2014-11-15 06:51:02 -06:00
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/* $OpenBSD$ */
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/*
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* Copyright (c) 2008-2012 Alexandre Ratchov <alex@caoua.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <string.h>
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#include "dsp.h"
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#include "utils.h"
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int aparams_ctltovol[128] = {
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0,
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256, 266, 276, 287, 299, 310, 323, 335,
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348, 362, 376, 391, 406, 422, 439, 456,
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474, 493, 512, 532, 553, 575, 597, 621,
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645, 670, 697, 724, 753, 782, 813, 845,
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878, 912, 948, 985, 1024, 1064, 1106, 1149,
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1195, 1241, 1290, 1341, 1393, 1448, 1505, 1564,
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1625, 1689, 1756, 1825, 1896, 1971, 2048, 2128,
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2212, 2299, 2389, 2483, 2580, 2682, 2787, 2896,
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3010, 3128, 3251, 3379, 3511, 3649, 3792, 3941,
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4096, 4257, 4424, 4598, 4778, 4966, 5161, 5363,
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5574, 5793, 6020, 6256, 6502, 6757, 7023, 7298,
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7585, 7883, 8192, 8514, 8848, 9195, 9556, 9931,
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10321, 10726, 11148, 11585, 12040, 12513, 13004, 13515,
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14045, 14596, 15170, 15765, 16384, 17027, 17696, 18390,
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19112, 19863, 20643, 21453, 22295, 23170, 24080, 25025,
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26008, 27029, 28090, 29193, 30339, 31530, 32768
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};
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2015-01-05 11:02:41 -06:00
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short dec_ulawmap[256] = {
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2014-12-30 12:17:32 -06:00
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-32124, -31100, -30076, -29052, -28028, -27004, -25980, -24956,
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-23932, -22908, -21884, -20860, -19836, -18812, -17788, -16764,
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-15996, -15484, -14972, -14460, -13948, -13436, -12924, -12412,
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-11900, -11388, -10876, -10364, -9852, -9340, -8828, -8316,
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-7932, -7676, -7420, -7164, -6908, -6652, -6396, -6140,
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-5884, -5628, -5372, -5116, -4860, -4604, -4348, -4092,
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-3900, -3772, -3644, -3516, -3388, -3260, -3132, -3004,
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-2876, -2748, -2620, -2492, -2364, -2236, -2108, -1980,
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-1884, -1820, -1756, -1692, -1628, -1564, -1500, -1436,
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-1372, -1308, -1244, -1180, -1116, -1052, -988, -924,
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-876, -844, -812, -780, -748, -716, -684, -652,
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-620, -588, -556, -524, -492, -460, -428, -396,
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-372, -356, -340, -324, -308, -292, -276, -260,
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-244, -228, -212, -196, -180, -164, -148, -132,
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-120, -112, -104, -96, -88, -80, -72, -64,
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-56, -48, -40, -32, -24, -16, -8, 0,
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32124, 31100, 30076, 29052, 28028, 27004, 25980, 24956,
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23932, 22908, 21884, 20860, 19836, 18812, 17788, 16764,
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15996, 15484, 14972, 14460, 13948, 13436, 12924, 12412,
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11900, 11388, 10876, 10364, 9852, 9340, 8828, 8316,
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7932, 7676, 7420, 7164, 6908, 6652, 6396, 6140,
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5884, 5628, 5372, 5116, 4860, 4604, 4348, 4092,
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3900, 3772, 3644, 3516, 3388, 3260, 3132, 3004,
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2876, 2748, 2620, 2492, 2364, 2236, 2108, 1980,
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1884, 1820, 1756, 1692, 1628, 1564, 1500, 1436,
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1372, 1308, 1244, 1180, 1116, 1052, 988, 924,
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876, 844, 812, 780, 748, 716, 684, 652,
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620, 588, 556, 524, 492, 460, 428, 396,
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372, 356, 340, 324, 308, 292, 276, 260,
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244, 228, 212, 196, 180, 164, 148, 132,
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120, 112, 104, 96, 88, 80, 72, 64,
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56, 48, 40, 32, 24, 16, 8, 0
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};
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2015-01-05 11:02:41 -06:00
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short dec_alawmap[256] = {
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2014-12-30 12:17:32 -06:00
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-5504, -5248, -6016, -5760, -4480, -4224, -4992, -4736,
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-7552, -7296, -8064, -7808, -6528, -6272, -7040, -6784,
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-2752, -2624, -3008, -2880, -2240, -2112, -2496, -2368,
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-3776, -3648, -4032, -3904, -3264, -3136, -3520, -3392,
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-22016, -20992, -24064, -23040, -17920, -16896, -19968, -18944,
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-30208, -29184, -32256, -31232, -26112, -25088, -28160, -27136,
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-11008, -10496, -12032, -11520, -8960, -8448, -9984, -9472,
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-15104, -14592, -16128, -15616, -13056, -12544, -14080, -13568,
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-344, -328, -376, -360, -280, -264, -312, -296,
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-472, -456, -504, -488, -408, -392, -440, -424,
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-88, -72, -120, -104, -24, -8, -56, -40,
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-216, -200, -248, -232, -152, -136, -184, -168,
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-1376, -1312, -1504, -1440, -1120, -1056, -1248, -1184,
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-1888, -1824, -2016, -1952, -1632, -1568, -1760, -1696,
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-688, -656, -752, -720, -560, -528, -624, -592,
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-944, -912, -1008, -976, -816, -784, -880, -848,
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5504, 5248, 6016, 5760, 4480, 4224, 4992, 4736,
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7552, 7296, 8064, 7808, 6528, 6272, 7040, 6784,
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2752, 2624, 3008, 2880, 2240, 2112, 2496, 2368,
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3776, 3648, 4032, 3904, 3264, 3136, 3520, 3392,
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22016, 20992, 24064, 23040, 17920, 16896, 19968, 18944,
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30208, 29184, 32256, 31232, 26112, 25088, 28160, 27136,
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11008, 10496, 12032, 11520, 8960, 8448, 9984, 9472,
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15104, 14592, 16128, 15616, 13056, 12544, 14080, 13568,
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344, 328, 376, 360, 280, 264, 312, 296,
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472, 456, 504, 488, 408, 392, 440, 424,
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88, 72, 120, 104, 24, 8, 56, 40,
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216, 200, 248, 232, 152, 136, 184, 168,
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1376, 1312, 1504, 1440, 1120, 1056, 1248, 1184,
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1888, 1824, 2016, 1952, 1632, 1568, 1760, 1696,
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688, 656, 752, 720, 560, 528, 624, 592,
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944, 912, 1008, 976, 816, 784, 880, 848
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};
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2014-11-15 06:51:02 -06:00
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/*
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* Generate a string corresponding to the encoding in par,
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* return the length of the resulting string.
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*/
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int
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aparams_enctostr(struct aparams *par, char *ostr)
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{
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char *p = ostr;
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*p++ = par->sig ? 's' : 'u';
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if (par->bits > 9)
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*p++ = '0' + par->bits / 10;
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*p++ = '0' + par->bits % 10;
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if (par->bps > 1) {
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*p++ = par->le ? 'l' : 'b';
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*p++ = 'e';
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if (par->bps != APARAMS_BPS(par->bits) ||
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par->bits < par->bps * 8) {
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*p++ = par->bps + '0';
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if (par->bits < par->bps * 8) {
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*p++ = par->msb ? 'm' : 'l';
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*p++ = 's';
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*p++ = 'b';
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}
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}
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}
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*p++ = '\0';
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return p - ostr - 1;
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}
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/*
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* Parse an encoding string, examples: s8, u8, s16, s16le, s24be ...
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* set *istr to the char following the encoding. Return the number
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* of bytes consumed.
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*/
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int
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aparams_strtoenc(struct aparams *par, char *istr)
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{
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char *p = istr;
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int i, sig, bits, le, bps, msb;
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#define IS_SEP(c) \
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(((c) < 'a' || (c) > 'z') && \
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((c) < 'A' || (c) > 'Z') && \
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((c) < '0' || (c) > '9'))
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/*
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* get signedness
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*/
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if (*p == 's') {
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sig = 1;
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} else if (*p == 'u') {
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sig = 0;
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} else
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return 0;
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p++;
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/*
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* get number of bits per sample
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*/
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bits = 0;
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for (i = 0; i < 2; i++) {
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if (*p < '0' || *p > '9')
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break;
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bits = (bits * 10) + *p - '0';
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p++;
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}
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if (bits < BITS_MIN || bits > BITS_MAX)
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return 0;
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bps = APARAMS_BPS(bits);
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msb = 1;
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le = ADATA_LE;
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/*
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* get (optional) endianness
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*/
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if (p[0] == 'l' && p[1] == 'e') {
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le = 1;
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p += 2;
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} else if (p[0] == 'b' && p[1] == 'e') {
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le = 0;
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p += 2;
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} else if (IS_SEP(*p)) {
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goto done;
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} else
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return 0;
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/*
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* get (optional) number of bytes
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*/
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if (*p >= '0' && *p <= '9') {
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bps = *p - '0';
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if (bps < (bits + 7) / 8 ||
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bps > (BITS_MAX + 7) / 8)
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return 0;
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p++;
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/*
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* get (optional) alignment
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*/
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if (p[0] == 'm' && p[1] == 's' && p[2] == 'b') {
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msb = 1;
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p += 3;
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} else if (p[0] == 'l' && p[1] == 's' && p[2] == 'b') {
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msb = 0;
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p += 3;
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} else if (IS_SEP(*p)) {
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goto done;
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} else
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return 0;
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} else if (!IS_SEP(*p))
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return 0;
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done:
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par->msb = msb;
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par->sig = sig;
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par->bits = bits;
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par->bps = bps;
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par->le = le;
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return p - istr;
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}
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/*
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* Initialise parameters structure with the defaults natively supported
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* by the machine.
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*/
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void
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aparams_init(struct aparams *par)
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{
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par->bps = sizeof(adata_t);
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par->bits = ADATA_BITS;
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par->le = ADATA_LE;
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par->sig = 1;
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par->msb = 0;
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}
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/*
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* log the given format/channels/encoding
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*/
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void
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aparams_log(struct aparams *par)
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{
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char enc[ENCMAX];
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aparams_enctostr(par, enc);
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log_puts(enc);
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}
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/*
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* return true if encoding corresponds to what we store in adata_t
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*/
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int
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aparams_native(struct aparams *par)
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{
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return par->bps == sizeof(adata_t) && par->bits == ADATA_BITS &&
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(par->bps == 1 || par->le == ADATA_LE) &&
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(par->bits == par->bps * 8 || !par->msb);
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}
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/*
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* resample the given number of frames
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*/
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int
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resamp_do(struct resamp *p, adata_t *in, adata_t *out, int todo)
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{
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unsigned int nch;
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adata_t *idata;
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unsigned int oblksz;
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unsigned int ifr;
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int s, ds, diff;
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adata_t *odata;
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unsigned int iblksz;
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unsigned int ofr;
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unsigned int c;
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adata_t *ctxbuf, *ctx;
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unsigned int ctx_start;
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/*
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* Partially copy structures into local variables, to avoid
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* unnecessary indirections; this also allows the compiler to
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* order local variables more "cache-friendly".
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*/
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idata = in;
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odata = out;
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diff = p->diff;
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iblksz = p->iblksz;
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oblksz = p->oblksz;
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ctxbuf = p->ctx;
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ctx_start = p->ctx_start;
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nch = p->nch;
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ifr = todo;
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ofr = oblksz;
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/*
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* Start conversion.
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*/
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#ifdef DEBUG
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if (log_level >= 4) {
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log_puts("resamp: copying ");
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log_puti(todo);
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log_puts(" frames, diff = ");
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log_putu(diff);
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log_puts("\n");
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}
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#endif
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for (;;) {
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if (diff < 0) {
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if (ifr == 0)
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break;
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ctx_start ^= 1;
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ctx = ctxbuf + ctx_start;
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for (c = nch; c > 0; c--) {
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*ctx = *idata++;
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|
|
ctx += RESAMP_NCTX;
|
|
|
|
}
|
|
|
|
diff += oblksz;
|
|
|
|
ifr--;
|
|
|
|
} else if (diff > 0) {
|
|
|
|
if (ofr == 0)
|
|
|
|
break;
|
|
|
|
ctx = ctxbuf;
|
|
|
|
for (c = nch; c > 0; c--) {
|
|
|
|
s = ctx[ctx_start];
|
|
|
|
ds = ctx[ctx_start ^ 1] - s;
|
|
|
|
ctx += RESAMP_NCTX;
|
|
|
|
*odata++ = s + ADATA_MULDIV(ds, diff, oblksz);
|
|
|
|
}
|
|
|
|
diff -= iblksz;
|
|
|
|
ofr--;
|
|
|
|
} else {
|
|
|
|
if (ifr == 0 || ofr == 0)
|
|
|
|
break;
|
|
|
|
ctx = ctxbuf + ctx_start;
|
|
|
|
for (c = nch; c > 0; c--) {
|
|
|
|
*odata++ = *ctx;
|
|
|
|
ctx += RESAMP_NCTX;
|
|
|
|
}
|
|
|
|
ctx_start ^= 1;
|
|
|
|
ctx = ctxbuf + ctx_start;
|
|
|
|
for (c = nch; c > 0; c--) {
|
|
|
|
*ctx = *idata++;
|
|
|
|
ctx += RESAMP_NCTX;
|
|
|
|
}
|
|
|
|
diff -= iblksz;
|
|
|
|
diff += oblksz;
|
|
|
|
ifr--;
|
|
|
|
ofr--;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
p->diff = diff;
|
|
|
|
p->ctx_start = ctx_start;
|
|
|
|
return oblksz - ofr;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* initialize resampler with ibufsz/obufsz factor and "nch" channels
|
|
|
|
*/
|
|
|
|
void
|
|
|
|
resamp_init(struct resamp *p, unsigned int iblksz, unsigned int oblksz, int nch)
|
|
|
|
{
|
|
|
|
unsigned int i;
|
|
|
|
|
|
|
|
p->iblksz = iblksz;
|
|
|
|
p->oblksz = oblksz;
|
|
|
|
p->diff = 0;
|
|
|
|
p->idelta = 0;
|
|
|
|
p->odelta = 0;
|
|
|
|
p->nch = nch;
|
|
|
|
p->ctx_start = 0;
|
|
|
|
for (i = 0; i < NCHAN_MAX * RESAMP_NCTX; i++)
|
|
|
|
p->ctx[i] = 0;
|
|
|
|
#ifdef DEBUG
|
|
|
|
if (log_level >= 3) {
|
|
|
|
log_puts("resamp: ");
|
|
|
|
log_putu(iblksz);
|
|
|
|
log_puts("/");
|
|
|
|
log_putu(oblksz);
|
|
|
|
log_puts("\n");
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* encode "todo" frames from native to foreign encoding
|
|
|
|
*/
|
|
|
|
void
|
|
|
|
enc_do(struct conv *p, unsigned char *in, unsigned char *out, int todo)
|
|
|
|
{
|
|
|
|
unsigned int f;
|
|
|
|
adata_t *idata;
|
|
|
|
unsigned int s;
|
|
|
|
unsigned int oshift;
|
|
|
|
unsigned int obias;
|
|
|
|
unsigned int obps;
|
|
|
|
unsigned int i;
|
|
|
|
unsigned char *odata;
|
|
|
|
int obnext;
|
|
|
|
int osnext;
|
|
|
|
|
|
|
|
#ifdef DEBUG
|
|
|
|
if (log_level >= 4) {
|
|
|
|
log_puts("enc: copying ");
|
|
|
|
log_putu(todo);
|
|
|
|
log_puts(" frames\n");
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
/*
|
|
|
|
* Partially copy structures into local variables, to avoid
|
|
|
|
* unnecessary indirections; this also allows the compiler to
|
|
|
|
* order local variables more "cache-friendly".
|
|
|
|
*/
|
|
|
|
idata = (adata_t *)in;
|
|
|
|
odata = out;
|
|
|
|
oshift = p->shift;
|
|
|
|
obias = p->bias;
|
|
|
|
obps = p->bps;
|
|
|
|
obnext = p->bnext;
|
|
|
|
osnext = p->snext;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Start conversion.
|
|
|
|
*/
|
|
|
|
odata += p->bfirst;
|
|
|
|
for (f = todo * p->nch; f > 0; f--) {
|
|
|
|
/* convert adata to u32 */
|
|
|
|
s = (int)*idata++ + ADATA_UNIT;
|
|
|
|
s <<= 32 - ADATA_BITS;
|
|
|
|
/* convert u32 to uN */
|
|
|
|
s >>= oshift;
|
|
|
|
/* convert uN to sN */
|
|
|
|
s -= obias;
|
|
|
|
/* packetize sN */
|
|
|
|
for (i = obps; i > 0; i--) {
|
|
|
|
*odata = (unsigned char)s;
|
|
|
|
s >>= 8;
|
|
|
|
odata += obnext;
|
|
|
|
}
|
|
|
|
odata += osnext;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* store "todo" frames of silence in foreign encoding
|
|
|
|
*/
|
|
|
|
void
|
|
|
|
enc_sil_do(struct conv *p, unsigned char *out, int todo)
|
|
|
|
{
|
|
|
|
unsigned int f;
|
|
|
|
unsigned int s;
|
|
|
|
unsigned int oshift;
|
|
|
|
int obias;
|
|
|
|
unsigned int obps;
|
|
|
|
unsigned int i;
|
|
|
|
unsigned char *odata;
|
|
|
|
int obnext;
|
|
|
|
int osnext;
|
|
|
|
|
|
|
|
#ifdef DEBUG
|
|
|
|
if (log_level >= 4) {
|
|
|
|
log_puts("enc: silence ");
|
|
|
|
log_putu(todo);
|
|
|
|
log_puts(" frames\n");
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
/*
|
|
|
|
* Partially copy structures into local variables, to avoid
|
|
|
|
* unnecessary indirections; this also allows the compiler to
|
|
|
|
* order local variables more "cache-friendly".
|
|
|
|
*/
|
|
|
|
odata = out;
|
|
|
|
oshift = p->shift;
|
|
|
|
obias = p->bias;
|
|
|
|
obps = p->bps;
|
|
|
|
obnext = p->bnext;
|
|
|
|
osnext = p->snext;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Start conversion.
|
|
|
|
*/
|
|
|
|
odata += p->bfirst;
|
|
|
|
for (f = todo * p->nch; f > 0; f--) {
|
|
|
|
s = ((1U << 31) >> oshift) - obias;
|
|
|
|
for (i = obps; i > 0; i--) {
|
|
|
|
*odata = (unsigned char)s;
|
|
|
|
s >>= 8;
|
|
|
|
odata += obnext;
|
|
|
|
}
|
|
|
|
odata += osnext;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* initialize encoder from native to foreign encoding
|
|
|
|
*/
|
|
|
|
void
|
|
|
|
enc_init(struct conv *p, struct aparams *par, int nch)
|
|
|
|
{
|
|
|
|
p->nch = nch;
|
|
|
|
p->bps = par->bps;
|
|
|
|
if (par->msb) {
|
|
|
|
p->shift = 32 - par->bps * 8;
|
|
|
|
} else {
|
|
|
|
p->shift = 32 - par->bits;
|
|
|
|
}
|
|
|
|
if (par->sig) {
|
|
|
|
p->bias = (1U << 31) >> p->shift;
|
|
|
|
} else {
|
|
|
|
p->bias = 0;
|
|
|
|
}
|
|
|
|
if (!par->le) {
|
|
|
|
p->bfirst = par->bps - 1;
|
|
|
|
p->bnext = -1;
|
|
|
|
p->snext = 2 * par->bps;
|
|
|
|
} else {
|
|
|
|
p->bfirst = 0;
|
|
|
|
p->bnext = 1;
|
|
|
|
p->snext = 0;
|
|
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
|
|
if (log_level >= 3) {
|
|
|
|
log_puts("enc: ");
|
|
|
|
aparams_log(par);
|
|
|
|
log_puts(", ");
|
|
|
|
log_puti(p->nch);
|
|
|
|
log_puts(" channels\n");
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* decode "todo" frames from from foreign to native encoding
|
|
|
|
*/
|
|
|
|
void
|
|
|
|
dec_do(struct conv *p, unsigned char *in, unsigned char *out, int todo)
|
|
|
|
{
|
|
|
|
unsigned int f;
|
|
|
|
unsigned int ibps;
|
|
|
|
unsigned int i;
|
|
|
|
unsigned int s = 0xdeadbeef;
|
|
|
|
unsigned char *idata;
|
|
|
|
int ibnext;
|
|
|
|
int isnext;
|
|
|
|
unsigned int ibias;
|
|
|
|
unsigned int ishift;
|
|
|
|
adata_t *odata;
|
|
|
|
|
|
|
|
#ifdef DEBUG
|
|
|
|
if (log_level >= 4) {
|
|
|
|
log_puts("dec: copying ");
|
|
|
|
log_putu(todo);
|
|
|
|
log_puts(" frames\n");
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
/*
|
|
|
|
* Partially copy structures into local variables, to avoid
|
|
|
|
* unnecessary indirections; this also allows the compiler to
|
|
|
|
* order local variables more "cache-friendly".
|
|
|
|
*/
|
|
|
|
idata = in;
|
|
|
|
odata = (adata_t *)out;
|
|
|
|
ibps = p->bps;
|
|
|
|
ibnext = p->bnext;
|
|
|
|
ibias = p->bias;
|
|
|
|
ishift = p->shift;
|
|
|
|
isnext = p->snext;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Start conversion.
|
|
|
|
*/
|
|
|
|
idata += p->bfirst;
|
|
|
|
for (f = todo * p->nch; f > 0; f--) {
|
|
|
|
for (i = ibps; i > 0; i--) {
|
|
|
|
s <<= 8;
|
|
|
|
s |= *idata;
|
|
|
|
idata += ibnext;
|
|
|
|
}
|
|
|
|
idata += isnext;
|
|
|
|
s += ibias;
|
|
|
|
s <<= ishift;
|
|
|
|
s >>= 32 - ADATA_BITS;
|
|
|
|
*odata++ = s - ADATA_UNIT;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-12-30 12:17:32 -06:00
|
|
|
/*
|
|
|
|
* convert a 32-bit float to adata_t, clipping to -1:1, boundaries
|
|
|
|
* excluded
|
|
|
|
*/
|
|
|
|
static inline int
|
|
|
|
f32_to_adata(unsigned int x)
|
|
|
|
{
|
|
|
|
unsigned int s, e, m, y;
|
|
|
|
|
|
|
|
s = (x >> 31);
|
|
|
|
e = (x >> 23) & 0xff;
|
|
|
|
m = (x << 8) | 0x80000000;
|
|
|
|
if (e < 127 - 24)
|
|
|
|
y = 0;
|
|
|
|
else if (e > 127 - 1)
|
|
|
|
y = ADATA_UNIT - 1;
|
|
|
|
else
|
|
|
|
y = m >> (127 + (32 - ADATA_BITS) - e);
|
|
|
|
return (y ^ -s) + s;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* convert samples from little endian ieee 754 floats to adata_t
|
|
|
|
*/
|
|
|
|
void
|
|
|
|
dec_do_float(struct conv *p, unsigned char *in, unsigned char *out, int todo)
|
|
|
|
{
|
|
|
|
unsigned int f;
|
|
|
|
unsigned int i;
|
|
|
|
unsigned int s = 0xdeadbeef;
|
|
|
|
unsigned char *idata;
|
|
|
|
int ibnext;
|
|
|
|
int isnext;
|
|
|
|
adata_t *odata;
|
|
|
|
|
|
|
|
#ifdef DEBUG
|
|
|
|
if (log_level >= 4) {
|
|
|
|
log_puts("dec_float: copying ");
|
|
|
|
log_putu(todo);
|
|
|
|
log_puts(" frames\n");
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
/*
|
|
|
|
* Partially copy structures into local variables, to avoid
|
|
|
|
* unnecessary indirections; this also allows the compiler to
|
|
|
|
* order local variables more "cache-friendly".
|
|
|
|
*/
|
|
|
|
idata = in;
|
|
|
|
odata = (adata_t *)out;
|
|
|
|
ibnext = p->bnext;
|
|
|
|
isnext = p->snext;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Start conversion.
|
|
|
|
*/
|
|
|
|
idata += p->bfirst;
|
|
|
|
for (f = todo * p->nch; f > 0; f--) {
|
|
|
|
for (i = 4; i > 0; i--) {
|
|
|
|
s <<= 8;
|
|
|
|
s |= *idata;
|
|
|
|
idata += ibnext;
|
|
|
|
}
|
|
|
|
idata += isnext;
|
|
|
|
*odata++ = f32_to_adata(s);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
2014-12-30 12:36:15 -06:00
|
|
|
* convert samples from ulaw/alaw to adata_t
|
2014-12-30 12:17:32 -06:00
|
|
|
*/
|
|
|
|
void
|
2014-12-30 12:36:15 -06:00
|
|
|
dec_do_ulaw(struct conv *p, unsigned char *in, unsigned char *out, int todo, int is_alaw)
|
2014-12-30 12:17:32 -06:00
|
|
|
{
|
|
|
|
unsigned int f;
|
|
|
|
unsigned char *idata;
|
|
|
|
adata_t *odata;
|
2014-12-30 12:36:15 -06:00
|
|
|
short *map;
|
2014-12-30 12:17:32 -06:00
|
|
|
|
|
|
|
#ifdef DEBUG
|
|
|
|
if (log_level >= 4) {
|
|
|
|
log_puts("dec_ulaw: copying ");
|
|
|
|
log_putu(todo);
|
|
|
|
log_puts(" frames\n");
|
|
|
|
}
|
|
|
|
#endif
|
2015-01-05 11:02:41 -06:00
|
|
|
map = is_alaw ? dec_alawmap : dec_ulawmap;
|
2014-12-30 12:17:32 -06:00
|
|
|
idata = in;
|
|
|
|
odata = (adata_t *)out;
|
|
|
|
for (f = todo * p->nch; f > 0; f--)
|
2014-12-30 12:36:15 -06:00
|
|
|
*odata++ = map[*idata++] << (ADATA_BITS - 16);
|
2014-12-30 12:17:32 -06:00
|
|
|
}
|
|
|
|
|
2014-11-15 06:51:02 -06:00
|
|
|
/*
|
|
|
|
* initialize decoder from foreign to native encoding
|
|
|
|
*/
|
|
|
|
void
|
|
|
|
dec_init(struct conv *p, struct aparams *par, int nch)
|
|
|
|
{
|
|
|
|
p->bps = par->bps;
|
|
|
|
p->nch = nch;
|
|
|
|
if (par->msb) {
|
|
|
|
p->shift = 32 - par->bps * 8;
|
|
|
|
} else {
|
|
|
|
p->shift = 32 - par->bits;
|
|
|
|
}
|
|
|
|
if (par->sig) {
|
|
|
|
p->bias = (1U << 31) >> p->shift;
|
|
|
|
} else {
|
|
|
|
p->bias = 0;
|
|
|
|
}
|
|
|
|
if (par->le) {
|
|
|
|
p->bfirst = par->bps - 1;
|
|
|
|
p->bnext = -1;
|
|
|
|
p->snext = 2 * par->bps;
|
|
|
|
} else {
|
|
|
|
p->bfirst = 0;
|
|
|
|
p->bnext = 1;
|
|
|
|
p->snext = 0;
|
|
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
|
|
if (log_level >= 3) {
|
|
|
|
log_puts("dec: ");
|
|
|
|
aparams_log(par);
|
|
|
|
log_puts(", ");
|
|
|
|
log_puti(p->nch);
|
|
|
|
log_puts(" channels\n");
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* mix "todo" input frames on the output with the given volume
|
|
|
|
*/
|
|
|
|
void
|
|
|
|
cmap_add(struct cmap *p, void *in, void *out, int vol, int todo)
|
|
|
|
{
|
|
|
|
adata_t *idata, *odata;
|
|
|
|
int i, j, nch, istart, inext, onext, ostart, y, v;
|
|
|
|
|
|
|
|
#ifdef DEBUG
|
|
|
|
if (log_level >= 4) {
|
|
|
|
log_puts("cmap: adding ");
|
|
|
|
log_puti(todo);
|
|
|
|
log_puts(" frames\n");
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
idata = in;
|
|
|
|
odata = out;
|
|
|
|
ostart = p->ostart;
|
|
|
|
onext = p->onext;
|
|
|
|
istart = p->istart;
|
|
|
|
inext = p->inext;
|
|
|
|
nch = p->nch;
|
|
|
|
v = vol;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* map/mix input on the output
|
|
|
|
*/
|
|
|
|
for (i = todo; i > 0; i--) {
|
|
|
|
odata += ostart;
|
|
|
|
idata += istart;
|
|
|
|
for (j = nch; j > 0; j--) {
|
|
|
|
y = *odata + ADATA_MUL(*idata, v);
|
|
|
|
if (y >= ADATA_UNIT)
|
|
|
|
y = ADATA_UNIT - 1;
|
|
|
|
else if (y < -ADATA_UNIT)
|
|
|
|
y = -ADATA_UNIT;
|
|
|
|
*odata = y;
|
|
|
|
idata++;
|
|
|
|
odata++;
|
|
|
|
}
|
|
|
|
odata += onext;
|
|
|
|
idata += inext;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* overwrite output with "todo" input frames with with the given volume
|
|
|
|
*/
|
|
|
|
void
|
|
|
|
cmap_copy(struct cmap *p, void *in, void *out, int vol, int todo)
|
|
|
|
{
|
|
|
|
adata_t *idata, *odata;
|
|
|
|
int i, j, nch, istart, inext, onext, ostart, v;
|
|
|
|
|
|
|
|
#ifdef DEBUG
|
|
|
|
if (log_level >= 4) {
|
|
|
|
log_puts("cmap: copying ");
|
|
|
|
log_puti(todo);
|
|
|
|
log_puts(" frames\n");
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
idata = in;
|
|
|
|
odata = out;
|
|
|
|
ostart = p->ostart;
|
|
|
|
onext = p->onext;
|
|
|
|
istart = p->istart;
|
|
|
|
inext = p->inext;
|
|
|
|
nch = p->nch;
|
|
|
|
v = vol;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* copy to the output buffer
|
|
|
|
*/
|
|
|
|
for (i = todo; i > 0; i--) {
|
|
|
|
idata += istart;
|
|
|
|
odata += ostart;
|
|
|
|
for (j = nch; j > 0; j--) {
|
|
|
|
*odata = ADATA_MUL(*idata, v);
|
|
|
|
odata++;
|
|
|
|
idata++;
|
|
|
|
}
|
|
|
|
odata += onext;
|
|
|
|
idata += inext;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* initialize channel mapper, to map a subset of input channel range
|
|
|
|
* into a subset of the output channel range
|
|
|
|
*/
|
|
|
|
void
|
|
|
|
cmap_init(struct cmap *p,
|
|
|
|
int imin, int imax, int isubmin, int isubmax,
|
|
|
|
int omin, int omax, int osubmin, int osubmax)
|
|
|
|
{
|
|
|
|
int cmin, cmax;
|
|
|
|
|
|
|
|
cmin = -NCHAN_MAX;
|
|
|
|
if (osubmin > cmin)
|
|
|
|
cmin = osubmin;
|
|
|
|
if (omin > cmin)
|
|
|
|
cmin = omin;
|
|
|
|
if (isubmin > cmin)
|
|
|
|
cmin = isubmin;
|
|
|
|
if (imin > cmin)
|
|
|
|
cmin = imin;
|
|
|
|
|
|
|
|
cmax = NCHAN_MAX;
|
|
|
|
if (osubmax < cmax)
|
|
|
|
cmax = osubmax;
|
|
|
|
if (omax < cmax)
|
|
|
|
cmax = omax;
|
|
|
|
if (isubmax < cmax)
|
|
|
|
cmax = isubmax;
|
|
|
|
if (imax < cmax)
|
|
|
|
cmax = imax;
|
|
|
|
|
|
|
|
p->ostart = cmin - omin;
|
|
|
|
p->onext = omax - cmax;
|
|
|
|
p->istart = cmin - imin;
|
|
|
|
p->inext = imax - cmax;
|
|
|
|
p->nch = cmax - cmin + 1;
|
|
|
|
#ifdef DEBUG
|
|
|
|
if (log_level >= 3) {
|
|
|
|
log_puts("cmap: nch = ");
|
|
|
|
log_puti(p->nch);
|
|
|
|
log_puts(", ostart = ");
|
|
|
|
log_puti(p->ostart);
|
|
|
|
log_puts(", onext = ");
|
|
|
|
log_puti(p->onext);
|
|
|
|
log_puts(", istart = ");
|
|
|
|
log_puti(p->istart);
|
|
|
|
log_puts(", inext = ");
|
|
|
|
log_puti(p->inext);
|
|
|
|
log_puts("\n");
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
}
|