libavcodec/atrac1data.h File Reference

Atrac 1 compatible decoder data. More...

#include <stdint.h>

Go to the source code of this file.

Variables
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}
static const uint8_t	bfu_bands_t [4] = {0, 20, 36, 52}
	number of BFUs in each QMF band
static const uint8_t	specs_per_bfu [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 uint16_t	bfu_start_long [52]
	start position of each BFU in the MDCT spectrum for the long mode
static const uint16_t	bfu_start_short [52]
	start position of each BFU in the MDCT spectrum for the short mode

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Detailed Description

Atrac 1 compatible decoder data.

Definition in file atrac1data.h.

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Variable Documentation

const uint8_t bfu_amount_tab1[8] = {20, 28, 32, 36, 40, 44, 48, 52} [static]

Definition at line 33 of file atrac1data.h.

Referenced by at1_unpack_dequant().

const uint8_t bfu_amount_tab2[4] = { 0, 112, 176, 208} [static]

Definition at line 34 of file atrac1data.h.

Referenced by at1_unpack_dequant().

const uint8_t bfu_amount_tab3[8] = { 0, 24, 36, 48, 72, 108, 132, 156} [static]

Definition at line 35 of file atrac1data.h.

Referenced by at1_unpack_dequant().

const uint8_t bfu_bands_t[4] = {0, 20, 36, 52} [static]

number of BFUs in each QMF band

Definition at line 38 of file atrac1data.h.

Referenced by at1_unpack_dequant().

const uint16_t bfu_start_long[52] [static]

Initial value:

 {
      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 long mode

Definition at line 51 of file atrac1data.h.

Referenced by at1_unpack_dequant().

const uint16_t bfu_start_short[52] [static]

Initial value:

 {
      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
}

start position of each BFU in the MDCT spectrum for the short mode

Definition at line 58 of file atrac1data.h.

Referenced by at1_unpack_dequant().

const uint8_t specs_per_bfu[52] [static]

Initial value:

 {
     8,  8,  8,  8,  4,  4,  4,  4,  8,  8,  8,  8,  6,  6,  6,  6, 6, 6, 6, 6, 
     6,  6,  6,  6,  7,  7,  7,  7,  9,  9,  9,  9, 10, 10, 10, 10,             
    12, 12, 12, 12, 12, 12, 12, 12, 20, 20, 20, 20, 20, 20, 20, 20              
}

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

Definition at line 44 of file atrac1data.h.

Referenced by at1_unpack_dequant().