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1 7adb10be Aurelien Jacobs
/*
2 14b70628 Justin Ruggles
 * AC-3 tables
3 7adb10be Aurelien Jacobs
 * copyright (c) 2001 Fabrice Bellard
4
 *
5 2912e87a Mans Rullgard
 * This file is part of Libav.
6 7adb10be Aurelien Jacobs
 *
7 2912e87a Mans Rullgard
 * Libav is free software; you can redistribute it and/or
8 7adb10be Aurelien Jacobs
 * 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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 *
12 2912e87a Mans Rullgard
 * Libav is distributed in the hope that it will be useful,
13 7adb10be Aurelien Jacobs
 * 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
18 2912e87a Mans Rullgard
 * License along with Libav; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20
 */
21
22
/**
23 ba87f080 Diego Biurrun
 * @file
24 14b70628 Justin Ruggles
 * tables taken directly from the AC-3 spec.
25 7adb10be Aurelien Jacobs
 */
26
27 737eb597 Reinhard Tartler
#include "libavutil/audioconvert.h"
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#include "avcodec.h"
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#include "ac3tab.h"
30
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/**
32
 * Possible frame sizes.
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 * from ATSC A/52 Table 5.18 Frame Size Code Table.
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 */
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const uint16_t ff_ac3_frame_size_tab[38][3] = {
36 7adb10be Aurelien Jacobs
    { 64,   69,   96   },
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    { 64,   70,   96   },
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    { 80,   87,   120  },
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    { 80,   88,   120  },
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    { 96,   104,  144  },
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    { 96,   105,  144  },
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    { 112,  121,  168  },
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    { 112,  122,  168  },
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    { 128,  139,  192  },
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    { 128,  140,  192  },
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    { 160,  174,  240  },
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    { 160,  175,  240  },
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    { 192,  208,  288  },
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    { 192,  209,  288  },
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    { 224,  243,  336  },
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    { 224,  244,  336  },
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    { 256,  278,  384  },
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    { 256,  279,  384  },
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    { 320,  348,  480  },
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    { 320,  349,  480  },
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    { 384,  417,  576  },
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    { 384,  418,  576  },
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    { 448,  487,  672  },
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    { 448,  488,  672  },
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    { 512,  557,  768  },
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    { 512,  558,  768  },
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    { 640,  696,  960  },
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    { 640,  697,  960  },
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    { 768,  835,  1152 },
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    { 768,  836,  1152 },
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    { 896,  975,  1344 },
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    { 896,  976,  1344 },
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    { 1024, 1114, 1536 },
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    { 1024, 1115, 1536 },
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    { 1152, 1253, 1728 },
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    { 1152, 1254, 1728 },
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    { 1280, 1393, 1920 },
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    { 1280, 1394, 1920 },
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};
75
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/**
77 49bd8e4b Måns Rullgård
 * Map audio coding mode (acmod) to number of full-bandwidth channels.
78 7adb10be Aurelien Jacobs
 * from ATSC A/52 Table 5.8 Audio Coding Mode
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 */
80 66ecf18e Justin Ruggles
const uint8_t ff_ac3_channels_tab[8] = {
81 7adb10be Aurelien Jacobs
    2, 1, 2, 3, 3, 4, 4, 5
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};
83
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/**
85 49bd8e4b Måns Rullgård
 * Map audio coding mode (acmod) to channel layout mask.
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 */
87
const uint16_t ff_ac3_channel_layout_tab[8] = {
88 63e8d976 Stefano Sabatini
    AV_CH_LAYOUT_STEREO,
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    AV_CH_LAYOUT_MONO,
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    AV_CH_LAYOUT_STEREO,
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    AV_CH_LAYOUT_SURROUND,
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    AV_CH_LAYOUT_2_1,
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    AV_CH_LAYOUT_4POINT0,
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    AV_CH_LAYOUT_2_2,
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    AV_CH_LAYOUT_5POINT0
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};
97
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#define COMMON_CHANNEL_MAP \
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    { { 0, 1,          }, { 0, 1, 2,         } },\
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    { { 0,             }, { 0, 1,            } },\
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    { { 0, 1,          }, { 0, 1, 2,         } },\
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    { { 0, 2, 1,       }, { 0, 2, 1, 3,      } },\
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    { { 0, 1, 2,       }, { 0, 1, 3, 2,      } },\
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    { { 0, 2, 1, 3,    }, { 0, 2, 1, 4, 3,   } },
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106 a7c6e117 Justin Ruggles
/**
107
 * Table to remap channels from SMPTE order to AC-3 order.
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 * [channel_mode][lfe][ch]
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 */
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const uint8_t ff_ac3_enc_channel_map[8][2][6] = {
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    COMMON_CHANNEL_MAP
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    { { 0, 1, 2, 3,    }, { 0, 1, 3, 4, 2,   } },
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    { { 0, 2, 1, 3, 4, }, { 0, 2, 1, 4, 5, 3 } },
114
};
115
116 95f3019a Justin Ruggles
/**
117
 * Table to remap channels from from AC-3 order to SMPTE order.
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 * [channel_mode][lfe][ch]
119
 */
120
const uint8_t ff_ac3_dec_channel_map[8][2][6] = {
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    COMMON_CHANNEL_MAP
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    { { 0, 1, 2, 3,    }, { 0, 1, 4, 2, 3,   } },
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    { { 0, 2, 1, 3, 4, }, { 0, 2, 1, 5, 3, 4 } },
124
};
125
126 7adb10be Aurelien Jacobs
/* possible frequencies */
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const uint16_t ff_ac3_sample_rate_tab[3] = { 48000, 44100, 32000 };
128 7adb10be Aurelien Jacobs
129
/* possible bitrates */
130 66ecf18e Justin Ruggles
const uint16_t ff_ac3_bitrate_tab[19] = {
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    32, 40, 48, 56, 64, 80, 96, 112, 128,
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    160, 192, 224, 256, 320, 384, 448, 512, 576, 640
133
};
134
135 dc7e07ac Justin Ruggles
/**
136
 * Table of bin locations for rematrixing bands
137
 * reference: Section 7.5.2 Rematrixing : Frequency Band Definitions
138
 */
139
const uint8_t ff_ac3_rematrix_band_tab[5] = { 13, 25, 37, 61, 253 };
140
141 14b70628 Justin Ruggles
/* AC-3 MDCT window */
142 7adb10be Aurelien Jacobs
143
/* MDCT window */
144 e6e98234 Justin Ruggles
DECLARE_ALIGNED(16, const int16_t, ff_ac3_window)[AC3_WINDOW_SIZE/2] = {
145 7adb10be Aurelien Jacobs
    4,    7,   12,   16,   21,   28,   34,   42,
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   51,   61,   72,   84,   97,  111,  127,  145,
147
  164,  184,  207,  231,  257,  285,  315,  347,
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  382,  419,  458,  500,  544,  591,  641,  694,
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  750,  810,  872,  937, 1007, 1079, 1155, 1235,
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 1318, 1406, 1497, 1593, 1692, 1796, 1903, 2016,
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 2132, 2253, 2379, 2509, 2644, 2783, 2927, 3076,
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 3230, 3389, 3552, 3721, 3894, 4072, 4255, 4444,
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 4637, 4835, 5038, 5246, 5459, 5677, 5899, 6127,
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 6359, 6596, 6837, 7083, 7334, 7589, 7848, 8112,
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 8380, 8652, 8927, 9207, 9491, 9778,10069,10363,
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10660,10960,11264,11570,11879,12190,12504,12820,
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13138,13458,13780,14103,14427,14753,15079,15407,
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15735,16063,16392,16720,17049,17377,17705,18032,
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18358,18683,19007,19330,19651,19970,20287,20602,
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20914,21225,21532,21837,22139,22438,22733,23025,
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23314,23599,23880,24157,24430,24699,24964,25225,
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25481,25732,25979,26221,26459,26691,26919,27142,
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27359,27572,27780,27983,28180,28373,28560,28742,
164
28919,29091,29258,29420,29577,29729,29876,30018,
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30155,30288,30415,30538,30657,30771,30880,30985,
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31086,31182,31274,31363,31447,31528,31605,31678,
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31747,31814,31877,31936,31993,32046,32097,32145,
168
32190,32232,32272,32310,32345,32378,32409,32438,
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32465,32490,32513,32535,32556,32574,32592,32608,
170
32623,32636,32649,32661,32671,32681,32690,32698,
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32705,32712,32718,32724,32729,32733,32737,32741,
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32744,32747,32750,32752,32754,32756,32757,32759,
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32760,32761,32762,32763,32764,32764,32765,32765,
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32766,32766,32766,32766,32767,32767,32767,32767,
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32767,32767,32767,32767,32767,32767,32767,32767,
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32767,32767,32767,32767,32767,32767,32767,32767,
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};
178
179 66ecf18e Justin Ruggles
const uint8_t ff_ac3_log_add_tab[260]= {
180 b9b7472e Michael Niedermayer
0x40,0x3f,0x3e,0x3d,0x3c,0x3b,0x3a,0x39,0x38,0x37,
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0x36,0x35,0x34,0x34,0x33,0x32,0x31,0x30,0x2f,0x2f,
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0x2e,0x2d,0x2c,0x2c,0x2b,0x2a,0x29,0x29,0x28,0x27,
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0x26,0x26,0x25,0x24,0x24,0x23,0x23,0x22,0x21,0x21,
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0x20,0x20,0x1f,0x1e,0x1e,0x1d,0x1d,0x1c,0x1c,0x1b,
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0x1b,0x1a,0x1a,0x19,0x19,0x18,0x18,0x17,0x17,0x16,
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0x16,0x15,0x15,0x15,0x14,0x14,0x13,0x13,0x13,0x12,
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0x12,0x12,0x11,0x11,0x11,0x10,0x10,0x10,0x0f,0x0f,
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0x0f,0x0e,0x0e,0x0e,0x0d,0x0d,0x0d,0x0d,0x0c,0x0c,
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0x0c,0x0c,0x0b,0x0b,0x0b,0x0b,0x0a,0x0a,0x0a,0x0a,
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0x0a,0x09,0x09,0x09,0x09,0x09,0x08,0x08,0x08,0x08,
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0x08,0x08,0x07,0x07,0x07,0x07,0x07,0x07,0x06,0x06,
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0x06,0x06,0x06,0x06,0x06,0x06,0x05,0x05,0x05,0x05,
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0x05,0x05,0x05,0x05,0x04,0x04,0x04,0x04,0x04,0x04,
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0x04,0x04,0x04,0x04,0x04,0x03,0x03,0x03,0x03,0x03,
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0x03,0x03,0x03,0x03,0x03,0x03,0x03,0x03,0x03,0x02,
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0x02,0x02,0x02,0x02,0x02,0x02,0x02,0x02,0x02,0x02,
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0x02,0x02,0x02,0x02,0x02,0x02,0x02,0x02,0x01,0x01,
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0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,
199
0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,
200
0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,
201
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
202
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
206 7adb10be Aurelien Jacobs
};
207
208 e0b9f94b Justin Ruggles
const uint16_t ff_ac3_hearing_threshold_tab[AC3_CRITICAL_BANDS][3]= {
209 7adb10be Aurelien Jacobs
{ 0x04d0,0x04f0,0x0580 },
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{ 0x04d0,0x04f0,0x0580 },
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{ 0x0440,0x0460,0x04b0 },
212
{ 0x0400,0x0410,0x0450 },
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{ 0x03e0,0x03e0,0x0420 },
214
{ 0x03c0,0x03d0,0x03f0 },
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{ 0x03b0,0x03c0,0x03e0 },
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{ 0x03b0,0x03b0,0x03d0 },
217
{ 0x03a0,0x03b0,0x03c0 },
218
{ 0x03a0,0x03a0,0x03b0 },
219
{ 0x03a0,0x03a0,0x03b0 },
220
{ 0x03a0,0x03a0,0x03b0 },
221
{ 0x03a0,0x03a0,0x03a0 },
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{ 0x0390,0x03a0,0x03a0 },
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{ 0x0390,0x0390,0x03a0 },
224
{ 0x0390,0x0390,0x03a0 },
225
{ 0x0380,0x0390,0x03a0 },
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{ 0x0380,0x0380,0x03a0 },
227
{ 0x0370,0x0380,0x03a0 },
228
{ 0x0370,0x0380,0x03a0 },
229
{ 0x0360,0x0370,0x0390 },
230
{ 0x0360,0x0370,0x0390 },
231
{ 0x0350,0x0360,0x0390 },
232
{ 0x0350,0x0360,0x0390 },
233
{ 0x0340,0x0350,0x0380 },
234
{ 0x0340,0x0350,0x0380 },
235
{ 0x0330,0x0340,0x0380 },
236
{ 0x0320,0x0340,0x0370 },
237
{ 0x0310,0x0320,0x0360 },
238
{ 0x0300,0x0310,0x0350 },
239
{ 0x02f0,0x0300,0x0340 },
240
{ 0x02f0,0x02f0,0x0330 },
241
{ 0x02f0,0x02f0,0x0320 },
242
{ 0x02f0,0x02f0,0x0310 },
243
{ 0x0300,0x02f0,0x0300 },
244
{ 0x0310,0x0300,0x02f0 },
245
{ 0x0340,0x0320,0x02f0 },
246
{ 0x0390,0x0350,0x02f0 },
247
{ 0x03e0,0x0390,0x0300 },
248
{ 0x0420,0x03e0,0x0310 },
249
{ 0x0460,0x0420,0x0330 },
250
{ 0x0490,0x0450,0x0350 },
251
{ 0x04a0,0x04a0,0x03c0 },
252
{ 0x0460,0x0490,0x0410 },
253
{ 0x0440,0x0460,0x0470 },
254
{ 0x0440,0x0440,0x04a0 },
255
{ 0x0520,0x0480,0x0460 },
256
{ 0x0800,0x0630,0x0440 },
257
{ 0x0840,0x0840,0x0450 },
258
{ 0x0840,0x0840,0x04e0 },
259
};
260
261 66ecf18e Justin Ruggles
const uint8_t ff_ac3_bap_tab[64]= {
262 7adb10be Aurelien Jacobs
    0, 1, 1, 1, 1, 1, 2, 2, 3, 3,
263
    3, 4, 4, 5, 5, 6, 6, 6, 6, 7,
264
    7, 7, 7, 8, 8, 8, 8, 9, 9, 9,
265
    9, 10, 10, 10, 10, 11, 11, 11, 11, 12,
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    12, 12, 12, 13, 13, 13, 13, 14, 14, 14,
267
    14, 14, 14, 14, 14, 15, 15, 15, 15, 15,
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    15, 15, 15, 15,
269
};
270
271 66ecf18e Justin Ruggles
const uint8_t ff_ac3_slow_decay_tab[4]={
272 7adb10be Aurelien Jacobs
    0x0f, 0x11, 0x13, 0x15,
273
};
274
275 66ecf18e Justin Ruggles
const uint8_t ff_ac3_fast_decay_tab[4]={
276 7adb10be Aurelien Jacobs
    0x3f, 0x53, 0x67, 0x7b,
277
};
278
279 66ecf18e Justin Ruggles
const uint16_t ff_ac3_slow_gain_tab[4]= {
280 7adb10be Aurelien Jacobs
    0x540, 0x4d8, 0x478, 0x410,
281
};
282
283 66ecf18e Justin Ruggles
const uint16_t ff_ac3_db_per_bit_tab[4]= {
284 7adb10be Aurelien Jacobs
    0x000, 0x700, 0x900, 0xb00,
285
};
286
287 66ecf18e Justin Ruggles
const int16_t ff_ac3_floor_tab[8]= {
288 7adb10be Aurelien Jacobs
    0x2f0, 0x2b0, 0x270, 0x230, 0x1f0, 0x170, 0x0f0, 0xf800,
289
};
290
291 66ecf18e Justin Ruggles
const uint16_t ff_ac3_fast_gain_tab[8]= {
292 7adb10be Aurelien Jacobs
    0x080, 0x100, 0x180, 0x200, 0x280, 0x300, 0x380, 0x400,
293
};
294
295 0c79b140 Bartlomiej Wolowiec
/**
296
 * Default channel map for a dependent substream defined by acmod
297
 */
298
const uint16_t ff_eac3_default_chmap[8] = {
299
    AC3_CHMAP_L |               AC3_CHMAP_R, // FIXME Ch1+Ch2
300
                  AC3_CHMAP_C,
301
    AC3_CHMAP_L |               AC3_CHMAP_R,
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    AC3_CHMAP_L | AC3_CHMAP_C | AC3_CHMAP_R,
303
    AC3_CHMAP_L |               AC3_CHMAP_R |                   AC3_CHMAP_C_SUR,
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    AC3_CHMAP_L | AC3_CHMAP_C | AC3_CHMAP_R |                   AC3_CHMAP_C_SUR,
305
    AC3_CHMAP_L |               AC3_CHMAP_R | AC3_CHMAP_L_SUR |                  AC3_CHMAP_R_SUR,
306
    AC3_CHMAP_L | AC3_CHMAP_C | AC3_CHMAP_R | AC3_CHMAP_L_SUR |                  AC3_CHMAP_R_SUR
307
};