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static const uint8_t bfu_amount_tab1[8] = {20, 28, 32, 36, 40, 44, 48, 52};
static const uint8_t bfu_amount_tab2[4] = { 0, 112, 176, 208};
static const uint8_t bfu_amount_tab3[8] = { 0, 24, 36, 48, 72, 108, 132, 156};
/** number of BFUs in each QMF band */
static const uint8_t bfu_bands_t[4] = {0, 20, 36, 52};
/** number of spectral lines in each BFU
* block floating unit = group of spectral frequencies having the
* same quantization parameters like word length and scale factor
*/
static const uint8_t specs_per_bfu[52] = {
8, 8, 8, 8, 4, 4, 4, 4, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, // low band
6, 6, 6, 6, 7, 7, 7, 7, 9, 9, 9, 9, 10, 10, 10, 10, // midle band
12, 12, 12, 12, 12, 12, 12, 12, 20, 20, 20, 20, 20, 20, 20, 20 // high band
};
/** start position of each BFU in the MDCT spectrum for the long mode */
static const uint16_t bfu_start_long[52] = {
0, 8, 16, 24, 32, 36, 40, 44, 48, 56, 64, 72, 80, 86, 92, 98, 104, 110, 116, 122,
128, 134, 140, 146, 152, 159, 166, 173, 180, 189, 198, 207, 216, 226, 236, 246,
256, 268, 280, 292, 304, 316, 328, 340, 352, 372, 392, 412, 432, 452, 472, 492,
};
/** start position of each BFU in the MDCT spectrum for the short mode */
static const uint16_t bfu_start_short[52] = {
0, 32, 64, 96, 8, 40, 72, 104, 12, 44, 76, 108, 20, 52, 84, 116, 26, 58, 90, 122,
128, 160, 192, 224, 134, 166, 198, 230, 141, 173, 205, 237, 150, 182, 214, 246,
256, 288, 320, 352, 384, 416, 448, 480, 268, 300, 332, 364, 396, 428, 460, 492
};
#endif /* AVCODEC_ATRAC1DATA_H */ |