| /* |
| * DCA encoder tables |
| * Copyright (C) 2008-2012 Alexander E. Patrakov |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #ifndef AVCODEC_DCAENC_H |
| #define AVCODEC_DCAENC_H |
| |
| #include <stdint.h> |
| |
| #include "dcamath.h" |
| |
| typedef struct { |
| int32_t m; |
| int32_t e; |
| } softfloat; |
| |
| static const int sample_rates[] = { |
| 8000, 16000, 32000, 11025, 22050, 44100, 12000, 24000, 48000, 0, |
| }; |
| |
| static const uint8_t bitstream_sfreq[] = { 1, 2, 3, 6, 7, 8, 11, 12, 13 }; |
| |
| /* Auditory filter center frequencies and bandwidths, in Hz. |
| * The last two are made up, because there is no scientific data. |
| */ |
| static const uint16_t fc[] = { |
| 50, 150, 250, 350, 450, 570, 700, 840, 1000, 1170, 1370, 1600, 1850, 2150, |
| 2500, 2900, 3400, 4000, 4800, 5800, 7000, 8500, 10500, 13500, 17000 |
| }; |
| |
| static const uint16_t erb[] = { |
| 80, 100, 100, 100, 110, 120, 140, 150, 160, 190, 210, 240, 280, |
| 320, 380, 450, 550, 700, 900, 1100, 1300, 1800, 2500, 3500, 4500 |
| }; |
| |
| static const softfloat stepsize_inv[27] = { |
| {0, 0}, {1342177360, 21}, {2147483647, 21}, {1342177360, 20}, |
| {1819901661, 20}, {2147483647, 20}, {1278263843, 19}, {1579032492, 19}, |
| {1412817763, 18}, {1220162327, 17}, {1118482133, 16}, {1917391412, 16}, |
| {1766017772, 15}, {1525212826, 14}, {1290553940, 13}, {2097179000, 13}, |
| {1677683200, 12}, {1497972244, 11}, {1310893147, 10}, {1165354136, 9}, |
| {1748031204, 9}, {1542092044, 8}, {1636178017, 7}, {1636178017, 6}, |
| {1636178017, 5}, {1636178017, 4}, {1636178017, 3}, |
| }; |
| |
| static const softfloat scalefactor_inv[128] = { |
| {2147483647, 1}, {2147483647, 1}, {2147483647, 2}, {2147483647, 2}, |
| {2147483647, 2}, {2147483647, 2}, {1431655765, 2}, {1431655765, 2}, |
| {1431655765, 2}, {2147483647, 3}, {2147483647, 3}, {1717986918, 3}, |
| {1431655765, 3}, {1227133513, 3}, {1227133513, 3}, {2147483647, 4}, |
| {1717986918, 4}, {1561806289, 4}, {1431655765, 4}, {1227133513, 4}, |
| {2147483647, 5}, {1908874353, 5}, {1717986918, 5}, {1493901668, 5}, |
| {1321528398, 5}, {1145324612, 5}, {2021161080, 6}, {1808407282, 6}, |
| {1561806289, 6}, {1374389534, 6}, {1227133513, 6}, {2147483647, 7}, |
| {1908874353, 7}, {1676084798, 7}, {1477838209, 7}, {1296593900, 7}, |
| {1145324612, 7}, {2021161080, 8}, {1773405851, 8}, {1561806289, 8}, |
| {1374389534, 8}, {1216273924, 8}, {2139127680, 9}, {1882725390, 9}, |
| {1660893697, 9}, {1462116526, 9}, {1287484341, 9}, {1135859119, 9}, |
| {1999112050, 10}, {1762037865, 10}, {1552982525, 10}, {1367551775, 10}, |
| {1205604855, 10}, {2124660150, 11}, {1871509153, 11}, {1648443220, 11}, |
| {1452459217, 11}, {1279990253, 11}, {1127704233, 11}, {1987368509, 12}, |
| {1750814693, 12}, {1542632939, 12}, {1359099663, 12}, {1197398995, 12}, |
| {2109880792, 13}, {1858853132, 13}, {1638006149, 13}, {1443165385, 13}, |
| {1271479187, 13}, {1120235993, 13}, {1973767086, 14}, {1739045674, 14}, |
| {1532153461, 14}, {1349922194, 14}, {1189384493, 14}, {2095804865, 15}, |
| {1846464029, 15}, {1626872524, 15}, {1433347133, 15}, {1262853884, 15}, |
| {1112619678, 15}, {1960569045, 16}, {1727349015, 16}, {1521881227, 16}, |
| {1340842289, 16}, {1181357555, 16}, {2081669156, 17}, {1834047752, 17}, |
| {1615889229, 17}, {1423675973, 17}, {1254322457, 17}, {1105123583, 17}, |
| {1947330755, 18}, {1715693602, 18}, {1511607799, 18}, {1331801790, 18}, |
| {1173384427, 18}, {2067616532, 19}, {1821667648, 19}, {1604980024, 19}, |
| {1414066955, 19}, {1245861410, 19}, {1097665748, 19}, {1934193616, 20}, |
| {1704119624, 20}, {1501412075, 20}, {1322817107, 20}, {1165466323, 20}, |
| {2053666205, 21}, {1809379407, 21}, {1594151671, 21}, {1404526328, 21}, |
| {1237455941, 21}, {1090259329, 21}, {1921143210, 22}, {1692621231, 22}, |
| {1491281857, 22}, {1313892269, 22}, {1157603482, 22}, {2039810470, 23}, |
| {1797172644, 23}, {1583396912, 23}, {1395050052, 23}, {1229107276, 23}, |
| {1082903494, 23}, {1082903494, 23}, {1082903494, 23}, {1082903494, 23}, |
| }; |
| |
| /* manually derived from |
| * Table B.5: Selection of quantization levels and codebooks |
| */ |
| static const int bit_consumption[27] = { |
| -8, 28, 40, 48, 52, 60, 68, 76, 80, 96, |
| 112, 128, 144, 160, 176, 192, 208, 224, 240, 256, |
| 272, 288, 304, 320, 336, 352, 368, |
| }; |
| |
| static const int8_t lfe_index[16] = { |
| 1, 2, 2, 2, 2, 3, 2, 3, 2, 3, 2, 3, 1, 3, 2, 3 |
| }; |
| |
| static const int8_t channel_reorder_lfe[16][9] = { |
| { 0, -1, -1, -1, -1, -1, -1, -1, -1 }, |
| { 0, 1, -1, -1, -1, -1, -1, -1, -1 }, |
| { 0, 1, -1, -1, -1, -1, -1, -1, -1 }, |
| { 0, 1, -1, -1, -1, -1, -1, -1, -1 }, |
| { 0, 1, -1, -1, -1, -1, -1, -1, -1 }, |
| { 2, 0, 1, -1, -1, -1, -1, -1, -1 }, |
| { 0, 1, 3, -1, -1, -1, -1, -1, -1 }, |
| { 2, 0, 1, 4, -1, -1, -1, -1, -1 }, |
| { 0, 1, 3, 4, -1, -1, -1, -1, -1 }, |
| { 2, 0, 1, 4, 5, -1, -1, -1, -1 }, |
| { 3, 4, 0, 1, 5, 6, -1, -1, -1 }, |
| { 2, 0, 1, 4, 5, 6, -1, -1, -1 }, |
| { 0, 6, 4, 5, 2, 3, -1, -1, -1 }, |
| { 4, 2, 5, 0, 1, 6, 7, -1, -1 }, |
| { 5, 6, 0, 1, 7, 3, 8, 4, -1 }, |
| { 4, 2, 5, 0, 1, 6, 8, 7, -1 }, |
| }; |
| |
| static const int8_t channel_reorder_nolfe[16][9] = { |
| { 0, -1, -1, -1, -1, -1, -1, -1, -1 }, |
| { 0, 1, -1, -1, -1, -1, -1, -1, -1 }, |
| { 0, 1, -1, -1, -1, -1, -1, -1, -1 }, |
| { 0, 1, -1, -1, -1, -1, -1, -1, -1 }, |
| { 0, 1, -1, -1, -1, -1, -1, -1, -1 }, |
| { 2, 0, 1, -1, -1, -1, -1, -1, -1 }, |
| { 0, 1, 2, -1, -1, -1, -1, -1, -1 }, |
| { 2, 0, 1, 3, -1, -1, -1, -1, -1 }, |
| { 0, 1, 2, 3, -1, -1, -1, -1, -1 }, |
| { 2, 0, 1, 3, 4, -1, -1, -1, -1 }, |
| { 2, 3, 0, 1, 4, 5, -1, -1, -1 }, |
| { 2, 0, 1, 3, 4, 5, -1, -1, -1 }, |
| { 0, 5, 3, 4, 1, 2, -1, -1, -1 }, |
| { 3, 2, 4, 0, 1, 5, 6, -1, -1 }, |
| { 4, 5, 0, 1, 6, 2, 7, 3, -1 }, |
| { 3, 2, 4, 0, 1, 5, 7, 6, -1 }, |
| }; |
| |
| static inline int32_t quantize_value(int32_t value, softfloat quant) |
| { |
| int32_t offset = 1 << (quant.e - 1); |
| |
| value = mul32(value, quant.m) + offset; |
| value = value >> quant.e; |
| return value; |
| } |
| |
| #endif /* AVCODEC_DCAENC_H */ |
