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