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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 typedef struct {
30 } softfloat;
31 
32 static const int sample_rates[] = {
33  8000, 16000, 32000, 11025, 22050, 44100, 12000, 24000, 48000, 0,
34 };
35 
36 static const uint8_t bitstream_sfreq[] = { 1, 2, 3, 6, 7, 8, 11, 12, 13 };
37 
38 /* Auditory filter center frequencies and bandwidths, in Hz.
39  * The last two are made up, because there is no scientific data.
40  */
41 static const uint16_t fc[] = {
42  50, 150, 250, 350, 450, 570, 700, 840, 1000, 1170, 1370, 1600, 1850, 2150,
43  2500, 2900, 3400, 4000, 4800, 5800, 7000, 8500, 10500, 13500, 17000
44 };
45 
46 static const uint16_t erb[] = {
47  80, 100, 100, 100, 110, 120, 140, 150, 160, 190, 210, 240, 280,
48  320, 380, 450, 550, 700, 900, 1100, 1300, 1800, 2500, 3500, 4500
49 };
50 
51 static const softfloat stepsize_inv[27] = {
52  {0, 0}, {1342177360, 21}, {2147483647, 21}, {1342177360, 20},
53  {1819901661, 20}, {2147483647, 20}, {1278263843, 19}, {1579032492, 19},
54  {1412817763, 18}, {1220162327, 17}, {1118482133, 16}, {1917391412, 16},
55  {1766017772, 15}, {1525212826, 14}, {1290553940, 13}, {2097179000, 13},
56  {1677683200, 12}, {1497972244, 11}, {1310893147, 10}, {1165354136, 9},
57  {1748031204, 9}, {1542092044, 8}, {1636178017, 7}, {1636178017, 6},
58  {1636178017, 5}, {1636178017, 4}, {1636178017, 3},
59 };
60 
61 static const softfloat scalefactor_inv[128] = {
62  {2147483647, 1}, {2147483647, 1}, {2147483647, 2}, {2147483647, 2},
63  {2147483647, 2}, {2147483647, 2}, {1431655765, 2}, {1431655765, 2},
64  {1431655765, 2}, {2147483647, 3}, {2147483647, 3}, {1717986918, 3},
65  {1431655765, 3}, {1227133513, 3}, {1227133513, 3}, {2147483647, 4},
66  {1717986918, 4}, {1561806289, 4}, {1431655765, 4}, {1227133513, 4},
67  {2147483647, 5}, {1908874353, 5}, {1717986918, 5}, {1493901668, 5},
68  {1321528398, 5}, {1145324612, 5}, {2021161080, 6}, {1808407282, 6},
69  {1561806289, 6}, {1374389534, 6}, {1227133513, 6}, {2147483647, 7},
70  {1908874353, 7}, {1676084798, 7}, {1477838209, 7}, {1296593900, 7},
71  {1145324612, 7}, {2021161080, 8}, {1773405851, 8}, {1561806289, 8},
72  {1374389534, 8}, {1216273924, 8}, {2139127680, 9}, {1882725390, 9},
73  {1660893697, 9}, {1462116526, 9}, {1287484341, 9}, {1135859119, 9},
74  {1999112050, 10}, {1762037865, 10}, {1552982525, 10}, {1367551775, 10},
75  {1205604855, 10}, {2124660150, 11}, {1871509153, 11}, {1648443220, 11},
76  {1452459217, 11}, {1279990253, 11}, {1127704233, 11}, {1987368509, 12},
77  {1750814693, 12}, {1542632939, 12}, {1359099663, 12}, {1197398995, 12},
78  {2109880792, 13}, {1858853132, 13}, {1638006149, 13}, {1443165385, 13},
79  {1271479187, 13}, {1120235993, 13}, {1973767086, 14}, {1739045674, 14},
80  {1532153461, 14}, {1349922194, 14}, {1189384493, 14}, {2095804865, 15},
81  {1846464029, 15}, {1626872524, 15}, {1433347133, 15}, {1262853884, 15},
82  {1112619678, 15}, {1960569045, 16}, {1727349015, 16}, {1521881227, 16},
83  {1340842289, 16}, {1181357555, 16}, {2081669156, 17}, {1834047752, 17},
84  {1615889229, 17}, {1423675973, 17}, {1254322457, 17}, {1105123583, 17},
85  {1947330755, 18}, {1715693602, 18}, {1511607799, 18}, {1331801790, 18},
86  {1173384427, 18}, {2067616532, 19}, {1821667648, 19}, {1604980024, 19},
87  {1414066955, 19}, {1245861410, 19}, {1097665748, 19}, {1934193616, 20},
88  {1704119624, 20}, {1501412075, 20}, {1322817107, 20}, {1165466323, 20},
89  {2053666205, 21}, {1809379407, 21}, {1594151671, 21}, {1404526328, 21},
90  {1237455941, 21}, {1090259329, 21}, {1921143210, 22}, {1692621231, 22},
91  {1491281857, 22}, {1313892269, 22}, {1157603482, 22}, {2039810470, 23},
92  {1797172644, 23}, {1583396912, 23}, {1395050052, 23}, {1229107276, 23},
93  {1082903494, 23}, {1082903494, 23}, {1082903494, 23}, {1082903494, 23},
94 };
95 
96 /* manually derived from
97  * Table B.5: Selection of quantization levels and codebooks
98  */
99 static const int bit_consumption[27] = {
100  -8, 28, 40, 48, 52, 60, 68, 76, 80, 96,
101  112, 128, 144, 160, 176, 192, 208, 224, 240, 256,
102  272, 288, 304, 320, 336, 352, 368,
103 };
104 
105 static const int8_t lfe_index[16] = {
106  1, 2, 2, 2, 2, 3, 2, 3, 2, 3, 2, 3, 1, 3, 2, 3
107 };
108 
109 static const int8_t channel_reorder_lfe[16][9] = {
110  { 0, -1, -1, -1, -1, -1, -1, -1, -1 },
111  { 0, 1, -1, -1, -1, -1, -1, -1, -1 },
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  { 2, 0, 1, -1, -1, -1, -1, -1, -1 },
116  { 0, 1, 3, -1, -1, -1, -1, -1, -1 },
117  { 2, 0, 1, 4, -1, -1, -1, -1, -1 },
118  { 0, 1, 3, 4, -1, -1, -1, -1, -1 },
119  { 2, 0, 1, 4, 5, -1, -1, -1, -1 },
120  { 3, 4, 0, 1, 5, 6, -1, -1, -1 },
121  { 2, 0, 1, 4, 5, 6, -1, -1, -1 },
122  { 0, 6, 4, 5, 2, 3, -1, -1, -1 },
123  { 4, 2, 5, 0, 1, 6, 7, -1, -1 },
124  { 5, 6, 0, 1, 7, 3, 8, 4, -1 },
125  { 4, 2, 5, 0, 1, 6, 8, 7, -1 },
126 };
127 
128 static const int8_t channel_reorder_nolfe[16][9] = {
129  { 0, -1, -1, -1, -1, -1, -1, -1, -1 },
130  { 0, 1, -1, -1, -1, -1, -1, -1, -1 },
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  { 2, 0, 1, -1, -1, -1, -1, -1, -1 },
135  { 0, 1, 2, -1, -1, -1, -1, -1, -1 },
136  { 2, 0, 1, 3, -1, -1, -1, -1, -1 },
137  { 0, 1, 2, 3, -1, -1, -1, -1, -1 },
138  { 2, 0, 1, 3, 4, -1, -1, -1, -1 },
139  { 2, 3, 0, 1, 4, 5, -1, -1, -1 },
140  { 2, 0, 1, 3, 4, 5, -1, -1, -1 },
141  { 0, 5, 3, 4, 1, 2, -1, -1, -1 },
142  { 3, 2, 4, 0, 1, 5, 6, -1, -1 },
143  { 4, 5, 0, 1, 6, 2, 7, 3, -1 },
144  { 3, 2, 4, 0, 1, 5, 7, 6, -1 },
145 };
146 
147 #endif /* AVCODEC_DCAENC_H */
int32_t m
Definition: dcaenc.h:28
static const uint8_t bitstream_sfreq[]
Definition: dcaenc.h:36
static const uint16_t erb[]
Definition: dcaenc.h:46
static const int8_t channel_reorder_nolfe[16][9]
Definition: dcaenc.h:128
static const softfloat stepsize_inv[27]
Definition: dcaenc.h:51
uint8_t
static const softfloat scalefactor_inv[128]
Definition: dcaenc.h:61
static const int sample_rates[]
Definition: dcaenc.h:32
int32_t e
Definition: dcaenc.h:29
static const uint16_t fc[]
Definition: dcaenc.h:41
int32_t
static const int8_t channel_reorder_lfe[16][9]
Definition: dcaenc.h:109
static const int8_t lfe_index[16]
Definition: dcaenc.h:105
static const int bit_consumption[27]
Definition: dcaenc.h:99