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/*
Copyright (c) 2005, The Musepack Development Team
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following
disclaimer in the documentation and/or other materials provided
with the distribution.
* Neither the name of the The Musepack Development Team nor the
names of its contributors may be used to endorse or promote
products derived from this software without specific prior
written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/// \file decoder.h
#ifndef _musepack_decoder_h_
#define _musepack_decoder_h_
#include "huffman.h"
#include "math.h"
#include "musepack.h"
#include "reader.h"
#include "streaminfo.h"
enum {
MPC_V_MEM = 2304,
MPC_DECODER_MEMSIZE = 16384, // overall buffer size
};
typedef struct {
mpc_int32_t L [36];
mpc_int32_t R [36];
} QuantTyp;
typedef struct mpc_decoder_t {
mpc_reader *r;
/// @name internal state variables
//@{
mpc_uint32_t dword; /// actually decoded 32bit-word
mpc_uint32_t pos; /// bit-position within dword
mpc_uint32_t Speicher[MPC_DECODER_MEMSIZE]; /// read-buffer
mpc_uint32_t Zaehler; /// actual index within read-buffer
mpc_uint32_t samples_to_skip;
mpc_uint32_t FwdJumpInfo;
mpc_uint32_t ActDecodePos;
mpc_uint32_t FrameWasValid;
mpc_uint32_t DecodedFrames;
mpc_uint32_t OverallFrames;
mpc_int32_t SampleRate; // Sample frequency
mpc_uint32_t StreamVersion; // version of bitstream
mpc_uint32_t MS_used; // MS-coding used ?
mpc_int32_t Max_Band;
mpc_uint32_t MPCHeaderPos; // AB: needed to support ID3v2
mpc_uint32_t LastValidSamples;
mpc_uint32_t TrueGaplessPresent;
mpc_uint32_t EQ_activated;
mpc_uint32_t WordsRead; // counts amount of decoded dwords
// randomizer state variables
mpc_uint32_t __r1;
mpc_uint32_t __r2;
mpc_uint32_t Q_bit [32];
mpc_uint32_t Q_res [32][16];
// huffman table stuff
HuffmanTyp HuffHdr [10];
HuffmanTyp HuffSCFI [ 4];
HuffmanTyp HuffDSCF [16];
HuffmanTyp* HuffQ [2] [8];
HuffmanTyp HuffQ1 [2] [3*3*3];
HuffmanTyp HuffQ2 [2] [5*5];
HuffmanTyp HuffQ3 [2] [ 7];
HuffmanTyp HuffQ4 [2] [ 9];
HuffmanTyp HuffQ5 [2] [15];
HuffmanTyp HuffQ6 [2] [31];
HuffmanTyp HuffQ7 [2] [63];
const HuffmanTyp* SampleHuff [18];
HuffmanTyp SCFI_Bundle [ 8];
HuffmanTyp DSCF_Entropie [13];
HuffmanTyp Region_A [16];
HuffmanTyp Region_B [ 8];
HuffmanTyp Region_C [ 4];
HuffmanTyp Entropie_1 [ 3];
HuffmanTyp Entropie_2 [ 5];
HuffmanTyp Entropie_3 [ 7];
HuffmanTyp Entropie_4 [ 9];
HuffmanTyp Entropie_5 [15];
HuffmanTyp Entropie_6 [31];
HuffmanTyp Entropie_7 [63];
mpc_int32_t SCF_Index_L [32] [3];
mpc_int32_t SCF_Index_R [32] [3]; // holds scalefactor-indices
QuantTyp Q [32]; // holds quantized samples
mpc_int32_t Res_L [32];
mpc_int32_t Res_R [32]; // holds the chosen quantizer for each subband
mpc_int32_t DSCF_Flag_L [32];
mpc_int32_t DSCF_Flag_R [32]; // differential SCF used?
mpc_int32_t SCFI_L [32];
mpc_int32_t SCFI_R [32]; // describes order of transmitted SCF
mpc_int32_t DSCF_Reference_L [32];
mpc_int32_t DSCF_Reference_R [32]; // holds last frames SCF
mpc_int32_t MS_Flag[32]; // MS used?
#ifdef MPC_FIXED_POINT
unsigned char SCF_shift[256];
#endif
MPC_SAMPLE_FORMAT V_L[MPC_V_MEM + 960];
MPC_SAMPLE_FORMAT V_R[MPC_V_MEM + 960];
MPC_SAMPLE_FORMAT Y_L[36][32];
MPC_SAMPLE_FORMAT Y_R[36][32];
MPC_SAMPLE_FORMAT SCF[256]; ///< holds adapted scalefactors (for clipping prevention)
//@}
} mpc_decoder;
#endif // _mpc_decoder_h
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