apps/codecs/libatrac/atrac3.h

   1 #include "ffmpeg_bitstream.h"
   2 #include "../librm/rm.h"
   3
   4 #if (CONFIG_CPU == PP5022) || (CONFIG_CPU == PP5024) || (CONFIG_CPU == MCF5250)
   5 /* PP5022/24 and MCF5250 have larger IRAM */
   6 #define IBSS_ATTR_LARGE_IRAM  IBSS_ATTR
   7 #define ICODE_ATTR_LARGE_IRAM ICODE_ATTR
   8 #else
   9 /* other CPUs IRAM is not large enough */
  10 #define IBSS_ATTR_LARGE_IRAM
  11 #define ICODE_ATTR_LARGE_IRAM
  12 #endif
  13
  14 /* These structures are needed to store the parsed gain control data. */
  15 typedef struct {
  16     int   num_gain_data;
  17     int   levcode[8];
  18     int   loccode[8];
  19 } gain_info;
  20
  21 typedef struct {
  22     gain_info   gBlock[4];
  23 } gain_block;
  24
  25 typedef struct {
  26     int     pos;
  27     int     numCoefs;
  28     int32_t coef[8];
  29 } tonal_component;
  30
  31 typedef struct {
  32     int               bandsCoded;
  33     int               numComponents;
  34     tonal_component   components[64];
  35     int32_t           *prevFrame;
  36     int               gcBlkSwitch;
  37     gain_block        gainBlock[2];
  38
  39     int32_t           *spectrum;
  40     int32_t           *IMDCT_buf;
  41
  42     int32_t           delayBuf1[46]; ///<qmf delay buffers
  43     int32_t           delayBuf2[46];
  44     int32_t           delayBuf3[46];
  45 } channel_unit;
  46
  47 typedef struct {
  48     GetBitContext       gb;
  49     //@{
  50     /** stream data */
  51     int                 channels;
  52     int                 codingMode;
  53     int                 bit_rate;
  54     int                 sample_rate;
  55     int                 samples_per_channel;
  56     int                 samples_per_frame;
  57
  58     int                 bits_per_frame;
  59     int                 bytes_per_frame;
  60     int                 pBs;
  61     channel_unit*       pUnits;
  62     //@}
  63     //@{
  64     /** joint-stereo related variables */
  65     int                 matrix_coeff_index_prev[4];
  66     int                 matrix_coeff_index_now[4];
  67     int                 matrix_coeff_index_next[4];
  68     int                 weighting_delay[6];
  69     //@}
  70     //@{
  71     /** data buffers */
  72     int32_t             outSamples[2048];
  73     uint8_t             decoded_bytes_buffer[1024];
  74     int32_t             tempBuf[1070];
  75     //@}
  76     //@{
  77     /** extradata */
  78     int                 atrac3version;
  79     int                 delay;
  80     int                 scrambled_stream;
  81     int                 frame_factor;
  82     //@}
  83 } ATRAC3Context;
  84
  85 int atrac3_decode_init(ATRAC3Context *q, RMContext *rmctx);
  86
  87 int atrac3_decode_frame(RMContext *rmctx, ATRAC3Context *q,
  88                         int *data_size, const uint8_t *buf, int buf_size);
  89