mpc8.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/lfg.h"
#include "avcodec.h"
#include "get_bits.h"
#include "internal.h"
#include "mpegaudiodsp.h"
#include "mpc.h"
#include "mpc8data.h"
#include "mpc8huff.h"

Go to the source code of this file.

Functions
static int	mpc8_dec_base (GetBitContext *gb, int k, int n)
static int	mpc8_dec_enum (GetBitContext *gb, int k, int n)
static int	mpc8_get_mod_golomb (GetBitContext *gb, int m)
static int	mpc8_get_mask (GetBitContext *gb, int size, int t)
static av_cold int	mpc8_decode_init (AVCodecContext *avctx)
static int	mpc8_decode_frame (AVCodecContext *avctx, void *data, int *got_frame_ptr, AVPacket *avpkt)
static av_cold void	mpc8_decode_flush (AVCodecContext *avctx)

Variables
static VLC	band_vlc
static VLC	scfi_vlc [2]
static VLC	dscf_vlc [2]
static VLC	res_vlc [2]
static VLC	q1_vlc
static VLC	q2_vlc [2]
static VLC	q3_vlc [2]
static VLC	quant_vlc [4][2]
static VLC	q9up_vlc
static const int	q3_offsets [2] = { MPC8_Q3_OFFSET, MPC8_Q4_OFFSET }
static const int	quant_offsets [6] = { MPC8_Q5_OFFSET, MPC8_Q6_OFFSET, MPC8_Q7_OFFSET, MPC8_Q8_OFFSET }
static const uint16_t	vlc_offsets [13]
AVCodec	ff_mpc8_decoder

Detailed Description

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

Definition in file mpc8.c.

Function Documentation

static int mpc8_dec_base ( GetBitContext *  gb, int  k, int  n  )

inlinestatic

Definition at line 45 of file mpc8.c.

Referenced by mpc8_dec_enum(), and mpc8_get_mod_golomb().

static int mpc8_dec_enum ( GetBitContext *  gb, int  k, int  n  )

inlinestatic

Definition at line 56 of file mpc8.c.

Referenced by mpc8_get_mask().

static int mpc8_get_mod_golomb ( GetBitContext *  gb, int  m  )

inlinestatic

Definition at line 75 of file mpc8.c.

Referenced by mpc8_decode_frame().

static int mpc8_get_mask ( GetBitContext *  gb, int  size, int  t  )

static

Definition at line 81 of file mpc8.c.

Referenced by mpc8_decode_frame().

static av_cold int mpc8_decode_init ( AVCodecContext *  avctx )

static

Definition at line 96 of file mpc8.c.

static int mpc8_decode_frame ( AVCodecContext *  avctx, void *  data, int *  got_frame_ptr, AVPacket *  avpkt  )

static

Definition at line 239 of file mpc8.c.

static av_cold void mpc8_decode_flush ( AVCodecContext *  avctx )

static

Definition at line 428 of file mpc8.c.

Variable Documentation

VLC band_vlc

static

Definition at line 39 of file mpc8.c.

VLC scfi_vlc[2]

static

Definition at line 39 of file mpc8.c.

VLC dscf_vlc[2]

static

Definition at line 39 of file mpc8.c.

VLC res_vlc[2]

static

Definition at line 39 of file mpc8.c.

VLC q1_vlc

static

Definition at line 40 of file mpc8.c.

VLC q2_vlc[2]

static

Definition at line 40 of file mpc8.c.

VLC q3_vlc[2]

static

Definition at line 40 of file mpc8.c.

VLC quant_vlc[4][2]

static

Definition at line 40 of file mpc8.c.

VLC q9up_vlc

static

Definition at line 40 of file mpc8.c.

const int q3_offsets[2] = { MPC8_Q3_OFFSET, MPC8_Q4_OFFSET }

static

Definition at line 42 of file mpc8.c.

Referenced by mpc8_decode_frame().

const int quant_offsets[6] = { MPC8_Q5_OFFSET, MPC8_Q6_OFFSET, MPC8_Q7_OFFSET, MPC8_Q8_OFFSET }

static

Definition at line 43 of file mpc8.c.

Referenced by mpc8_decode_frame().

const uint16_t vlc_offsets[13]

static

Initial value:

= {
    0, 640, 1184, 1748, 2298, 2426, 2554, 3066, 3578, 4106, 4618, 5196, 5708
}

Definition at line 92 of file mpc8.c.

Referenced by mpc8_decode_init().

AVCodec ff_mpc8_decoder

Initial value:

= {
    .name           = "mpc8",
    .long_name      = NULL_IF_CONFIG_SMALL("Musepack SV8"),
    .type           = AVMEDIA_TYPE_AUDIO,
    .id             = AV_CODEC_ID_MUSEPACK8,
    .priv_data_size = sizeof(MPCContext),
    .init           = mpc8_decode_init,
    .decode         = mpc8_decode_frame,
    .flush          = mpc8_decode_flush,
    .capabilities   = CODEC_CAP_DR1,
    .sample_fmts    = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_S16P,
                                                      AV_SAMPLE_FMT_NONE },
}

Definition at line 434 of file mpc8.c.