"
#include "dca_core.h"
#include "dca_exss.h"
#include "dca_lbr.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, int *profile)

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

Variables

const AVCodecParser ff_dca_parser

Macro Definition Documentation

◆ IS_CORE_MARKER

#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 43 of file dca_parser.c.

◆ IS_EXSS_MARKER

#define IS_EXSS_MARKER ( state ) ((state & 0xFFFFFFFF) == DCA_SYNCWORD_SUBSTREAM)

Definition at line 49 of file dca_parser.c.

◆ IS_MARKER

#define IS_MARKER ( state ) (IS_CORE_MARKER(state) || IS_EXSS_MARKER(state))

Definition at line 51 of file dca_parser.c.

◆ CORE_MARKER

#define CORE_MARKER ( state ) ((state >> 16) & 0xFFFFFFFF)

Definition at line 53 of file dca_parser.c.

◆ EXSS_MARKER

#define EXSS_MARKER ( state ) (state & 0xFFFFFFFF)

Definition at line 54 of file dca_parser.c.

◆ STATE_LE

#define STATE_LE ( state ) (((state & 0xFF00FF00) >> 8) | ((state & 0x00FF00FF) << 8))

Definition at line 56 of file dca_parser.c.

◆ STATE_14

#define STATE_14 ( state ) (((state & 0x3FFF0000) >> 8) | ((state & 0x00003FFF) >> 6))

Definition at line 57 of file dca_parser.c.

◆ CORE_FRAMESIZE

#define CORE_FRAMESIZE ( state ) (((state >> 4) & 0x3FFF) + 1)

Definition at line 59 of file dca_parser.c.

◆ EXSS_FRAMESIZE

#define EXSS_FRAMESIZE ( state )

Value:

((state & 0x2000000000) ? \

((state >> 5) & 0xFFFFF) + 1 : \

((state >> 13) & 0x0FFFF) + 1)

Definition at line 60 of file dca_parser.c.

Function Documentation

◆ dca_find_frame_end()

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 68 of file dca_parser.c.

Referenced by dca_parse().

◆ dca_parse_init()

static av_cold int dca_parse_init ( AVCodecParserContext * s )

static

Definition at line 184 of file dca_parser.c.

◆ dca_parse_params()

static int dca_parse_params ( DCAParseContext * pc1,

const uint8_t * buf,

int buf_size,

int * duration,

int * sample_rate,

int * profile

)

static

Definition at line 193 of file dca_parser.c.

Referenced by dca_parse().

◆ 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 306 of file dca_parser.c.

Variable Documentation

◆ ff_dca_parser

const 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 346 of file dca_parser.c.

DCA_SYNCWORD_CORE_14B_BE

#define DCA_SYNCWORD_CORE_14B_BE

Definition: dca_syncwords.h:24

ff_parse_close

void ff_parse_close(AVCodecParserContext *s)

Definition: parser.c:290

DCA_SYNCWORD_CORE_BE

#define DCA_SYNCWORD_CORE_BE

Definition: dca_syncwords.h:22

AV_CODEC_ID_DTS

@ AV_CODEC_ID_DTS

Definition: codec_id.h:444

DCA_SYNCWORD_CORE_14B_LE

#define DCA_SYNCWORD_CORE_14B_LE

Definition: dca_syncwords.h:25

dca_parse

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

Definition: dca_parser.c:306

DCAParseContext

Definition: dca_parser.c:33

DCA_SYNCWORD_CORE_LE

#define DCA_SYNCWORD_CORE_LE

Definition: dca_syncwords.h:23

state

static struct @454 state

dca_parse_init

static av_cold int dca_parse_init(AVCodecParserContext *s)

Definition: dca_parser.c:184

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