apps/codecs/libffmpegFLAC/shndec.h

   1 #include "bitstream.h"
   2
   3 #define SHN_OUTPUT_DEPTH 29 /* 28 bits + sign */
   4
   5 #define MAX_CHANNELS   2
   6 #define MAX_PRED_ORDER 16
   7 #define MAX_NWRAP      MAX_PRED_ORDER
   8 #define MAX_NMEAN      4
   9
  10 /* NUM_DEC_LOOPS should be even number */
  11 #define NUM_DEC_LOOPS      26
  12 #define DEFAULT_BLOCK_SIZE 256
  13 #define MAX_HEADER_SIZE    DEFAULT_BLOCK_SIZE*4
  14 #define MAX_BUFFER_SIZE    2*DEFAULT_BLOCK_SIZE*NUM_DEC_LOOPS
  15 #define MAX_DECODE_SIZE    ((DEFAULT_BLOCK_SIZE*NUM_DEC_LOOPS/2) + MAX_NWRAP)
  16 #define MAX_OFFSET_SIZE    MAX_NMEAN
  17
  18 #define FN_DIFF0     0
  19 #define FN_DIFF1     1
  20 #define FN_DIFF2     2
  21 #define FN_DIFF3     3
  22 #define FN_QUIT      4
  23 #define FN_BLOCKSIZE 5
  24 #define FN_BITSHIFT  6
  25 #define FN_QLPC      7
  26 #define FN_ZERO      8
  27 #define FN_VERBATIM  9
  28 #define FN_ERROR     10
  29
  30 typedef struct ShortenContext {
  31     GetBitContext gb;
  32     int32_t lpcqoffset;
  33     uint32_t totalsamples;
  34     int header_bits;
  35     int channels;
  36     int sample_rate;
  37     int bits_per_sample;
  38     int version;
  39     int bitshift;
  40     int last_bitshift;
  41     int nmean;
  42     int nwrap;
  43     int blocksize;
  44     int bitindex;
  45 } ShortenContext;
  46
  47 int shorten_init(ShortenContext* s, uint8_t *buf, int buf_size);
  48 int shorten_decode_frames(ShortenContext *s, int *nsamples,
  49                          int32_t *decoded0, int32_t *decoded1,
  50                          int32_t *offset0, int32_t *offset1,
  51                          uint8_t *buf, int buf_size,
  52                          void (*yield)(void)) ICODE_ATTR;