mlp_parser.c File Reference

MLP parser. More...

#include <stdint.h>
#include "libavutil/channel_layout.h"
#include "libavutil/crc.h"
#include "libavutil/internal.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)
static int	mlp_get_major_sync_size (const uint8_t *buf, int bufsize)
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. More...
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

mlp_samplerate()

static int mlp_samplerate ( int  in )

static

Definition at line 93 of file mlp_parser.c.

Referenced by ff_mlp_read_major_sync().

truehd_channels()

static int truehd_channels ( int  chanmap )

static

Definition at line 101 of file mlp_parser.c.

Referenced by ff_mlp_read_major_sync().

ff_truehd_layout()

uint64_t ff_truehd_layout

(

int

chanmap

)

Definition at line 111 of file mlp_parser.c.

Referenced by ff_mlp_read_major_sync().

mlp_get_major_sync_size()

static int mlp_get_major_sync_size ( const uint8_t *  buf, int  bufsize  )

static

Definition at line 122 of file mlp_parser.c.

Referenced by ff_mlp_read_major_sync().

ff_mlp_read_major_sync()

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 145 of file mlp_parser.c.

Referenced by mlp_parse(), and read_major_sync().

mlp_init()

static av_cold int mlp_init ( AVCodecParserContext *  s )

static

Definition at line 237 of file mlp_parser.c.

mlp_parse()

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 243 of file mlp_parser.c.

Variable Documentation

mlp_quants

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 37 of file mlp_parser.c.

Referenced by ff_mlp_read_major_sync().

mlp_channels

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 42 of file mlp_parser.c.

Referenced by ff_mlp_read_major_sync().

ff_mlp_layout

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 47 of file mlp_parser.c.

Referenced by ff_mlp_read_major_sync().

thd_chancount

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 72 of file mlp_parser.c.

Referenced by truehd_channels().

thd_layout

const uint64_t thd_layout[13]

static

Initial value:

= {
    AV_CH_FRONT_LEFT|AV_CH_FRONT_RIGHT,                     
    AV_CH_FRONT_CENTER,                                     
    AV_CH_LOW_FREQUENCY,                                    
    AV_CH_SIDE_LEFT|AV_CH_SIDE_RIGHT,                       
    AV_CH_TOP_FRONT_LEFT|AV_CH_TOP_FRONT_RIGHT,             
    AV_CH_FRONT_LEFT_OF_CENTER|AV_CH_FRONT_RIGHT_OF_CENTER, 
    AV_CH_BACK_LEFT|AV_CH_BACK_RIGHT,                       
    AV_CH_BACK_CENTER,                                      
    AV_CH_TOP_CENTER,                                       
    AV_CH_SURROUND_DIRECT_LEFT|AV_CH_SURROUND_DIRECT_RIGHT, 
    AV_CH_WIDE_LEFT|AV_CH_WIDE_RIGHT,                       
    AV_CH_TOP_FRONT_CENTER,                                 
    AV_CH_LOW_FREQUENCY_2,                                  
}

Definition at line 77 of file mlp_parser.c.

Referenced by ff_truehd_layout().

ff_mlp_parser

AVCodecParser ff_mlp_parser

Initial value:

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

Definition at line 394 of file mlp_parser.c.