| 1 | const SWB_OFFSET_48K_LONG: [usize; 49+1] = [ |
| 2 | 0, 4, 8, 12, 16, 20, 24, 28, |
| 3 | 32, 36, 40, 48, 56, 64, 72, 80, |
| 4 | 88, 96, 108, 120, 132, 144, 160, 176, |
| 5 | 196, 216, 240, 264, 292, 320, 352, 384, |
| 6 | 416, 448, 480, 512, 544, 576, 608, 640, |
| 7 | 672, 704, 736, 768, 800, 832, 864, 896, |
| 8 | 928, 1024 |
| 9 | ]; |
| 10 | const SWB_OFFSET_48K_SHORT: [usize; 14+1] = [ |
| 11 | 0, 4, 8, 12, 16, 20, 28, 36, 44, 56, 68, 80, 96, 112, 128 |
| 12 | ]; |
| 13 | const SWB_OFFSET_32K_LONG: [usize; 51+1] = [ |
| 14 | 0, 4, 8, 12, 16, 20, 24, 28, |
| 15 | 32, 36, 40, 48, 56, 64, 72, 80, |
| 16 | 88, 96, 108, 120, 132, 144, 160, 176, |
| 17 | 196, 216, 240, 264, 292, 320, 352, 384, |
| 18 | 416, 448, 480, 512, 544, 576, 608, 640, |
| 19 | 672, 704, 736, 768, 800, 832, 864, 896, |
| 20 | 928, 960, 992, 1024 |
| 21 | ]; |
| 22 | const SWB_OFFSET_8K_LONG: [usize; 40+1] = [ |
| 23 | 0, 12, 24, 36, 48, 60, 72, 84, |
| 24 | 96, 108, 120, 132, 144, 156, 172, 188, |
| 25 | 204, 220, 236, 252, 268, 288, 308, 328, |
| 26 | 348, 372, 396, 420, 448, 476, 508, 544, |
| 27 | 580, 620, 664, 712, 764, 820, 880, 944, |
| 28 | 1024 |
| 29 | ]; |
| 30 | const SWB_OFFSET_8K_SHORT: [usize; 15+1] = [ |
| 31 | 0, 4, 8, 12, 16, 20, 24, 28, 36, 44, 52, 60, 72, 88, 108, 128 |
| 32 | ]; |
| 33 | const SWB_OFFSET_16K_LONG: [usize; 43+1] = [ |
| 34 | 0, 8, 16, 24, 32, 40, 48, 56, |
| 35 | 64, 72, 80, 88, 100, 112, 124, 136, |
| 36 | 148, 160, 172, 184, 196, 212, 228, 244, |
| 37 | 260, 280, 300, 320, 344, 368, 396, 424, |
| 38 | 456, 492, 532, 572, 616, 664, 716, 772, |
| 39 | 832, 896, 960, 1024 |
| 40 | ]; |
| 41 | const SWB_OFFSET_16K_SHORT: [usize; 15+1] = [ |
| 42 | 0, 4, 8, 12, 16, 20, 24, 28, 32, 40, 48, 60, 72, 88, 108, 128 |
| 43 | ]; |
| 44 | const SWB_OFFSET_24K_LONG: [usize; 47+1] = [ |
| 45 | 0, 4, 8, 12, 16, 20, 24, 28, |
| 46 | 32, 36, 40, 44, 52, 60, 68, 76, |
| 47 | 84, 92, 100, 108, 116, 124, 136, 148, |
| 48 | 160, 172, 188, 204, 220, 240, 260, 284, |
| 49 | 308, 336, 364, 396, 432, 468, 508, 552, |
| 50 | 600, 652, 704, 768, 832, 896, 960, 1024 |
| 51 | ]; |
| 52 | const SWB_OFFSET_24K_SHORT: [usize; 15+1] = [ |
| 53 | 0, 4, 8, 12, 16, 20, 24, 28, 36, 44, 52, 64, 76, 92, 108, 128 |
| 54 | ]; |
| 55 | const SWB_OFFSET_64K_LONG: [usize; 47+1] = [ |
| 56 | 0, 4, 8, 12, 16, 20, 24, 28, |
| 57 | 32, 36, 40, 44, 48, 52, 56, 64, |
| 58 | 72, 80, 88, 100, 112, 124, 140, 156, |
| 59 | 172, 192, 216, 240, 268, 304, 344, 384, |
| 60 | 424, 464, 504, 544, 584, 624, 664, 704, |
| 61 | 744, 784, 824, 864, 904, 944, 984, 1024 |
| 62 | ]; |
| 63 | const SWB_OFFSET_64K_SHORT: [usize; 12+1] = [ |
| 64 | 0, 4, 8, 12, 16, 20, 24, 32, 40, 48, 64, 92, 128 |
| 65 | ]; |
| 66 | const SWB_OFFSET_96K_LONG: [usize; 41+1] = [ |
| 67 | 0, 4, 8, 12, 16, 20, 24, 28, |
| 68 | 32, 36, 40, 44, 48, 52, 56, 64, |
| 69 | 72, 80, 88, 96, 108, 120, 132, 144, |
| 70 | 156, 172, 188, 212, 240, 276, 320, 384, |
| 71 | 448, 512, 576, 640, 704, 768, 832, 896, |
| 72 | 960, 1024 |
| 73 | ]; |
| 74 | |
| 75 | #[derive(Clone,Copy)] |
| 76 | pub struct GASubbandInfo { |
| 77 | pub min_srate: u32, |
| 78 | pub long_bands: &'static [usize], |
| 79 | pub short_bands: &'static [usize], |
| 80 | } |
| 81 | |
| 82 | impl GASubbandInfo { |
| 83 | pub fn find(srate: u32) -> GASubbandInfo { |
| 84 | for sbi in AAC_SUBBAND_INFO.iter() { |
| 85 | if srate >= sbi.min_srate { |
| 86 | return *sbi; |
| 87 | } |
| 88 | } |
| 89 | unreachable!("") |
| 90 | } |
| 91 | pub fn find_idx(srate: u32) -> usize { |
| 92 | for (i, sbi) in AAC_SUBBAND_INFO.iter().enumerate() { |
| 93 | if srate >= sbi.min_srate { |
| 94 | return i; |
| 95 | } |
| 96 | } |
| 97 | unreachable!("") |
| 98 | } |
| 99 | } |
| 100 | |
| 101 | pub const AAC_SUBBAND_INFO: [GASubbandInfo; 12] = [ |
| 102 | GASubbandInfo { min_srate: 92017, long_bands: &SWB_OFFSET_96K_LONG, short_bands: &SWB_OFFSET_64K_SHORT }, //96K |
| 103 | GASubbandInfo { min_srate: 75132, long_bands: &SWB_OFFSET_96K_LONG, short_bands: &SWB_OFFSET_64K_SHORT }, //88.2K |
| 104 | GASubbandInfo { min_srate: 55426, long_bands: &SWB_OFFSET_64K_LONG, short_bands: &SWB_OFFSET_64K_SHORT }, //64K |
| 105 | GASubbandInfo { min_srate: 46009, long_bands: &SWB_OFFSET_48K_LONG, short_bands: &SWB_OFFSET_48K_SHORT }, //48K |
| 106 | GASubbandInfo { min_srate: 37566, long_bands: &SWB_OFFSET_48K_LONG, short_bands: &SWB_OFFSET_48K_SHORT }, //44.1K |
| 107 | GASubbandInfo { min_srate: 27713, long_bands: &SWB_OFFSET_32K_LONG, short_bands: &SWB_OFFSET_48K_SHORT }, //32K |
| 108 | GASubbandInfo { min_srate: 23004, long_bands: &SWB_OFFSET_24K_LONG, short_bands: &SWB_OFFSET_24K_SHORT }, //24K |
| 109 | GASubbandInfo { min_srate: 18783, long_bands: &SWB_OFFSET_24K_LONG, short_bands: &SWB_OFFSET_24K_SHORT }, //22.05K |
| 110 | GASubbandInfo { min_srate: 13856, long_bands: &SWB_OFFSET_16K_LONG, short_bands: &SWB_OFFSET_16K_SHORT }, //16K |
| 111 | GASubbandInfo { min_srate: 11502, long_bands: &SWB_OFFSET_16K_LONG, short_bands: &SWB_OFFSET_16K_SHORT }, //12K |
| 112 | GASubbandInfo { min_srate: 9391, long_bands: &SWB_OFFSET_16K_LONG, short_bands: &SWB_OFFSET_16K_SHORT }, //11.025K |
| 113 | GASubbandInfo { min_srate: 0, long_bands: &SWB_OFFSET_8K_LONG, short_bands: &SWB_OFFSET_8K_SHORT }, //8K |
| 114 | ]; |