metasound.c File Reference

#include <inttypes.h>
#include <math.h>
#include <stdint.h>
#include "libavutil/channel_layout.h"
#include "avcodec.h"
#include "codec_internal.h"
#include "get_bits.h"
#include "twinvq.h"
#include "metasound_data.h"

Go to the source code of this file.

Data Structures
struct	MetasoundProps

Macros
#define	BITSTREAM_READER_LE

Functions
static void	add_peak (float period, int width, const float *shape, float ppc_gain, float *speech, int len)
static void	decode_ppc (TwinVQContext *tctx, int period_coef, int g_coef, const float *shape, float *speech)
static void	dec_bark_env (TwinVQContext *tctx, const uint8_t *in, int use_hist, int ch, float *out, float gain, enum TwinVQFrameType ftype)
static void	read_cb_data (TwinVQContext *tctx, GetBitContext *gb, uint8_t *dst, enum TwinVQFrameType ftype)
static int	metasound_read_bitstream (AVCodecContext *avctx, TwinVQContext *tctx, const uint8_t *buf, int buf_size)
static av_cold int	metasound_decode_init (AVCodecContext *avctx)

Variables
static const MetasoundProps	codec_props []
const FFCodec	ff_metasound_decoder

Macro Definition Documentation

BITSTREAM_READER_LE

#define BITSTREAM_READER_LE

Definition at line 30 of file metasound.c.

Function Documentation

add_peak()

static void add_peak ( float period, int width, const float * shape, float ppc_gain, float * speech, int len )

static

Definition at line 38 of file metasound.c.

Referenced by decode_ppc().

decode_ppc()

static void decode_ppc ( TwinVQContext * tctx, int period_coef, int g_coef, const float * shape, float * speech )

static

Definition at line 60 of file metasound.c.

Referenced by metasound_decode_init(), and twinvq_decode_init().

dec_bark_env()

static void dec_bark_env ( TwinVQContext * tctx, const uint8_t * in, int use_hist, int ch, float * out, float gain, enum TwinVQFrameType ftype )

static

Definition at line 112 of file metasound.c.

Referenced by metasound_decode_init(), and twinvq_decode_init().

read_cb_data()

static void read_cb_data ( TwinVQContext * tctx, GetBitContext * gb, uint8_t * dst, enum TwinVQFrameType ftype )

static

Definition at line 150 of file metasound.c.

Referenced by metasound_read_bitstream().

metasound_read_bitstream()

static int metasound_read_bitstream ( AVCodecContext * avctx, TwinVQContext * tctx, const uint8_t * buf, int buf_size )

static

Definition at line 163 of file metasound.c.

Referenced by metasound_decode_init().

metasound_decode_init()

static av_cold int metasound_decode_init ( AVCodecContext * avctx )

static

Definition at line 271 of file metasound.c.

Variable Documentation

codec_props

const MetasoundProps codec_props[]

static

Initial value:

= {
    { MKTAG('V','X','0','3'),  6, 1,  8000 },
    { MKTAG('V','X','0','4'), 12, 2,  8000 },
 
    { MKTAG('V','O','X','i'),  8, 1,  8000 },
    { MKTAG('V','O','X','j'), 10, 1, 11025 },
    { MKTAG('V','O','X','k'), 16, 1, 16000 },
    { MKTAG('V','O','X','L'), 24, 1, 22050 },
    { MKTAG('V','O','X','q'), 32, 1, 44100 },
    { MKTAG('V','O','X','r'), 40, 1, 44100 },
    { MKTAG('V','O','X','s'), 48, 1, 44100 },
    { MKTAG('V','O','X','t'), 16, 2,  8000 },
    { MKTAG('V','O','X','u'), 20, 2, 11025 },
    { MKTAG('V','O','X','v'), 32, 2, 16000 },
    { MKTAG('V','O','X','w'), 48, 2, 22050 },
    { MKTAG('V','O','X','x'), 64, 2, 44100 },
    { MKTAG('V','O','X','y'), 80, 2, 44100 },
    { MKTAG('V','O','X','z'), 96, 2, 44100 },
 
    { 0, 0, 0, 0 }
}

Definition at line 249 of file metasound.c.

Referenced by metasound_decode_init().

ff_metasound_decoder

const FFCodec ff_metasound_decoder

Initial value:

= {
    .p.name         = "metasound",
    CODEC_LONG_NAME("Voxware MetaSound"),
    .p.type         = AVMEDIA_TYPE_AUDIO,
    .p.id           = AV_CODEC_ID_METASOUND,
    .priv_data_size = sizeof(TwinVQContext),
    .init           = metasound_decode_init,
    .close          = ff_twinvq_decode_close,
    FF_CODEC_DECODE_CB(ff_twinvq_decode_frame),
    .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_CHANNEL_CONF,
    .caps_internal  = FF_CODEC_CAP_INIT_CLEANUP,
}

Definition at line 367 of file metasound.c.