| /************************* MPEG-2 NBC Audio Decoder ************************** |
| * * |
| "This software module was originally developed by |
| AT&T, Dolby Laboratories, Fraunhofer Gesellschaft IIS and edited by |
| Yoshiaki Oikawa (Sony Corporation) |
| ,Mitsuyuki Hatanaka (Sony Corporation), |
| in the course of development of the MPEG-2 NBC/MPEG-4 Audio standard ISO/IEC 13818-7, |
| 14496-1,2 and 3. This software module is an implementation of a part of one or more |
| MPEG-2 NBC/MPEG-4 Audio tools as specified by the MPEG-2 NBC/MPEG-4 |
| Audio standard. ISO/IEC gives users of the MPEG-2 NBC/MPEG-4 Audio |
| standards free license to this software module or modifications thereof for use in |
| hardware or software products claiming conformance to the MPEG-2 NBC/MPEG-4 |
| Audio standards. Those intending to use this software module in hardware or |
| software products are advised that this use may infringe existing patents. |
| The original developer of this software module and his/her company, the subsequent |
| editors and their companies, and ISO/IEC have no liability for use of this software |
| module or modifications thereof in an implementation. Copyright is not released for |
| non MPEG-2 NBC/MPEG-4 Audio conforming products.The original developer |
| retains full right to use the code for his/her own purpose, assign or donate the |
| code to a third party and to inhibit third party from using the code for non |
| MPEG-2 NBC/MPEG-4 Audio conforming products. This copyright notice must |
| be included in all copies or derivative works." |
| Copyright(c)1996. |
| * * |
| ****************************************************************************/ |
| |
| #include "all.h" |
| |
| Hcb book[NSPECBOOKS+2]; |
| int sfbwidth128[(1<<LEN_MAX_SFBS)]; |
| |
| const int SampleRates[] = { |
| 96000,88200,64000,48000,44100,32000,24000,22050,16000,12000,11025,8000,7350,0,0,0 |
| }; |
| |
| /* Returns the sample rate index */ |
| int get_sr_index(unsigned int sampleRate) |
| { |
| if (92017 <= sampleRate) return 0; |
| if (75132 <= sampleRate) return 1; |
| if (55426 <= sampleRate) return 2; |
| if (46009 <= sampleRate) return 3; |
| if (37566 <= sampleRate) return 4; |
| if (27713 <= sampleRate) return 5; |
| if (23004 <= sampleRate) return 6; |
| if (18783 <= sampleRate) return 7; |
| if (13856 <= sampleRate) return 8; |
| if (11502 <= sampleRate) return 9; |
| if (9391 <= sampleRate) return 10; |
| |
| return 11; |
| } |
| static int sfb_96_1024[] = |
| { |
| 4, 8, 12, 16, 20, 24, 28, |
| 32, 36, 40, 44, 48, 52, 56, |
| 64, 72, 80, 88, 96, 108, 120, |
| 132, 144, 156, 172, 188, 212, 240, |
| 276, 320, 384, 448, 512, 576, 640, |
| 704, 768, 832, 896, 960, 1024 |
| }; /* 41 scfbands */ |
| |
| static int sfb_96_128[] = |
| { |
| 4, 8, 12, 16, 20, 24, 32, |
| 40, 48, 64, 92, 128 |
| }; /* 12 scfbands */ |
| |
| static int sfb_64_1024[] = |
| { |
| 4, 8, 12, 16, 20, 24, 28, |
| 32, 36, 40, 44, 48, 52, 56, |
| 64, 72, 80, 88, 100, 112, 124, |
| 140, 156, 172, 192, 216, 240, 268, |
| 304, 344, 384, 424, 464, 504, 544, |
| 584, 624, 664, 704, 744, 784, 824, |
| 864, 904, 944, 984, 1024 |
| }; /* 41 scfbands 47 */ |
| |
| static int sfb_64_128[] = |
| { |
| 4, 8, 12, 16, 20, 24, 32, |
| 40, 48, 64, 92, 128 |
| }; /* 12 scfbands */ |
| |
| |
| static int sfb_48_1024[] = |
| { |
| 4, 8, 12, 16, 20, 24, 28, |
| 32, 36, 40, 48, 56, 64, 72, |
| 80, 88, 96, 108, 120, 132, 144, |
| 160, 176, 196, 216, 240, 264, 292, |
| 320, 352, 384, 416, 448, 480, 512, |
| 544, 576, 608, 640, 672, 704, 736, |
| 768, 800, 832, 864, 896, 928, 1024 |
| }; |
| |
| static int sfb_48_128[] = |
| { |
| 4, 8, 12, 16, 20, 28, 36, |
| 44, 56, 68, 80, 96, 112, 128 |
| }; |
| |
| static int sfb_32_1024[] = |
| { |
| 4, 8, 12, 16, 20, 24, 28, |
| 32, 36, 40, 48, 56, 64, 72, |
| 80, 88, 96, 108, 120, 132, 144, |
| 160, 176, 196, 216, 240, 264, 292, |
| 320, 352, 384, 416, 448, 480, 512, |
| 544, 576, 608, 640, 672, 704, 736, |
| 768, 800, 832, 864, 896, 928, 960, |
| 992, 1024 |
| }; |
| |
| static int sfb_24_1024[] = |
| { |
| 4, 8, 12, 16, 20, 24, 28, |
| 32, 36, 40, 44, 52, 60, 68, |
| 76, 84, 92, 100, 108, 116, 124, |
| 136, 148, 160, 172, 188, 204, 220, |
| 240, 260, 284, 308, 336, 364, 396, |
| 432, 468, 508, 552, 600, 652, 704, |
| 768, 832, 896, 960, 1024 |
| }; /* 47 scfbands */ |
| |
| static int sfb_24_128[] = |
| { |
| 4, 8, 12, 16, 20, 24, 28, |
| 36, 44, 52, 64, 76, 92, 108, |
| 128 |
| }; /* 15 scfbands */ |
| |
| static int sfb_16_1024[] = |
| { |
| 8, 16, 24, 32, 40, 48, 56, |
| 64, 72, 80, 88, 100, 112, 124, |
| 136, 148, 160, 172, 184, 196, 212, |
| 228, 244, 260, 280, 300, 320, 344, |
| 368, 396, 424, 456, 492, 532, 572, |
| 616, 664, 716, 772, 832, 896, 960, |
| 1024 |
| }; /* 43 scfbands */ |
| |
| static int sfb_16_128[] = |
| { |
| 4, 8, 12, 16, 20, 24, 28, |
| 32, 40, 48, 60, 72, 88, 108, |
| 128 |
| }; /* 15 scfbands */ |
| |
| static int sfb_8_1024[] = |
| { |
| 12, 24, 36, 48, 60, 72, 84, |
| 96, 108, 120, 132, 144, 156, 172, |
| 188, 204, 220, 236, 252, 268, 288, |
| 308, 328, 348, 372, 396, 420, 448, |
| 476, 508, 544, 580, 620, 664, 712, |
| 764, 820, 880, 944, 1024 |
| }; /* 40 scfbands */ |
| |
| static int sfb_8_128[] = |
| { |
| 4, 8, 12, 16, 20, 24, 28, |
| 36, 44, 52, 60, 72, 88, 108, |
| 128 |
| }; /* 15 scfbands */ |
| |
| SR_Info samp_rate_info[(1<<LEN_SAMP_IDX)] = |
| { |
| /* sampling_frequency, #long sfb, long sfb, #short sfb, short sfb */ |
| /* samp_rate, nsfb1024, SFbands1024, nsfb128, SFbands128 */ |
| {96000, 41, sfb_96_1024, 12, sfb_96_128}, /* 96000 */ |
| {88200, 41, sfb_96_1024, 12, sfb_96_128}, /* 88200 */ |
| {64000, 47, sfb_64_1024, 12, sfb_64_128}, /* 64000 */ |
| {48000, 49, sfb_48_1024, 14, sfb_48_128}, /* 48000 */ |
| {44100, 49, sfb_48_1024, 14, sfb_48_128}, /* 44100 */ |
| {32000, 51, sfb_32_1024, 14, sfb_48_128}, /* 32000 */ |
| {24000, 47, sfb_24_1024, 15, sfb_24_128}, /* 24000 */ |
| {22050, 47, sfb_24_1024, 15, sfb_24_128}, /* 22050 */ |
| {16000, 43, sfb_16_1024, 15, sfb_16_128}, /* 16000 */ |
| {12000, 43, sfb_16_1024, 15, sfb_16_128}, /* 12000 */ |
| {11025, 43, sfb_16_1024, 15, sfb_16_128}, /* 11025 */ |
| {8000, 40, sfb_8_1024, 15, sfb_8_128 }, /* 8000 */ |
| {0,0,0,0,0}, |
| {0,0,0,0,0}, |
| {0,0,0,0,0}, |
| {0,0,0,0,0} |
| }; |
| |
| int tns_max_bands_tbl[(1<<LEN_SAMP_IDX)][4] = |
| { |
| /* entry for each sampling rate |
| * 1 Main/LC long window |
| * 2 Main/LC short window |
| * 3 SSR long window |
| * 4 SSR short window |
| */ |
| {31, 9, 28, 7}, /* 96000 */ |
| {31, 9, 28, 7}, /* 88200 */ |
| {34, 10, 27, 7}, /* 64000 */ |
| {40, 14, 26, 6}, /* 48000 */ |
| {42, 14, 26, 6}, /* 44100 */ |
| {51, 14, 26, 6}, /* 32000 */ |
| {46, 14, 29, 7}, /* 24000 */ |
| {46, 14, 29, 7}, /* 22050 */ |
| {42, 14, 23, 8}, /* 16000 */ |
| {42, 14, 23, 8}, /* 12000 */ |
| {42, 14, 23, 8}, /* 11025 */ |
| {39, 14, 19, 7}, /* 8000 */ |
| {0,0,0,0}, |
| {0,0,0,0}, |
| {0,0,0,0}, |
| {0,0,0,0} |
| }; |
| |
| int pred_max_bands_tbl[(1<<LEN_SAMP_IDX)] = { |
| 33, /* 96000 */ |
| 33, /* 88200 */ |
| 38, /* 64000 */ |
| 40, /* 48000 */ |
| 40, /* 44100 */ |
| 40, /* 32000 */ |
| 41, /* 24000 */ |
| 41, /* 22050 */ |
| 37, /* 16000 */ |
| 37, /* 12000 */ |
| 37, /* 11025 */ |
| 34, /* 8000 */ |
| 0, |
| 0, |
| 0, |
| 0 |
| }; |
