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/* |
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* Digital Speech Standard - Standard Play mode (DSS SP) audio decoder. |
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* Copyright (C) 2014 Oleksij Rempel <linux@rempel-privat.de> |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include "libavutil/channel_layout.h" |
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#include "libavutil/common.h" |
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#include "libavutil/mem.h" |
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#include "libavutil/opt.h" |
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#include "avcodec.h" |
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#include "get_bits.h" |
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#include "internal.h" |
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#define SUBFRAMES 4 |
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#define PULSE_MAX 8 |
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#define DSS_SP_FRAME_SIZE 42 |
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#define DSS_SP_SAMPLE_COUNT (66 * SUBFRAMES) |
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#define DSS_SP_FORMULA(a, b, c) ((int)((((a) * (1 << 15)) + (b) * (unsigned)(c)) + 0x4000) >> 15) |
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typedef struct DssSpSubframe { |
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int16_t gain; |
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int32_t combined_pulse_pos; |
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int16_t pulse_pos[7]; |
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int16_t pulse_val[7]; |
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} DssSpSubframe; |
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typedef struct DssSpFrame { |
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int16_t filter_idx[14]; |
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int16_t sf_adaptive_gain[SUBFRAMES]; |
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int16_t pitch_lag[SUBFRAMES]; |
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struct DssSpSubframe sf[SUBFRAMES]; |
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} DssSpFrame; |
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typedef struct DssSpContext { |
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AVCodecContext *avctx; |
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int32_t excitation[288 + 6]; |
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int32_t history[187]; |
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DssSpFrame fparam; |
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int32_t working_buffer[SUBFRAMES][72]; |
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int32_t audio_buf[15]; |
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int32_t err_buf1[15]; |
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int32_t lpc_filter[14]; |
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int32_t filter[15]; |
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int32_t vector_buf[72]; |
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int noise_state; |
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int32_t err_buf2[15]; |
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int pulse_dec_mode; |
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DECLARE_ALIGNED(16, uint8_t, bits)[DSS_SP_FRAME_SIZE + |
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AV_INPUT_BUFFER_PADDING_SIZE]; |
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} DssSpContext; |
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/* |
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* Used for the coding/decoding of the pulse positions for the MP-MLQ codebook. |
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*/ |
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static const uint32_t dss_sp_combinatorial_table[PULSE_MAX][72] = { |
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{ 0, 0, 0, 0, 0, 0, |
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0, 0, 0, 0, 0, 0, |
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0, 0, 0, 0, 0, 0, |
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0, 0, 0, 0, 0, 0, |
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0, 0, 0, 0, 0, 0, |
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0, 0, 0, 0, 0, 0, |
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0, 0, 0, 0, 0, 0, |
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0, 0, 0, 0, 0, 0, |
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0, 0, 0, 0, 0, 0, |
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0, 0, 0, 0, 0, 0, |
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0, 0, 0, 0, 0, 0, |
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0, 0, 0, 0, 0, 0 }, |
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{ 0, 1, 2, 3, 4, 5, |
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6, 7, 8, 9, 10, 11, |
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12, 13, 14, 15, 16, 17, |
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18, 19, 20, 21, 22, 23, |
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24, 25, 26, 27, 28, 29, |
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30, 31, 32, 33, 34, 35, |
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36, 37, 38, 39, 40, 41, |
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42, 43, 44, 45, 46, 47, |
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48, 49, 50, 51, 52, 53, |
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54, 55, 56, 57, 58, 59, |
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60, 61, 62, 63, 64, 65, |
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66, 67, 68, 69, 70, 71 }, |
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{ 0, 0, 1, 3, 6, 10, |
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15, 21, 28, 36, 45, 55, |
102 |
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66, 78, 91, 105, 120, 136, |
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153, 171, 190, 210, 231, 253, |
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276, 300, 325, 351, 378, 406, |
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435, 465, 496, 528, 561, 595, |
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630, 666, 703, 741, 780, 820, |
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861, 903, 946, 990, 1035, 1081, |
108 |
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1128, 1176, 1225, 1275, 1326, 1378, |
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1431, 1485, 1540, 1596, 1653, 1711, |
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1770, 1830, 1891, 1953, 2016, 2080, |
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2145, 2211, 2278, 2346, 2415, 2485 }, |
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{ 0, 0, 0, 1, 4, 10, |
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20, 35, 56, 84, 120, 165, |
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220, 286, 364, 455, 560, 680, |
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816, 969, 1140, 1330, 1540, 1771, |
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2024, 2300, 2600, 2925, 3276, 3654, |
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4060, 4495, 4960, 5456, 5984, 6545, |
118 |
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7140, 7770, 8436, 9139, 9880, 10660, |
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11480, 12341, 13244, 14190, 15180, 16215, |
120 |
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17296, 18424, 19600, 20825, 22100, 23426, |
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24804, 26235, 27720, 29260, 30856, 32509, |
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34220, 35990, 37820, 39711, 41664, 43680, |
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45760, 47905, 50116, 52394, 54740, 57155 }, |
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{ 0, 0, 0, 0, 1, 5, |
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15, 35, 70, 126, 210, 330, |
126 |
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495, 715, 1001, 1365, 1820, 2380, |
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3060, 3876, 4845, 5985, 7315, 8855, |
128 |
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10626, 12650, 14950, 17550, 20475, 23751, |
129 |
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27405, 31465, 35960, 40920, 46376, 52360, |
130 |
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58905, 66045, 73815, 82251, 91390, 101270, |
131 |
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111930, 123410, 135751, 148995, 163185, 178365, |
132 |
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194580, 211876, 230300, 249900, 270725, 292825, |
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316251, 341055, 367290, 395010, 424270, 455126, |
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487635, 521855, 557845, 595665, 635376, 677040, |
135 |
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720720, 766480, 814385, 864501, 916895, 971635 }, |
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{ 0, 0, 0, 0, 0, 1, |
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6, 21, 56, 126, 252, 462, |
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792, 1287, 2002, 3003, 4368, 6188, |
139 |
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8568, 11628, 15504, 20349, 26334, 33649, |
140 |
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42504, 53130, 65780, 80730, 98280, 118755, |
141 |
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142506, 169911, 201376, 237336, 278256, 324632, |
142 |
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376992, 435897, 501942, 575757, 658008, 749398, |
143 |
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850668, 962598, 1086008, 1221759, 1370754, 1533939, |
144 |
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1712304, 1906884, 2118760, 2349060, 2598960, 2869685, |
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3162510, 3478761, 3819816, 4187106, 4582116, 5006386, |
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5461512, 5949147, 6471002, 7028847, 7624512, 8259888, |
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8936928, 9657648, 10424128, 11238513, 12103014, 13019909 }, |
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{ 0, 0, 0, 0, 0, 0, |
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1, 7, 28, 84, 210, 462, |
150 |
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924, 1716, 3003, 5005, 8008, 12376, |
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18564, 27132, 38760, 54264, 74613, 100947, |
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134596, 177100, 230230, 296010, 376740, 475020, |
153 |
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593775, 736281, 906192, 1107568, 1344904, 1623160, |
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1947792, 2324784, 2760681, 3262623, 3838380, 4496388, |
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5245786, 6096454, 7059052, 8145060, 9366819, 10737573, |
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12271512, 13983816, 15890700, 18009460, 20358520, 22957480, |
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25827165, 28989675, 32468436, 36288252, 40475358, 45057474, |
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50063860, 55525372, 61474519, 67945521, 74974368, 82598880, |
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90858768, 99795696, 109453344, 119877472, 131115985, 143218999 }, |
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{ 0, 0, 0, 0, 0, 0, |
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0, 1, 8, 36, 120, 330, |
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792, 1716, 3432, 6435, 11440, 19448, |
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31824, 50388, 77520, 116280, 170544, 245157, |
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346104, 480700, 657800, 888030, 1184040, 1560780, |
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2035800, 2629575, 3365856, 4272048, 5379616, 6724520, |
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8347680, 10295472, 12620256, 15380937, 18643560, 22481940, |
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26978328, 32224114, 38320568, 45379620, 53524680, 62891499, |
168 |
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73629072, 85900584, 99884400, 115775100, 133784560, 154143080, |
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177100560, 202927725, 231917400, 264385836, 300674088, 341149446, |
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386206920, 436270780, 491796152, 553270671, 621216192, 696190560, |
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778789440, 869648208, 969443904, 1078897248, 1198774720, 1329890705 }, |
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}; |
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static const int16_t dss_sp_filter_cb[14][32] = { |
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{ -32653, -32587, -32515, -32438, -32341, -32216, -32062, -31881, |
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-31665, -31398, -31080, -30724, -30299, -29813, -29248, -28572, |
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-27674, -26439, -24666, -22466, -19433, -16133, -12218, -7783, |
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-2834, 1819, 6544, 11260, 16050, 20220, 24774, 28120 }, |
179 |
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180 |
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{ -27503, -24509, -20644, -17496, -14187, -11277, -8420, -5595, |
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-3013, -624, 1711, 3880, 5844, 7774, 9739, 11592, |
182 |
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13364, 14903, 16426, 17900, 19250, 20586, 21803, 23006, |
183 |
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24142, 25249, 26275, 27300, 28359, 29249, 30118, 31183 }, |
184 |
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185 |
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{ -27827, -24208, -20943, -17781, -14843, -11848, -9066, -6297, |
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-3660, -910, 1918, 5025, 8223, 11649, 15086, 18423, |
187 |
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0, 0, 0, 0, 0, 0, 0, 0, |
188 |
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0, 0, 0, 0, 0, 0, 0, 0 }, |
189 |
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190 |
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{ -17128, -11975, -8270, -5123, -2296, 183, 2503, 4707, |
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6798, 8945, 11045, 13239, 15528, 18248, 21115, 24785, |
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0, 0, 0, 0, 0, 0, 0, 0, |
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0, 0, 0, 0, 0, 0, 0, 0 }, |
194 |
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195 |
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{ -21557, -17280, -14286, -11644, -9268, -7087, -4939, -2831, |
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-691, 1407, 3536, 5721, 8125, 10677, 13721, 17731, |
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0, 0, 0, 0, 0, 0, 0, 0, |
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0, 0, 0, 0, 0, 0, 0, 0 }, |
199 |
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200 |
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{ -15030, -10377, -7034, -4327, -1900, 364, 2458, 4450, |
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6422, 8374, 10374, 12486, 14714, 16997, 19626, 22954, |
202 |
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0, 0, 0, 0, 0, 0, 0, 0, |
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0, 0, 0, 0, 0, 0, 0, 0 }, |
204 |
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205 |
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{ -16155, -12362, -9698, -7460, -5258, -3359, -1547, 219, |
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1916, 3599, 5299, 6994, 8963, 11226, 13716, 16982, |
207 |
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0, 0, 0, 0, 0, 0, 0, 0, |
208 |
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0, 0, 0, 0, 0, 0, 0, 0 }, |
209 |
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210 |
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{ -14742, -9848, -6921, -4648, -2769, -1065, 499, 2083, |
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3633, 5219, 6857, 8580, 10410, 12672, 15561, 20101, |
212 |
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0, 0, 0, 0, 0, 0, 0, 0, |
213 |
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0, 0, 0, 0, 0, 0, 0, 0 }, |
214 |
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215 |
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{ -11099, -7014, -3855, -1025, 1680, 4544, 7807, 11932, |
216 |
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0, 0, 0, 0, 0, 0, 0, 0, |
217 |
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0, 0, 0, 0, 0, 0, 0, 0, |
218 |
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0, 0, 0, 0, 0, 0, 0, 0 }, |
219 |
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220 |
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{ -9060, -4570, -1381, 1419, 4034, 6728, 9865, 14149, |
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0, 0, 0, 0, 0, 0, 0, 0, |
222 |
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0, 0, 0, 0, 0, 0, 0, 0, |
223 |
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0, 0, 0, 0, 0, 0, 0, 0 }, |
224 |
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225 |
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{ -12450, -7985, -4596, -1734, 961, 3629, 6865, 11142, |
226 |
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0, 0, 0, 0, 0, 0, 0, 0, |
227 |
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0, 0, 0, 0, 0, 0, 0, 0, |
228 |
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0, 0, 0, 0, 0, 0, 0, 0 }, |
229 |
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230 |
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{ -11831, -7404, -4010, -1096, 1606, 4291, 7386, 11482, |
231 |
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0, 0, 0, 0, 0, 0, 0, 0, |
232 |
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0, 0, 0, 0, 0, 0, 0, 0, |
233 |
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0, 0, 0, 0, 0, 0, 0, 0 }, |
234 |
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235 |
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{ -13404, -9250, -5995, -3312, -890, 1594, 4464, 8198, |
236 |
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0, 0, 0, 0, 0, 0, 0, 0, |
237 |
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0, 0, 0, 0, 0, 0, 0, 0, |
238 |
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0, 0, 0, 0, 0, 0, 0, 0 }, |
239 |
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240 |
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{ -11239, -7220, -4040, -1406, 971, 3321, 6006, 9697, |
241 |
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0, 0, 0, 0, 0, 0, 0, 0, |
242 |
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0, 0, 0, 0, 0, 0, 0, 0, |
243 |
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0, 0, 0, 0, 0, 0, 0, 0 }, |
244 |
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}; |
245 |
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246 |
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static const uint16_t dss_sp_fixed_cb_gain[64] = { |
247 |
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0, 4, 8, 13, 17, 22, 26, 31, |
248 |
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35, 40, 44, 48, 53, 58, 63, 69, |
249 |
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76, 83, 91, 99, 109, 119, 130, 142, |
250 |
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155, 170, 185, 203, 222, 242, 265, 290, |
251 |
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317, 346, 378, 414, 452, 494, 540, 591, |
252 |
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646, 706, 771, 843, 922, 1007, 1101, 1204, |
253 |
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1316, 1438, 1572, 1719, 1879, 2053, 2244, 2453, |
254 |
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2682, 2931, 3204, 3502, 3828, 4184, 4574, 5000, |
255 |
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}; |
256 |
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257 |
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static const int16_t dss_sp_pulse_val[8] = { |
258 |
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-31182, -22273, -13364, -4455, 4455, 13364, 22273, 31182 |
259 |
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}; |
260 |
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261 |
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static const uint16_t binary_decreasing_array[] = { |
262 |
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32767, 16384, 8192, 4096, 2048, 1024, 512, 256, |
263 |
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128, 64, 32, 16, 8, 4, 2, |
264 |
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}; |
265 |
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266 |
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static const uint16_t dss_sp_unc_decreasing_array[] = { |
267 |
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32767, 26214, 20972, 16777, 13422, 10737, 8590, 6872, |
268 |
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5498, 4398, 3518, 2815, 2252, 1801, 1441, |
269 |
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}; |
270 |
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|
271 |
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static const uint16_t dss_sp_adaptive_gain[] = { |
272 |
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102, 231, 360, 488, 617, 746, 875, 1004, |
273 |
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1133, 1261, 1390, 1519, 1648, 1777, 1905, 2034, |
274 |
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2163, 2292, 2421, 2550, 2678, 2807, 2936, 3065, |
275 |
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3194, 3323, 3451, 3580, 3709, 3838, 3967, 4096, |
276 |
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}; |
277 |
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|
278 |
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static const int32_t dss_sp_sinc[67] = { |
279 |
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262, 293, 323, 348, 356, 336, 269, 139, |
280 |
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-67, -358, -733, -1178, -1668, -2162, -2607, -2940, |
281 |
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-3090, -2986, -2562, -1760, -541, 1110, 3187, 5651, |
282 |
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8435, 11446, 14568, 17670, 20611, 23251, 25460, 27125, |
283 |
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28160, 28512, 28160, |
284 |
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27125, 25460, 23251, 20611, 17670, 14568, 11446, 8435, |
285 |
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5651, 3187, 1110, -541, -1760, -2562, -2986, -3090, |
286 |
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-2940, -2607, -2162, -1668, -1178, -733, -358, -67, |
287 |
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139, 269, 336, 356, 348, 323, 293, 262, |
288 |
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}; |
289 |
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|
290 |
|
2 |
static av_cold int dss_sp_decode_init(AVCodecContext *avctx) |
291 |
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{ |
292 |
|
2 |
DssSpContext *p = avctx->priv_data; |
293 |
|
2 |
avctx->channel_layout = AV_CH_LAYOUT_MONO; |
294 |
|
2 |
avctx->sample_fmt = AV_SAMPLE_FMT_S16; |
295 |
|
2 |
avctx->channels = 1; |
296 |
|
2 |
avctx->sample_rate = 11025; |
297 |
|
|
|
298 |
|
2 |
memset(p->history, 0, sizeof(p->history)); |
299 |
|
2 |
p->pulse_dec_mode = 1; |
300 |
|
2 |
p->avctx = avctx; |
301 |
|
|
|
302 |
|
2 |
return 0; |
303 |
|
|
} |
304 |
|
|
|
305 |
|
30 |
static void dss_sp_unpack_coeffs(DssSpContext *p, const uint8_t *src) |
306 |
|
|
{ |
307 |
|
|
GetBitContext gb; |
308 |
|
30 |
DssSpFrame *fparam = &p->fparam; |
309 |
|
|
int i; |
310 |
|
|
int subframe_idx; |
311 |
|
|
uint32_t combined_pitch; |
312 |
|
|
uint32_t tmp; |
313 |
|
|
uint32_t pitch_lag; |
314 |
|
|
|
315 |
✓✓ |
660 |
for (i = 0; i < DSS_SP_FRAME_SIZE; i += 2) { |
316 |
|
630 |
p->bits[i] = src[i + 1]; |
317 |
|
630 |
p->bits[i + 1] = src[i]; |
318 |
|
|
} |
319 |
|
|
|
320 |
|
30 |
init_get_bits(&gb, p->bits, DSS_SP_FRAME_SIZE * 8); |
321 |
|
|
|
322 |
✓✓ |
90 |
for (i = 0; i < 2; i++) |
323 |
|
60 |
fparam->filter_idx[i] = get_bits(&gb, 5); |
324 |
✓✓ |
210 |
for (; i < 8; i++) |
325 |
|
180 |
fparam->filter_idx[i] = get_bits(&gb, 4); |
326 |
✓✓ |
210 |
for (; i < 14; i++) |
327 |
|
180 |
fparam->filter_idx[i] = get_bits(&gb, 3); |
328 |
|
|
|
329 |
✓✓ |
150 |
for (subframe_idx = 0; subframe_idx < 4; subframe_idx++) { |
330 |
|
120 |
fparam->sf_adaptive_gain[subframe_idx] = get_bits(&gb, 5); |
331 |
|
|
|
332 |
|
120 |
fparam->sf[subframe_idx].combined_pulse_pos = get_bits_long(&gb, 31); |
333 |
|
|
|
334 |
|
120 |
fparam->sf[subframe_idx].gain = get_bits(&gb, 6); |
335 |
|
|
|
336 |
✓✓ |
960 |
for (i = 0; i < 7; i++) |
337 |
|
840 |
fparam->sf[subframe_idx].pulse_val[i] = get_bits(&gb, 3); |
338 |
|
|
} |
339 |
|
|
|
340 |
✓✓ |
150 |
for (subframe_idx = 0; subframe_idx < 4; subframe_idx++) { |
341 |
|
120 |
unsigned int C72_binomials[PULSE_MAX] = { |
342 |
|
|
72, 2556, 59640, 1028790, 13991544, 156238908, 1473109704, |
343 |
|
|
3379081753 |
344 |
|
|
}; |
345 |
|
120 |
unsigned int combined_pulse_pos = |
346 |
|
120 |
fparam->sf[subframe_idx].combined_pulse_pos; |
347 |
|
120 |
int index = 6; |
348 |
|
|
|
349 |
✓✗ |
120 |
if (combined_pulse_pos < C72_binomials[PULSE_MAX - 1]) { |
350 |
✓✗ |
120 |
if (p->pulse_dec_mode) { |
351 |
|
|
int pulse, pulse_idx; |
352 |
|
120 |
pulse = PULSE_MAX - 1; |
353 |
|
120 |
pulse_idx = 71; |
354 |
|
120 |
combined_pulse_pos = |
355 |
|
120 |
fparam->sf[subframe_idx].combined_pulse_pos; |
356 |
|
|
|
357 |
|
|
/* this part seems to be close to g723.1 gen_fcb_excitation() |
358 |
|
|
* RATE_6300 */ |
359 |
|
|
|
360 |
|
|
/* TODO: what is 7? size of subframe? */ |
361 |
✓✓ |
960 |
for (i = 0; i < 7; i++) { |
362 |
|
840 |
for (; |
363 |
|
|
combined_pulse_pos < |
364 |
✓✓ |
8070 |
dss_sp_combinatorial_table[pulse][pulse_idx]; |
365 |
|
7230 |
--pulse_idx) |
366 |
|
|
; |
367 |
|
840 |
combined_pulse_pos -= |
368 |
|
840 |
dss_sp_combinatorial_table[pulse][pulse_idx]; |
369 |
|
840 |
pulse--; |
370 |
|
840 |
fparam->sf[subframe_idx].pulse_pos[i] = pulse_idx; |
371 |
|
|
} |
372 |
|
|
} |
373 |
|
|
} else { |
374 |
|
|
p->pulse_dec_mode = 0; |
375 |
|
|
|
376 |
|
|
/* why do we need this? */ |
377 |
|
|
fparam->sf[subframe_idx].pulse_pos[6] = 0; |
378 |
|
|
|
379 |
|
|
for (i = 71; i >= 0; i--) { |
380 |
|
|
if (C72_binomials[index] <= combined_pulse_pos) { |
381 |
|
|
combined_pulse_pos -= C72_binomials[index]; |
382 |
|
|
|
383 |
|
|
fparam->sf[subframe_idx].pulse_pos[6 - index] = i; |
384 |
|
|
|
385 |
|
|
if (!index) |
386 |
|
|
break; |
387 |
|
|
--index; |
388 |
|
|
} |
389 |
|
|
--C72_binomials[0]; |
390 |
|
|
if (index) { |
391 |
|
|
int a; |
392 |
|
|
for (a = 0; a < index; a++) |
393 |
|
|
C72_binomials[a + 1] -= C72_binomials[a]; |
394 |
|
|
} |
395 |
|
|
} |
396 |
|
|
} |
397 |
|
|
} |
398 |
|
|
|
399 |
|
30 |
combined_pitch = get_bits(&gb, 24); |
400 |
|
|
|
401 |
|
30 |
fparam->pitch_lag[0] = (combined_pitch % 151) + 36; |
402 |
|
|
|
403 |
|
30 |
combined_pitch /= 151; |
404 |
|
|
|
405 |
✓✓ |
90 |
for (i = 1; i < SUBFRAMES - 1; i++) { |
406 |
|
60 |
fparam->pitch_lag[i] = combined_pitch % 48; |
407 |
|
60 |
combined_pitch /= 48; |
408 |
|
|
} |
409 |
✗✓ |
30 |
if (combined_pitch > 47) { |
410 |
|
|
av_log (p->avctx, AV_LOG_WARNING, "combined_pitch was too large\n"); |
411 |
|
|
combined_pitch = 0; |
412 |
|
|
} |
413 |
|
30 |
fparam->pitch_lag[i] = combined_pitch; |
414 |
|
|
|
415 |
|
30 |
pitch_lag = fparam->pitch_lag[0]; |
416 |
✓✓ |
120 |
for (i = 1; i < SUBFRAMES; i++) { |
417 |
✓✓ |
90 |
if (pitch_lag > 162) { |
418 |
|
11 |
fparam->pitch_lag[i] += 162 - 23; |
419 |
|
|
} else { |
420 |
|
79 |
tmp = pitch_lag - 23; |
421 |
✓✓ |
79 |
if (tmp < 36) |
422 |
|
17 |
tmp = 36; |
423 |
|
79 |
fparam->pitch_lag[i] += tmp; |
424 |
|
|
} |
425 |
|
90 |
pitch_lag = fparam->pitch_lag[i]; |
426 |
|
|
} |
427 |
|
30 |
} |
428 |
|
|
|
429 |
|
30 |
static void dss_sp_unpack_filter(DssSpContext *p) |
430 |
|
|
{ |
431 |
|
|
int i; |
432 |
|
|
|
433 |
✓✓ |
450 |
for (i = 0; i < 14; i++) |
434 |
|
420 |
p->lpc_filter[i] = dss_sp_filter_cb[i][p->fparam.filter_idx[i]]; |
435 |
|
30 |
} |
436 |
|
|
|
437 |
|
30 |
static void dss_sp_convert_coeffs(int32_t *lpc_filter, int32_t *coeffs) |
438 |
|
|
{ |
439 |
|
|
int a, a_plus, i; |
440 |
|
|
|
441 |
|
30 |
coeffs[0] = 0x2000; |
442 |
✓✓ |
450 |
for (a = 0; a < 14; a++) { |
443 |
|
420 |
a_plus = a + 1; |
444 |
|
420 |
coeffs[a_plus] = lpc_filter[a] >> 2; |
445 |
✓✓ |
420 |
if (a_plus / 2 >= 1) { |
446 |
✓✓ |
1860 |
for (i = 1; i <= a_plus / 2; i++) { |
447 |
|
|
int coeff_1, coeff_2, tmp; |
448 |
|
|
|
449 |
|
1470 |
coeff_1 = coeffs[i]; |
450 |
|
1470 |
coeff_2 = coeffs[a_plus - i]; |
451 |
|
|
|
452 |
|
1470 |
tmp = DSS_SP_FORMULA(coeff_1, lpc_filter[a], coeff_2); |
453 |
|
1470 |
coeffs[i] = av_clip_int16(tmp); |
454 |
|
|
|
455 |
|
1470 |
tmp = DSS_SP_FORMULA(coeff_2, lpc_filter[a], coeff_1); |
456 |
|
1470 |
coeffs[a_plus - i] = av_clip_int16(tmp); |
457 |
|
|
} |
458 |
|
|
} |
459 |
|
|
} |
460 |
|
30 |
} |
461 |
|
|
|
462 |
|
120 |
static void dss_sp_add_pulses(int32_t *vector_buf, |
463 |
|
|
const struct DssSpSubframe *sf) |
464 |
|
|
{ |
465 |
|
|
int i; |
466 |
|
|
|
467 |
✓✓ |
960 |
for (i = 0; i < 7; i++) |
468 |
|
840 |
vector_buf[sf->pulse_pos[i]] += (dss_sp_fixed_cb_gain[sf->gain] * |
469 |
|
840 |
dss_sp_pulse_val[sf->pulse_val[i]] + |
470 |
|
840 |
0x4000) >> 15; |
471 |
|
120 |
} |
472 |
|
|
|
473 |
|
120 |
static void dss_sp_gen_exc(int32_t *vector, int32_t *prev_exc, |
474 |
|
|
int pitch_lag, int gain) |
475 |
|
|
{ |
476 |
|
|
int i; |
477 |
|
|
|
478 |
|
|
/* do we actually need this check? we can use just [a3 - i % a3] |
479 |
|
|
* for both cases */ |
480 |
✓✓ |
120 |
if (pitch_lag < 72) |
481 |
✓✓ |
2336 |
for (i = 0; i < 72; i++) |
482 |
|
2304 |
vector[i] = prev_exc[pitch_lag - i % pitch_lag]; |
483 |
|
|
else |
484 |
✓✓ |
6424 |
for (i = 0; i < 72; i++) |
485 |
|
6336 |
vector[i] = prev_exc[pitch_lag - i]; |
486 |
|
|
|
487 |
✓✓ |
8760 |
for (i = 0; i < 72; i++) { |
488 |
|
8640 |
int tmp = gain * vector[i] >> 11; |
489 |
|
8640 |
vector[i] = av_clip_int16(tmp); |
490 |
|
|
} |
491 |
|
120 |
} |
492 |
|
|
|
493 |
|
720 |
static void dss_sp_scale_vector(int32_t *vec, int bits, int size) |
494 |
|
|
{ |
495 |
|
|
int i; |
496 |
|
|
|
497 |
✓✓ |
720 |
if (bits < 0) |
498 |
✓✓ |
12600 |
for (i = 0; i < size; i++) |
499 |
|
12240 |
vec[i] = vec[i] >> -bits; |
500 |
|
|
else |
501 |
✓✓ |
12600 |
for (i = 0; i < size; i++) |
502 |
|
12240 |
vec[i] = vec[i] * (1 << bits); |
503 |
|
720 |
} |
504 |
|
|
|
505 |
|
120 |
static void dss_sp_update_buf(int32_t *hist, int32_t *vector) |
506 |
|
|
{ |
507 |
|
|
int i; |
508 |
|
|
|
509 |
✓✓ |
13800 |
for (i = 114; i > 0; i--) |
510 |
|
13680 |
vector[i + 72] = vector[i]; |
511 |
|
|
|
512 |
✓✓ |
8760 |
for (i = 0; i < 72; i++) |
513 |
|
8640 |
vector[72 - i] = hist[i]; |
514 |
|
120 |
} |
515 |
|
|
|
516 |
|
240 |
static void dss_sp_shift_sq_sub(const int32_t *filter_buf, |
517 |
|
|
int32_t *error_buf, int32_t *dst) |
518 |
|
|
{ |
519 |
|
|
int a; |
520 |
|
|
|
521 |
✓✓ |
17520 |
for (a = 0; a < 72; a++) { |
522 |
|
|
int i, tmp; |
523 |
|
|
|
524 |
|
17280 |
tmp = dst[a] * filter_buf[0]; |
525 |
|
|
|
526 |
✓✓ |
259200 |
for (i = 14; i > 0; i--) |
527 |
|
241920 |
tmp -= error_buf[i] * (unsigned)filter_buf[i]; |
528 |
|
|
|
529 |
✓✓ |
259200 |
for (i = 14; i > 0; i--) |
530 |
|
241920 |
error_buf[i] = error_buf[i - 1]; |
531 |
|
|
|
532 |
|
17280 |
tmp = (int)(tmp + 4096U) >> 13; |
533 |
|
|
|
534 |
|
17280 |
error_buf[1] = tmp; |
535 |
|
|
|
536 |
|
17280 |
dst[a] = av_clip_int16(tmp); |
537 |
|
|
} |
538 |
|
240 |
} |
539 |
|
|
|
540 |
|
120 |
static void dss_sp_shift_sq_add(const int32_t *filter_buf, int32_t *audio_buf, |
541 |
|
|
int32_t *dst) |
542 |
|
|
{ |
543 |
|
|
int a; |
544 |
|
|
|
545 |
✓✓ |
8760 |
for (a = 0; a < 72; a++) { |
546 |
|
8640 |
int i, tmp = 0; |
547 |
|
|
|
548 |
|
8640 |
audio_buf[0] = dst[a]; |
549 |
|
|
|
550 |
✓✓ |
138240 |
for (i = 14; i >= 0; i--) |
551 |
|
129600 |
tmp += audio_buf[i] * filter_buf[i]; |
552 |
|
|
|
553 |
✓✓ |
129600 |
for (i = 14; i > 0; i--) |
554 |
|
120960 |
audio_buf[i] = audio_buf[i - 1]; |
555 |
|
|
|
556 |
|
8640 |
tmp = (tmp + 4096) >> 13; |
557 |
|
|
|
558 |
|
8640 |
dst[a] = av_clip_int16(tmp); |
559 |
|
|
} |
560 |
|
120 |
} |
561 |
|
|
|
562 |
|
240 |
static void dss_sp_vec_mult(const int32_t *src, int32_t *dst, |
563 |
|
|
const int16_t *mult) |
564 |
|
|
{ |
565 |
|
|
int i; |
566 |
|
|
|
567 |
|
240 |
dst[0] = src[0]; |
568 |
|
|
|
569 |
✓✓ |
3600 |
for (i = 1; i < 15; i++) |
570 |
|
3360 |
dst[i] = (src[i] * mult[i] + 0x4000) >> 15; |
571 |
|
240 |
} |
572 |
|
|
|
573 |
|
120 |
static int dss_sp_get_normalize_bits(int32_t *vector_buf, int16_t size) |
574 |
|
|
{ |
575 |
|
|
unsigned int val; |
576 |
|
|
int max_val; |
577 |
|
|
int i; |
578 |
|
|
|
579 |
|
120 |
val = 1; |
580 |
✓✓ |
8760 |
for (i = 0; i < size; i++) |
581 |
|
8640 |
val |= FFABS(vector_buf[i]); |
582 |
|
|
|
583 |
✓✓ |
999 |
for (max_val = 0; val <= 0x4000; ++max_val) |
584 |
|
879 |
val *= 2; |
585 |
|
120 |
return max_val; |
586 |
|
|
} |
587 |
|
|
|
588 |
|
240 |
static int dss_sp_vector_sum(DssSpContext *p, int size) |
589 |
|
|
{ |
590 |
|
240 |
int i, sum = 0; |
591 |
✓✓ |
17520 |
for (i = 0; i < size; i++) |
592 |
|
17280 |
sum += FFABS(p->vector_buf[i]); |
593 |
|
240 |
return sum; |
594 |
|
|
} |
595 |
|
|
|
596 |
|
120 |
static void dss_sp_sf_synthesis(DssSpContext *p, int32_t lpc_filter, |
597 |
|
|
int32_t *dst, int size) |
598 |
|
|
{ |
599 |
|
|
int32_t tmp_buf[15]; |
600 |
|
|
int32_t noise[72]; |
601 |
|
120 |
int bias, vsum_2 = 0, vsum_1 = 0, v36, normalize_bits; |
602 |
|
|
int i, tmp; |
603 |
|
|
|
604 |
✓✗ |
120 |
if (size > 0) { |
605 |
|
120 |
vsum_1 = dss_sp_vector_sum(p, size); |
606 |
|
|
|
607 |
✗✓ |
120 |
if (vsum_1 > 0xFFFFF) |
608 |
|
|
vsum_1 = 0xFFFFF; |
609 |
|
|
} |
610 |
|
|
|
611 |
|
120 |
normalize_bits = dss_sp_get_normalize_bits(p->vector_buf, size); |
612 |
|
|
|
613 |
|
120 |
dss_sp_scale_vector(p->vector_buf, normalize_bits - 3, size); |
614 |
|
120 |
dss_sp_scale_vector(p->audio_buf, normalize_bits, 15); |
615 |
|
120 |
dss_sp_scale_vector(p->err_buf1, normalize_bits, 15); |
616 |
|
|
|
617 |
|
120 |
v36 = p->err_buf1[1]; |
618 |
|
|
|
619 |
|
120 |
dss_sp_vec_mult(p->filter, tmp_buf, binary_decreasing_array); |
620 |
|
120 |
dss_sp_shift_sq_add(tmp_buf, p->audio_buf, p->vector_buf); |
621 |
|
|
|
622 |
|
120 |
dss_sp_vec_mult(p->filter, tmp_buf, dss_sp_unc_decreasing_array); |
623 |
|
120 |
dss_sp_shift_sq_sub(tmp_buf, p->err_buf1, p->vector_buf); |
624 |
|
|
|
625 |
|
|
/* lpc_filter can be negative */ |
626 |
|
120 |
lpc_filter = lpc_filter >> 1; |
627 |
✗✓ |
120 |
if (lpc_filter >= 0) |
628 |
|
|
lpc_filter = 0; |
629 |
|
|
|
630 |
✓✗ |
120 |
if (size > 1) { |
631 |
✓✓ |
8640 |
for (i = size - 1; i > 0; i--) { |
632 |
|
8520 |
tmp = DSS_SP_FORMULA(p->vector_buf[i], lpc_filter, |
633 |
|
|
p->vector_buf[i - 1]); |
634 |
|
8520 |
p->vector_buf[i] = av_clip_int16(tmp); |
635 |
|
|
} |
636 |
|
|
} |
637 |
|
|
|
638 |
|
120 |
tmp = DSS_SP_FORMULA(p->vector_buf[0], lpc_filter, v36); |
639 |
|
120 |
p->vector_buf[0] = av_clip_int16(tmp); |
640 |
|
|
|
641 |
|
120 |
dss_sp_scale_vector(p->vector_buf, -normalize_bits, size); |
642 |
|
120 |
dss_sp_scale_vector(p->audio_buf, -normalize_bits, 15); |
643 |
|
120 |
dss_sp_scale_vector(p->err_buf1, -normalize_bits, 15); |
644 |
|
|
|
645 |
✓✗ |
120 |
if (size > 0) |
646 |
|
120 |
vsum_2 = dss_sp_vector_sum(p, size); |
647 |
|
|
|
648 |
✓✗ |
120 |
if (vsum_2 >= 0x40) |
649 |
|
120 |
tmp = (vsum_1 << 11) / vsum_2; |
650 |
|
|
else |
651 |
|
|
tmp = 1; |
652 |
|
|
|
653 |
|
120 |
bias = 409 * tmp >> 15 << 15; |
654 |
|
120 |
tmp = (bias + 32358 * p->noise_state) >> 15; |
655 |
|
120 |
noise[0] = av_clip_int16(tmp); |
656 |
|
|
|
657 |
✓✓ |
8640 |
for (i = 1; i < size; i++) { |
658 |
|
8520 |
tmp = (bias + 32358 * noise[i - 1]) >> 15; |
659 |
|
8520 |
noise[i] = av_clip_int16(tmp); |
660 |
|
|
} |
661 |
|
|
|
662 |
|
120 |
p->noise_state = noise[size - 1]; |
663 |
✓✓ |
8760 |
for (i = 0; i < size; i++) { |
664 |
|
8640 |
tmp = (p->vector_buf[i] * noise[i]) >> 11; |
665 |
|
8640 |
dst[i] = av_clip_int16(tmp); |
666 |
|
|
} |
667 |
|
120 |
} |
668 |
|
|
|
669 |
|
30 |
static void dss_sp_update_state(DssSpContext *p, int32_t *dst) |
670 |
|
|
{ |
671 |
|
30 |
int i, offset = 6, counter = 0, a = 0; |
672 |
|
|
|
673 |
✓✓ |
210 |
for (i = 0; i < 6; i++) |
674 |
|
180 |
p->excitation[i] = p->excitation[288 + i]; |
675 |
|
|
|
676 |
✓✓ |
8670 |
for (i = 0; i < 72 * SUBFRAMES; i++) |
677 |
|
8640 |
p->excitation[6 + i] = dst[i]; |
678 |
|
|
|
679 |
|
|
do { |
680 |
|
7920 |
int tmp = 0; |
681 |
|
|
|
682 |
✓✓ |
55440 |
for (i = 0; i < 6; i++) |
683 |
|
47520 |
tmp += p->excitation[offset--] * dss_sp_sinc[a + i * 11]; |
684 |
|
|
|
685 |
|
7920 |
offset += 7; |
686 |
|
|
|
687 |
|
7920 |
tmp >>= 15; |
688 |
|
7920 |
dst[counter] = av_clip_int16(tmp); |
689 |
|
|
|
690 |
|
7920 |
counter++; |
691 |
|
|
|
692 |
|
7920 |
a = (a + 1) % 11; |
693 |
✓✓ |
7920 |
if (!a) |
694 |
|
720 |
offset++; |
695 |
✓✓ |
7920 |
} while (offset < FF_ARRAY_ELEMS(p->excitation)); |
696 |
|
30 |
} |
697 |
|
|
|
698 |
|
30 |
static void dss_sp_32to16bit(int16_t *dst, int32_t *src, int size) |
699 |
|
|
{ |
700 |
|
|
int i; |
701 |
|
|
|
702 |
✓✓ |
7950 |
for (i = 0; i < size; i++) |
703 |
|
7920 |
dst[i] = av_clip_int16(src[i]); |
704 |
|
30 |
} |
705 |
|
|
|
706 |
|
30 |
static int dss_sp_decode_one_frame(DssSpContext *p, |
707 |
|
|
int16_t *abuf_dst, const uint8_t *abuf_src) |
708 |
|
|
{ |
709 |
|
|
int i, j; |
710 |
|
|
|
711 |
|
30 |
dss_sp_unpack_coeffs(p, abuf_src); |
712 |
|
|
|
713 |
|
30 |
dss_sp_unpack_filter(p); |
714 |
|
|
|
715 |
|
30 |
dss_sp_convert_coeffs(p->lpc_filter, p->filter); |
716 |
|
|
|
717 |
✓✓ |
150 |
for (j = 0; j < SUBFRAMES; j++) { |
718 |
|
120 |
dss_sp_gen_exc(p->vector_buf, p->history, |
719 |
|
120 |
p->fparam.pitch_lag[j], |
720 |
|
120 |
dss_sp_adaptive_gain[p->fparam.sf_adaptive_gain[j]]); |
721 |
|
|
|
722 |
|
120 |
dss_sp_add_pulses(p->vector_buf, &p->fparam.sf[j]); |
723 |
|
|
|
724 |
|
120 |
dss_sp_update_buf(p->vector_buf, p->history); |
725 |
|
|
|
726 |
✓✓ |
8760 |
for (i = 0; i < 72; i++) |
727 |
|
8640 |
p->vector_buf[i] = p->history[72 - i]; |
728 |
|
|
|
729 |
|
120 |
dss_sp_shift_sq_sub(p->filter, |
730 |
|
120 |
p->err_buf2, p->vector_buf); |
731 |
|
|
|
732 |
|
120 |
dss_sp_sf_synthesis(p, p->lpc_filter[0], |
733 |
|
|
&p->working_buffer[j][0], 72); |
734 |
|
|
} |
735 |
|
|
|
736 |
|
30 |
dss_sp_update_state(p, &p->working_buffer[0][0]); |
737 |
|
|
|
738 |
|
30 |
dss_sp_32to16bit(abuf_dst, |
739 |
|
|
&p->working_buffer[0][0], 264); |
740 |
|
30 |
return 0; |
741 |
|
|
} |
742 |
|
|
|
743 |
|
30 |
static int dss_sp_decode_frame(AVCodecContext *avctx, void *data, |
744 |
|
|
int *got_frame_ptr, AVPacket *avpkt) |
745 |
|
|
{ |
746 |
|
30 |
DssSpContext *p = avctx->priv_data; |
747 |
|
30 |
AVFrame *frame = data; |
748 |
|
30 |
const uint8_t *buf = avpkt->data; |
749 |
|
30 |
int buf_size = avpkt->size; |
750 |
|
|
|
751 |
|
|
int16_t *out; |
752 |
|
|
int ret; |
753 |
|
|
|
754 |
✗✓ |
30 |
if (buf_size < DSS_SP_FRAME_SIZE) { |
755 |
|
|
if (buf_size) |
756 |
|
|
av_log(avctx, AV_LOG_WARNING, |
757 |
|
|
"Expected %d bytes, got %d - skipping packet.\n", |
758 |
|
|
DSS_SP_FRAME_SIZE, buf_size); |
759 |
|
|
*got_frame_ptr = 0; |
760 |
|
|
return AVERROR_INVALIDDATA; |
761 |
|
|
} |
762 |
|
|
|
763 |
|
30 |
frame->nb_samples = DSS_SP_SAMPLE_COUNT; |
764 |
✗✓ |
30 |
if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) |
765 |
|
|
return ret; |
766 |
|
|
|
767 |
|
30 |
out = (int16_t *)frame->data[0]; |
768 |
|
|
|
769 |
|
30 |
dss_sp_decode_one_frame(p, out, buf); |
770 |
|
|
|
771 |
|
30 |
*got_frame_ptr = 1; |
772 |
|
|
|
773 |
|
30 |
return DSS_SP_FRAME_SIZE; |
774 |
|
|
} |
775 |
|
|
|
776 |
|
|
AVCodec ff_dss_sp_decoder = { |
777 |
|
|
.name = "dss_sp", |
778 |
|
|
.long_name = NULL_IF_CONFIG_SMALL("Digital Speech Standard - Standard Play mode (DSS SP)"), |
779 |
|
|
.type = AVMEDIA_TYPE_AUDIO, |
780 |
|
|
.id = AV_CODEC_ID_DSS_SP, |
781 |
|
|
.priv_data_size = sizeof(DssSpContext), |
782 |
|
|
.init = dss_sp_decode_init, |
783 |
|
|
.decode = dss_sp_decode_frame, |
784 |
|
|
.capabilities = AV_CODEC_CAP_DR1, |
785 |
|
|
}; |