yading@10: /*
yading@10:  * Musepack decoder
yading@10:  * Copyright (c) 2006 Konstantin Shishkov
yading@10:  *
yading@10:  * This file is part of FFmpeg.
yading@10:  *
yading@10:  * FFmpeg is free software; you can redistribute it and/or
yading@10:  * modify it under the terms of the GNU Lesser General Public
yading@10:  * License as published by the Free Software Foundation; either
yading@10:  * version 2.1 of the License, or (at your option) any later version.
yading@10:  *
yading@10:  * FFmpeg is distributed in the hope that it will be useful,
yading@10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@10:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@10:  * Lesser General Public License for more details.
yading@10:  *
yading@10:  * You should have received a copy of the GNU Lesser General Public
yading@10:  * License along with FFmpeg; if not, write to the Free Software
yading@10:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@10:  */
yading@10: 
yading@10: /**
yading@10:  * @file
yading@10:  * Musepack decoder
yading@10:  * MPEG Audio Layer 1/2 -like codec with frames of 1152 samples
yading@10:  * divided into 32 subbands.
yading@10:  */
yading@10: 
yading@10: #ifndef AVCODEC_MPC_H
yading@10: #define AVCODEC_MPC_H
yading@10: 
yading@10: #include "libavutil/lfg.h"
yading@10: #include "avcodec.h"
yading@10: #include "get_bits.h"
yading@10: #include "dsputil.h"
yading@10: #include "mpegaudio.h"
yading@10: #include "mpegaudiodsp.h"
yading@10: 
yading@10: #define BANDS            32
yading@10: #define SAMPLES_PER_BAND 36
yading@10: #define MPC_FRAME_SIZE   (BANDS * SAMPLES_PER_BAND)
yading@10: 
yading@10: /** Subband structure - hold all variables for each subband */
yading@10: typedef struct Band {
yading@10:     int msf; ///< mid-stereo flag
yading@10:     int res[2];
yading@10:     int scfi[2];
yading@10:     int scf_idx[2][3];
yading@10:     int Q[2];
yading@10: }Band;
yading@10: 
yading@10: typedef struct MPCContext {
yading@10:     DSPContext dsp;
yading@10:     MPADSPContext mpadsp;
yading@10:     GetBitContext gb;
yading@10:     int IS, MSS, gapless;
yading@10:     int lastframelen;
yading@10:     int maxbands, last_max_band;
yading@10:     int last_bits_used;
yading@10:     int oldDSCF[2][BANDS];
yading@10:     Band bands[BANDS];
yading@10:     int Q[2][MPC_FRAME_SIZE];
yading@10:     int cur_frame, frames;
yading@10:     uint8_t *bits;
yading@10:     int buf_size;
yading@10:     AVLFG rnd;
yading@10:     int frames_to_skip;
yading@10:     /* for synthesis */
yading@10:     DECLARE_ALIGNED(16, MPA_INT, synth_buf)[MPA_MAX_CHANNELS][512*2];
yading@10:     int synth_buf_offset[MPA_MAX_CHANNELS];
yading@10:     DECLARE_ALIGNED(16, int32_t, sb_samples)[MPA_MAX_CHANNELS][36][SBLIMIT];
yading@10: } MPCContext;
yading@10: 
yading@10: void ff_mpc_init(void);
yading@10: void ff_mpc_dequantize_and_synth(MPCContext *c, int maxband, int16_t **out, int channels);
yading@10: 
yading@10: #endif /* AVCODEC_MPC_H */