1 files changed, 114 insertions, 0 deletions
diff --git a/src/libmusepack/musepack/decoder.h b/src/libmusepack/musepack/decoder.h
new file mode 100644
index 000000000..08c316390
--- /dev/null
+++ b/src/libmusepack/musepack/decoder.h
@@ -0,0 +1,114 @@
+/// \file decoder.h
+
+#ifndef _musepack_decoder_h_
+#define _musepack_decoder_h_
+
+#include "musepack/huffman.h"
+#include "musepack/math.h"
+#include "musepack/musepack.h"
+#include "musepack/reader.h"
+#include "musepack/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