libmpcdec: include/mpcdec/decoder.h Source File

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# decoder.h

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    00001 /*
    00002   Copyright (c) 2005, The Musepack Development Team
    00003   All rights reserved.
    00004
    00005   Redistribution and use in source and binary forms, with or without
    00006   modification, are permitted provided that the following conditions are
    00007   met:
    00008
    00009   * Redistributions of source code must retain the above copyright
    00010   notice, this list of conditions and the following disclaimer.
    00011
    00012   * Redistributions in binary form must reproduce the above
    00013   copyright notice, this list of conditions and the following
    00014   disclaimer in the documentation and/or other materials provided
    00015   with the distribution.
    00016
    00017   * Neither the name of the The Musepack Development Team nor the
    00018   names of its contributors may be used to endorse or promote
    00019   products derived from this software without specific prior
    00020   written permission.
    00021
    00022   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
    00023   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
    00024   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
    00025   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
    00026   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
    00027   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
    00028   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
    00029   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
    00030   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
    00031   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
    00032   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
    00033 */
    00034
    00036
    00037 #ifndef _mpcdec_decoder_h_
    00038 #define _mpcdec_decoder_h_
    00039
    00040 #include "huffman.h"
    00041 #include "math.h"
    00042 #include "mpcdec.h"
    00043 #include "reader.h"
    00044 #include "streaminfo.h"
    00045
    00046 enum {
    00047     MPC_V_MEM = 2304,
    00048     MPC_DECODER_MEMSIZE = 16384,  // overall buffer size
    00049 };
    00050
    00051 typedef struct {
    00052     mpc_int32_t  L [36];
    00053     mpc_int32_t  R [36];
    00054 } QuantTyp;
    00055
    00056 typedef struct mpc_decoder_t {
    00057     mpc_reader *r;
    00058
    00060
    00061
    00062     mpc_uint32_t  dword;
    00063     mpc_uint32_t  pos;
    00064     mpc_uint32_t  Speicher[MPC_DECODER_MEMSIZE];
    00065     mpc_uint32_t  Zaehler;
    00066
    00067     mpc_uint32_t samples_to_skip;
    00068
    00069     mpc_uint32_t  FwdJumpInfo;
    00070     mpc_uint32_t  ActDecodePos;
    00071     mpc_uint32_t  FrameWasValid;
    00072
    00073     mpc_uint32_t  DecodedFrames;
    00074     mpc_uint32_t  OverallFrames;
    00075     mpc_int32_t   SampleRate;                 // Sample frequency
    00076
    00077     mpc_uint32_t  StreamVersion;              // version of bitstream
    00078     mpc_uint32_t  MS_used;                    // MS-coding used ?
    00079     mpc_int32_t   Max_Band;
    00080     mpc_uint32_t  MPCHeaderPos;               // AB: needed to support ID3v2
    00081     mpc_uint32_t  LastValidSamples;
    00082     mpc_uint32_t  TrueGaplessPresent;
    00083
    00084     mpc_uint32_t  EQ_activated;
    00085
    00086     mpc_uint32_t  WordsRead;                  // counts amount of decoded dwords
    00087
    00088     // randomizer state variables
    00089     mpc_uint32_t  __r1;
    00090     mpc_uint32_t  __r2;
    00091
    00092     mpc_uint32_t  Q_bit [32];
    00093     mpc_uint32_t  Q_res [32][16];
    00094
    00095     // huffman table stuff
    00096     HuffmanTyp    HuffHdr  [10];
    00097     HuffmanTyp    HuffSCFI [ 4];
    00098     HuffmanTyp    HuffDSCF [16];
    00099     HuffmanTyp*   HuffQ [2] [8];
    00100
    00101     HuffmanTyp    HuffQ1 [2] [3*3*3];
    00102     HuffmanTyp    HuffQ2 [2] [5*5];
    00103     HuffmanTyp    HuffQ3 [2] [ 7];
    00104     HuffmanTyp    HuffQ4 [2] [ 9];
    00105     HuffmanTyp    HuffQ5 [2] [15];
    00106     HuffmanTyp    HuffQ6 [2] [31];
    00107     HuffmanTyp    HuffQ7 [2] [63];
    00108     const HuffmanTyp* SampleHuff [18];
    00109     HuffmanTyp    SCFI_Bundle   [ 8];
    00110     HuffmanTyp    DSCF_Entropie [13];
    00111     HuffmanTyp    Region_A [16];
    00112     HuffmanTyp    Region_B [ 8];
    00113     HuffmanTyp    Region_C [ 4];
    00114
    00115     HuffmanTyp    Entropie_1 [ 3];
    00116     HuffmanTyp    Entropie_2 [ 5];
    00117     HuffmanTyp    Entropie_3 [ 7];
    00118     HuffmanTyp    Entropie_4 [ 9];
    00119     HuffmanTyp    Entropie_5 [15];
    00120     HuffmanTyp    Entropie_6 [31];
    00121     HuffmanTyp    Entropie_7 [63];
    00122
    00123     mpc_int32_t   SCF_Index_L [32] [3];
    00124     mpc_int32_t   SCF_Index_R [32] [3];       // holds scalefactor-indices
    00125     QuantTyp      Q [32];                     // holds quantized samples
    00126     mpc_int32_t   Res_L [32];
    00127     mpc_int32_t   Res_R [32];                 // holds the chosen quantizer for each subband
    00128     mpc_int32_t   DSCF_Flag_L [32];
    00129     mpc_int32_t   DSCF_Flag_R [32];           // differential SCF used?
    00130     mpc_int32_t   SCFI_L [32];
    00131     mpc_int32_t   SCFI_R [32];                // describes order of transmitted SCF
    00132     mpc_int32_t   DSCF_Reference_L [32];
    00133     mpc_int32_t   DSCF_Reference_R [32];      // holds last frames SCF
    00134     mpc_int32_t   MS_Flag[32];                // MS used?
    00135 #ifdef MPC_FIXED_POINT
    00136     unsigned char SCF_shift[256];
    00137 #endif
    00138
    00139     MPC_SAMPLE_FORMAT V_L[MPC_V_MEM + 960];
    00140     MPC_SAMPLE_FORMAT V_R[MPC_V_MEM + 960];
    00141     MPC_SAMPLE_FORMAT Y_L[36][32];
    00142     MPC_SAMPLE_FORMAT Y_R[36][32];
    00143     MPC_SAMPLE_FORMAT SCF[256];
    00144
    00145
    00146 } mpc_decoder;
    00147
    00148 #endif // _mpc_decoder_h