libavcodec/mlp_parser.c File Reference

MLP parser. More...

#include <stdint.h>
#include "libavutil/crc.h"
#include "libavutil/audioconvert.h"
#include "get_bits.h"
#include "parser.h"
#include "mlp_parser.h"
#include "mlp.h"

Go to the source code of this file.

Data Structures

struct  MLPParseContext

Functions

static int mlp_samplerate (int in)
static int truehd_channels (int chanmap)
uint64_t ff_truehd_layout (int chanmap)
int ff_mlp_read_major_sync (void *log, MLPHeaderInfo *mh, GetBitContext *gb)
 Read a major sync info header - contains high level information about the stream - sample rate, channel arrangement etc.
static av_cold int mlp_init (AVCodecParserContext *s)
static int mlp_parse (AVCodecParserContext *s, AVCodecContext *avctx, const uint8_t **poutbuf, int *poutbuf_size, const uint8_t *buf, int buf_size)

Variables

static const uint8_t mlp_quants [16]
static const uint8_t mlp_channels [32]
const uint64_t ff_mlp_layout [32]
static const uint8_t thd_chancount [13]
static const uint64_t thd_layout [13]
AVCodecParser ff_mlp_parser


Detailed Description

MLP parser.

Definition in file mlp_parser.c.


Function Documentation

int ff_mlp_read_major_sync ( void *  log,
MLPHeaderInfo mh,
GetBitContext gb 
)

Read a major sync info header - contains high level information about the stream - sample rate, channel arrangement etc.

Most of this information is not actually necessary for decoding, only for playback. gb must be a freshly initialized GetBitContext with no bits read.

Definition at line 127 of file mlp_parser.c.

Referenced by mlp_parse(), and read_major_sync().

uint64_t ff_truehd_layout ( int  chanmap  ) 

Definition at line 110 of file mlp_parser.c.

Referenced by mlp_parse(), and read_major_sync().

static av_cold int mlp_init ( AVCodecParserContext s  )  [static]

Definition at line 206 of file mlp_parser.c.

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

Definition at line 212 of file mlp_parser.c.

static int mlp_samplerate ( int  in  )  [static]

Definition at line 92 of file mlp_parser.c.

Referenced by ff_mlp_read_major_sync().

static int truehd_channels ( int  chanmap  )  [static]

Definition at line 100 of file mlp_parser.c.

Referenced by mlp_parse().


Variable Documentation

const uint64_t ff_mlp_layout[32]

Initial value:

 {
    AV_CH_LAYOUT_MONO,
    AV_CH_LAYOUT_STEREO,
    AV_CH_LAYOUT_2_1,
    AV_CH_LAYOUT_QUAD,
    AV_CH_LAYOUT_STEREO|AV_CH_LOW_FREQUENCY,
    AV_CH_LAYOUT_2_1|AV_CH_LOW_FREQUENCY,
    AV_CH_LAYOUT_QUAD|AV_CH_LOW_FREQUENCY,
    AV_CH_LAYOUT_SURROUND,
    AV_CH_LAYOUT_4POINT0,
    AV_CH_LAYOUT_5POINT0_BACK,
    AV_CH_LAYOUT_SURROUND|AV_CH_LOW_FREQUENCY,
    AV_CH_LAYOUT_4POINT0|AV_CH_LOW_FREQUENCY,
    AV_CH_LAYOUT_5POINT1_BACK,
    AV_CH_LAYOUT_4POINT0,
    AV_CH_LAYOUT_5POINT0_BACK,
    AV_CH_LAYOUT_SURROUND|AV_CH_LOW_FREQUENCY,
    AV_CH_LAYOUT_4POINT0|AV_CH_LOW_FREQUENCY,
    AV_CH_LAYOUT_5POINT1_BACK,
    AV_CH_LAYOUT_QUAD|AV_CH_LOW_FREQUENCY,
    AV_CH_LAYOUT_5POINT0_BACK,
    AV_CH_LAYOUT_5POINT1_BACK,
    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
}

Definition at line 46 of file mlp_parser.c.

Referenced by mlp_parse(), and read_major_sync().

Initial value:

 {
    .codec_ids      = { CODEC_ID_MLP, CODEC_ID_TRUEHD },
    .priv_data_size = sizeof(MLPParseContext),
    .parser_init    = mlp_init,
    .parser_parse   = mlp_parse,
    .parser_close   = ff_parse_close,
}

Definition at line 351 of file mlp_parser.c.

const uint8_t mlp_channels[32] [static]

Initial value:

 {
    1, 2, 3, 4, 3, 4, 5, 3, 4, 5, 4, 5, 6, 4, 5, 4,
    5, 6, 5, 5, 6, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
}

Definition at line 41 of file mlp_parser.c.

Referenced by mlp_parse().

const uint8_t mlp_quants[16] [static]

Initial value:

 {
    16, 20, 24, 0, 0, 0, 0, 0,
     0,  0,  0, 0, 0, 0, 0, 0,
}

Definition at line 36 of file mlp_parser.c.

Referenced by ff_mlp_read_major_sync().

const uint8_t thd_chancount[13] [static]

Initial value:

 {

     2,   1,   1,   2,   2,   2,   2,   1,   1,   2,   2,   1,   1
}

Definition at line 71 of file mlp_parser.c.

Referenced by truehd_channels().

const uint64_t thd_layout[13] [static]


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