libavcodec/mpc7.c File Reference

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

#include "libavutil/lfg.h"
#include "avcodec.h"
#include "get_bits.h"
#include "dsputil.h"
#include "mpegaudiodsp.h"
#include "libavutil/audioconvert.h"
#include "mpc.h"
#include "mpc7data.h"

Go to the source code of this file.

Defines
#define	BANDS   32
#define	SAMPLES_PER_BAND   36
#define	MPC_FRAME_SIZE   (BANDS * SAMPLES_PER_BAND)
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.
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.

---

Define Documentation

#define BANDS   32

Definition at line 38 of file mpc7.c.

#define MPC_FRAME_SIZE   (BANDS * SAMPLES_PER_BAND)

Definition at line 40 of file mpc7.c.

#define SAMPLES_PER_BAND   36

Definition at line 39 of file mpc7.c.

---

Function Documentation

static int get_scale_idx	(	GetBitContext *	gb,
		int	ref
	)			[static]

Definition at line 191 of file mpc7.c.

Referenced by mpc7_decode_frame().

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

Fill samples for given subband.

Definition at line 149 of file mpc7.c.

Referenced by mpc7_decode_frame().

static av_cold int mpc7_decode_close

(

AVCodecContext *

avctx

)

[static]

Definition at line 330 of file mpc7.c.

static void mpc7_decode_flush

(

AVCodecContext *

avctx

)

[static]

Definition at line 322 of file mpc7.c.

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

Definition at line 199 of file mpc7.c.

static av_cold int mpc7_decode_init

(

AVCodecContext *

avctx

)

[static]

Definition at line 51 of file mpc7.c.

---

Variable Documentation

VLC dscf_vlc [static]

Definition at line 42 of file mpc7.c.

AVCodec ff_mpc7_decoder

Initial value:

 {
    .name           = "mpc7",
    .type           = AVMEDIA_TYPE_AUDIO,
    .id             = 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   = CODEC_CAP_DR1,
    .long_name      = NULL_IF_CONFIG_SMALL("Musepack SV7"),
}

Definition at line 338 of file mpc7.c.

VLC hdr_vlc [static]

Definition at line 42 of file mpc7.c.

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 44 of file mpc7.c.

Referenced by mpc7_decode_init(), and mpc8_decode_frame().

VLC quant_vlc[MPC7_QUANT_VLC_TABLES][2] [static]

Definition at line 42 of file mpc7.c.

VLC scfi_vlc [static]

Definition at line 42 of file mpc7.c.