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FFmpeg/libavcodec/mpc.h
Michael Niedermayer 55c49afc42 Merge remote-tracking branch 'qatar/master'
* qatar/master:
  yuv4mpeg: return proper error codes.
  Give all anonymously typedeffed structs in headers a name
  fate: Add parseutils test
  parseutils-test: Drop random colors from parsing test
  vf_pad/scale: use double precision for aspect ratios.
  build: error on variable-length arrays
  ppc: swscale: rework yuv2planeX_altivec()
  ppc: fmtconvert: kill VLA in float_to_int16_interleave_altivec()
  x86: dsputil: kill VLA in gmc_mmx()
  libspeexenc: Updated commentary to reflect recent changes
  libspeexenc: Add an option for enabling DTX
  doc/APIchanges: fill in missing dates and hashes.
  lavr: bump major to 1 and declare it stable.
  lavr: change the type of the data buffers to uint8_t**.
  lavc: deprecate the audio resampling API.

Conflicts:
	cmdutils.h
	configure
	doc/APIchanges
	ffplay.c
	libavcodec/dwt.h
	libavcodec/libspeexenc.c
	libavfilter/vf_pad.c
	libavfilter/vf_scale.c
	libavformat/asf.h
	tests/fate/libavutil.mak
	tests/ref/fate/parseutils

Merged-by: Michael Niedermayer <michaelni@gmx.at>
2012-10-06 13:45:08 +02:00

79 lines
2.2 KiB
C

/*
* Musepack decoder
* Copyright (c) 2006 Konstantin Shishkov
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* Musepack decoder
* MPEG Audio Layer 1/2 -like codec with frames of 1152 samples
* divided into 32 subbands.
*/
#ifndef AVCODEC_MPC_H
#define AVCODEC_MPC_H
#include "libavutil/lfg.h"
#include "avcodec.h"
#include "get_bits.h"
#include "dsputil.h"
#include "mpegaudio.h"
#include "mpegaudiodsp.h"
#define BANDS 32
#define SAMPLES_PER_BAND 36
#define MPC_FRAME_SIZE (BANDS * SAMPLES_PER_BAND)
/** Subband structure - hold all variables for each subband */
typedef struct Band {
int msf; ///< mid-stereo flag
int res[2];
int scfi[2];
int scf_idx[2][3];
int Q[2];
}Band;
typedef struct MPCContext {
AVFrame frame;
DSPContext dsp;
MPADSPContext mpadsp;
GetBitContext gb;
int IS, MSS, gapless;
int lastframelen;
int maxbands, last_max_band;
int last_bits_used;
int oldDSCF[2][BANDS];
Band bands[BANDS];
int Q[2][MPC_FRAME_SIZE];
int cur_frame, frames;
uint8_t *bits;
int buf_size;
AVLFG rnd;
int frames_to_skip;
/* for synthesis */
DECLARE_ALIGNED(16, MPA_INT, synth_buf)[MPA_MAX_CHANNELS][512*2];
int synth_buf_offset[MPA_MAX_CHANNELS];
DECLARE_ALIGNED(16, int32_t, sb_samples)[MPA_MAX_CHANNELS][36][SBLIMIT];
} MPCContext;
void ff_mpc_init(void);
void ff_mpc_dequantize_and_synth(MPCContext *c, int maxband, int16_t **out, int channels);
#endif /* AVCODEC_MPC_H */