/src/ffmpeg/libavcodec/dcaenc.h
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1 | | /* |
2 | | * DCA encoder tables |
3 | | * Copyright (C) 2008-2012 Alexander E. Patrakov |
4 | | * |
5 | | * This file is part of FFmpeg. |
6 | | * |
7 | | * FFmpeg is free software; you can redistribute it and/or |
8 | | * modify it under the terms of the GNU Lesser General Public |
9 | | * License as published by the Free Software Foundation; either |
10 | | * version 2.1 of the License, or (at your option) any later version. |
11 | | * |
12 | | * FFmpeg is distributed in the hope that it will be useful, |
13 | | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
15 | | * Lesser General Public License for more details. |
16 | | * |
17 | | * You should have received a copy of the GNU Lesser General Public |
18 | | * License along with FFmpeg; if not, write to the Free Software |
19 | | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
20 | | */ |
21 | | |
22 | | #ifndef AVCODEC_DCAENC_H |
23 | | #define AVCODEC_DCAENC_H |
24 | | |
25 | | #include <stdint.h> |
26 | | |
27 | | #include "dcamath.h" |
28 | | |
29 | | typedef struct { |
30 | | int32_t m; |
31 | | int32_t e; |
32 | | } softfloat; |
33 | | |
34 | | static const int sample_rates[] = { |
35 | | 8000, 16000, 32000, 11025, 22050, 44100, 12000, 24000, 48000, 0, |
36 | | }; |
37 | | |
38 | | static const uint8_t bitstream_sfreq[] = { 1, 2, 3, 6, 7, 8, 11, 12, 13 }; |
39 | | |
40 | | /* Auditory filter center frequencies and bandwidths, in Hz. |
41 | | * The last two are made up, because there is no scientific data. |
42 | | */ |
43 | | static const uint16_t fc[] = { |
44 | | 50, 150, 250, 350, 450, 570, 700, 840, 1000, 1170, 1370, 1600, 1850, 2150, |
45 | | 2500, 2900, 3400, 4000, 4800, 5800, 7000, 8500, 10500, 13500, 17000 |
46 | | }; |
47 | | |
48 | | static const uint16_t erb[] = { |
49 | | 80, 100, 100, 100, 110, 120, 140, 150, 160, 190, 210, 240, 280, |
50 | | 320, 380, 450, 550, 700, 900, 1100, 1300, 1800, 2500, 3500, 4500 |
51 | | }; |
52 | | |
53 | | static const softfloat stepsize_inv[27] = { |
54 | | {0, 0}, {1342177360, 21}, {2147483647, 21}, {1342177360, 20}, |
55 | | {1819901661, 20}, {2147483647, 20}, {1278263843, 19}, {1579032492, 19}, |
56 | | {1412817763, 18}, {1220162327, 17}, {1118482133, 16}, {1917391412, 16}, |
57 | | {1766017772, 15}, {1525212826, 14}, {1290553940, 13}, {2097179000, 13}, |
58 | | {1677683200, 12}, {1497972244, 11}, {1310893147, 10}, {1165354136, 9}, |
59 | | {1748031204, 9}, {1542092044, 8}, {1636178017, 7}, {1636178017, 6}, |
60 | | {1636178017, 5}, {1636178017, 4}, {1636178017, 3}, |
61 | | }; |
62 | | |
63 | | static const softfloat scalefactor_inv[128] = { |
64 | | {2147483647, 1}, {2147483647, 1}, {2147483647, 2}, {2147483647, 2}, |
65 | | {2147483647, 2}, {2147483647, 2}, {1431655765, 2}, {1431655765, 2}, |
66 | | {1431655765, 2}, {2147483647, 3}, {2147483647, 3}, {1717986918, 3}, |
67 | | {1431655765, 3}, {1227133513, 3}, {1227133513, 3}, {2147483647, 4}, |
68 | | {1717986918, 4}, {1561806289, 4}, {1431655765, 4}, {1227133513, 4}, |
69 | | {2147483647, 5}, {1908874353, 5}, {1717986918, 5}, {1493901668, 5}, |
70 | | {1321528398, 5}, {1145324612, 5}, {2021161080, 6}, {1808407282, 6}, |
71 | | {1561806289, 6}, {1374389534, 6}, {1227133513, 6}, {2147483647, 7}, |
72 | | {1908874353, 7}, {1676084798, 7}, {1477838209, 7}, {1296593900, 7}, |
73 | | {1145324612, 7}, {2021161080, 8}, {1773405851, 8}, {1561806289, 8}, |
74 | | {1374389534, 8}, {1216273924, 8}, {2139127680, 9}, {1882725390, 9}, |
75 | | {1660893697, 9}, {1462116526, 9}, {1287484341, 9}, {1135859119, 9}, |
76 | | {1999112050, 10}, {1762037865, 10}, {1552982525, 10}, {1367551775, 10}, |
77 | | {1205604855, 10}, {2124660150, 11}, {1871509153, 11}, {1648443220, 11}, |
78 | | {1452459217, 11}, {1279990253, 11}, {1127704233, 11}, {1987368509, 12}, |
79 | | {1750814693, 12}, {1542632939, 12}, {1359099663, 12}, {1197398995, 12}, |
80 | | {2109880792, 13}, {1858853132, 13}, {1638006149, 13}, {1443165385, 13}, |
81 | | {1271479187, 13}, {1120235993, 13}, {1973767086, 14}, {1739045674, 14}, |
82 | | {1532153461, 14}, {1349922194, 14}, {1189384493, 14}, {2095804865, 15}, |
83 | | {1846464029, 15}, {1626872524, 15}, {1433347133, 15}, {1262853884, 15}, |
84 | | {1112619678, 15}, {1960569045, 16}, {1727349015, 16}, {1521881227, 16}, |
85 | | {1340842289, 16}, {1181357555, 16}, {2081669156, 17}, {1834047752, 17}, |
86 | | {1615889229, 17}, {1423675973, 17}, {1254322457, 17}, {1105123583, 17}, |
87 | | {1947330755, 18}, {1715693602, 18}, {1511607799, 18}, {1331801790, 18}, |
88 | | {1173384427, 18}, {2067616532, 19}, {1821667648, 19}, {1604980024, 19}, |
89 | | {1414066955, 19}, {1245861410, 19}, {1097665748, 19}, {1934193616, 20}, |
90 | | {1704119624, 20}, {1501412075, 20}, {1322817107, 20}, {1165466323, 20}, |
91 | | {2053666205, 21}, {1809379407, 21}, {1594151671, 21}, {1404526328, 21}, |
92 | | {1237455941, 21}, {1090259329, 21}, {1921143210, 22}, {1692621231, 22}, |
93 | | {1491281857, 22}, {1313892269, 22}, {1157603482, 22}, {2039810470, 23}, |
94 | | {1797172644, 23}, {1583396912, 23}, {1395050052, 23}, {1229107276, 23}, |
95 | | {1082903494, 23}, {1082903494, 23}, {1082903494, 23}, {1082903494, 23}, |
96 | | }; |
97 | | |
98 | | /* manually derived from |
99 | | * Table B.5: Selection of quantization levels and codebooks |
100 | | */ |
101 | | static const int bit_consumption[27] = { |
102 | | -8, 28, 40, 48, 52, 60, 68, 76, 80, 96, |
103 | | 112, 128, 144, 160, 176, 192, 208, 224, 240, 256, |
104 | | 272, 288, 304, 320, 336, 352, 368, |
105 | | }; |
106 | | |
107 | | static const int8_t lfe_index[16] = { |
108 | | 1, 2, 2, 2, 2, 3, 2, 3, 2, 3, 2, 3, 1, 3, 2, 3 |
109 | | }; |
110 | | |
111 | | static const int8_t channel_reorder_lfe[16][9] = { |
112 | | { 0, -1, -1, -1, -1, -1, -1, -1, -1 }, |
113 | | { 0, 1, -1, -1, -1, -1, -1, -1, -1 }, |
114 | | { 0, 1, -1, -1, -1, -1, -1, -1, -1 }, |
115 | | { 0, 1, -1, -1, -1, -1, -1, -1, -1 }, |
116 | | { 0, 1, -1, -1, -1, -1, -1, -1, -1 }, |
117 | | { 2, 0, 1, -1, -1, -1, -1, -1, -1 }, |
118 | | { 0, 1, 3, -1, -1, -1, -1, -1, -1 }, |
119 | | { 2, 0, 1, 4, -1, -1, -1, -1, -1 }, |
120 | | { 0, 1, 3, 4, -1, -1, -1, -1, -1 }, |
121 | | { 2, 0, 1, 4, 5, -1, -1, -1, -1 }, |
122 | | { 3, 4, 0, 1, 5, 6, -1, -1, -1 }, |
123 | | { 2, 0, 1, 4, 5, 6, -1, -1, -1 }, |
124 | | { 0, 6, 4, 5, 2, 3, -1, -1, -1 }, |
125 | | { 4, 2, 5, 0, 1, 6, 7, -1, -1 }, |
126 | | { 5, 6, 0, 1, 7, 3, 8, 4, -1 }, |
127 | | { 4, 2, 5, 0, 1, 6, 8, 7, -1 }, |
128 | | }; |
129 | | |
130 | | static const int8_t channel_reorder_nolfe[16][9] = { |
131 | | { 0, -1, -1, -1, -1, -1, -1, -1, -1 }, |
132 | | { 0, 1, -1, -1, -1, -1, -1, -1, -1 }, |
133 | | { 0, 1, -1, -1, -1, -1, -1, -1, -1 }, |
134 | | { 0, 1, -1, -1, -1, -1, -1, -1, -1 }, |
135 | | { 0, 1, -1, -1, -1, -1, -1, -1, -1 }, |
136 | | { 2, 0, 1, -1, -1, -1, -1, -1, -1 }, |
137 | | { 0, 1, 2, -1, -1, -1, -1, -1, -1 }, |
138 | | { 2, 0, 1, 3, -1, -1, -1, -1, -1 }, |
139 | | { 0, 1, 2, 3, -1, -1, -1, -1, -1 }, |
140 | | { 2, 0, 1, 3, 4, -1, -1, -1, -1 }, |
141 | | { 2, 3, 0, 1, 4, 5, -1, -1, -1 }, |
142 | | { 2, 0, 1, 3, 4, 5, -1, -1, -1 }, |
143 | | { 0, 5, 3, 4, 1, 2, -1, -1, -1 }, |
144 | | { 3, 2, 4, 0, 1, 5, 6, -1, -1 }, |
145 | | { 4, 5, 0, 1, 6, 2, 7, 3, -1 }, |
146 | | { 3, 2, 4, 0, 1, 5, 7, 6, -1 }, |
147 | | }; |
148 | | |
149 | | static inline int32_t quantize_value(int32_t value, softfloat quant) |
150 | 0 | { |
151 | 0 | int32_t offset = 1 << (quant.e - 1); |
152 | |
|
153 | 0 | value = mul32(value, quant.m) + offset; |
154 | 0 | value = value >> quant.e; |
155 | 0 | return value; |
156 | 0 | } Unexecuted instantiation: dcaenc.c:quantize_value Unexecuted instantiation: dcaadpcm.c:quantize_value Unexecuted instantiation: dca_core.c:quantize_value |
157 | | |
158 | | #endif /* AVCODEC_DCAENC_H */ |