mpc7.c File Reference

MPEG Audio Layer 1/2 -like codec with frames of 1152 samples divided into 32 subbands. More...

#include "libavutil/channel_layout.h"
#include "libavutil/internal.h"
#include "libavutil/lfg.h"
#include "avcodec.h"
#include "get_bits.h"
#include "internal.h"
#include "mpegaudiodsp.h"
#include "mpc.h"
#include "mpc7data.h"

Go to the source code of this file.

Functions
static av_cold int	mpc7_decode_init (AVCodecContext *avctx)
static void	idx_to_quant (MPCContext *c, GetBitContext *gb, int idx, int *dst)
	Fill samples for given subband. More...
static int	get_scale_idx (GetBitContext *gb, int ref)
static int	mpc7_decode_frame (AVCodecContext *avctx, void *data, int *got_frame_ptr, AVPacket *avpkt)
static void	mpc7_decode_flush (AVCodecContext *avctx)
static av_cold int	mpc7_decode_close (AVCodecContext *avctx)

Variables
static VLC	scfi_vlc
static VLC	dscf_vlc
static VLC	hdr_vlc
static VLC	quant_vlc [MPC7_QUANT_VLC_TABLES][2]
static const uint16_t	quant_offsets [MPC7_QUANT_VLC_TABLES *2+1]
AVCodec	ff_mpc7_decoder

Detailed Description

MPEG Audio Layer 1/2 -like codec with frames of 1152 samples divided into 32 subbands.

Definition in file mpc7.c.

Function Documentation

mpc7_decode_init()

static av_cold int mpc7_decode_init ( AVCodecContext *  avctx )

static

Definition at line 48 of file mpc7.c.

idx_to_quant()

static void idx_to_quant ( MPCContext *  c, GetBitContext *  gb, int  idx, int *  dst  )

inlinestatic

Fill samples for given subband.

Definition at line 142 of file mpc7.c.

Referenced by mpc7_decode_frame().

get_scale_idx()

static int get_scale_idx ( GetBitContext *  gb, int  ref  )

static

Definition at line 184 of file mpc7.c.

Referenced by mpc7_decode_frame().

mpc7_decode_frame()

static int mpc7_decode_frame ( AVCodecContext *  avctx, void *  data, int *  got_frame_ptr, AVPacket *  avpkt  )

static

Definition at line 192 of file mpc7.c.

mpc7_decode_flush()

static void mpc7_decode_flush ( AVCodecContext *  avctx )

static

Definition at line 315 of file mpc7.c.

mpc7_decode_close()

static av_cold int mpc7_decode_close ( AVCodecContext *  avctx )

static

Definition at line 323 of file mpc7.c.

Variable Documentation

scfi_vlc

VLC scfi_vlc

static

Definition at line 39 of file mpc7.c.

dscf_vlc

VLC dscf_vlc

static

Definition at line 39 of file mpc7.c.

hdr_vlc

VLC hdr_vlc

static

Definition at line 39 of file mpc7.c.

quant_vlc

VLC quant_vlc[MPC7_QUANT_VLC_TABLES][2]

static

Definition at line 39 of file mpc7.c.

quant_offsets

const uint16_t quant_offsets[MPC7_QUANT_VLC_TABLES *2+1]

static

Initial value:

=
{
       0, 512, 1024, 1536, 2052, 2564, 3076, 3588, 4100, 4612, 5124,
       5636, 6164, 6676, 7224
}

Definition at line 41 of file mpc7.c.

Referenced by mpc7_decode_init().

ff_mpc7_decoder

AVCodec ff_mpc7_decoder

Initial value:

= {
    .name           = "mpc7",
    .long_name      = NULL_IF_CONFIG_SMALL("Musepack SV7"),
    .type           = AVMEDIA_TYPE_AUDIO,
    .id             = AV_CODEC_ID_MUSEPACK7,
    .priv_data_size = sizeof(MPCContext),
    .init           = mpc7_decode_init,
    .close          = mpc7_decode_close,
    .decode         = mpc7_decode_frame,
    .flush          = mpc7_decode_flush,
    .capabilities   = AV_CODEC_CAP_DR1,
    .sample_fmts    = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_S16P,
                                                      AV_SAMPLE_FMT_NONE },
}

Definition at line 331 of file mpc7.c.