apps/codecs/libatrac/atrac3.h

   1 #include "ffmpeg_bitstream.h"
   2 #include "../librm/rm.h"
   3
   4 /* These structures are needed to store the parsed gain control data. */
   5 typedef struct {
   6     int   num_gain_data;
   7     int   levcode[8];
   8     int   loccode[8];
   9 } gain_info;
  10
  11 typedef struct {
  12     gain_info   gBlock[4];
  13 } gain_block;
  14
  15 typedef struct {
  16     int     pos;
  17     int     numCoefs;
  18     int32_t coef[8];
  19 } tonal_component;
  20
  21 typedef struct {
  22     int               bandsCoded;
  23     int               numComponents;
  24     tonal_component   components[64];
  25     int32_t           prevFrame[1024];
  26     int               gcBlkSwitch;
  27     gain_block        gainBlock[2];
  28
  29     int32_t           spectrum[1024] __attribute__((aligned(16)));
  30     int32_t           IMDCT_buf[1024] __attribute__((aligned(16)));
  31
  32     int32_t           delayBuf1[46]; ///<qmf delay buffers
  33     int32_t           delayBuf2[46];
  34     int32_t           delayBuf3[46];
  35 } channel_unit;
  36
  37 typedef struct {
  38     GetBitContext       gb;
  39     //@{
  40     /** stream data */
  41     int                 channels;
  42     int                 codingMode;
  43     int                 bit_rate;
  44     int                 sample_rate;
  45     int                 samples_per_channel;
  46     int                 samples_per_frame;
  47
  48     int                 bits_per_frame;
  49     int                 bytes_per_frame;
  50     int                 pBs;
  51     channel_unit*       pUnits;
  52     //@}
  53     //@{
  54     /** joint-stereo related variables */
  55     int                 matrix_coeff_index_prev[4];
  56     int                 matrix_coeff_index_now[4];
  57     int                 matrix_coeff_index_next[4];
  58     int                 weighting_delay[6];
  59     //@}
  60     //@{
  61     /** data buffers */
  62     int32_t             outSamples[2048];
  63     uint8_t             decoded_bytes_buffer[1024];
  64     int32_t             tempBuf[1070];
  65     //@}
  66     //@{
  67     /** extradata */
  68     int                 atrac3version;
  69     int                 delay;
  70     int                 scrambled_stream;
  71     int                 frame_factor;
  72     //@}
  73 } ATRAC3Context;
  74
  75 int atrac3_decode_init(ATRAC3Context *q, RMContext *rmctx);
  76
  77 int atrac3_decode_frame(RMContext *rmctx, ATRAC3Context *q,
  78                         void *data, int *data_size,
  79                         const uint8_t *buf, int buf_size);
  80