GCC Code Coverage Report | |||||||||||||||||||||
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Line | Branch | Exec | Source |
1 |
/* |
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2 |
* MPEG-4 ALS decoder |
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3 |
* Copyright (c) 2009 Thilo Borgmann <thilo.borgmann _at_ mail.de> |
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4 |
* |
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5 |
* This file is part of FFmpeg. |
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6 |
* |
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7 |
* FFmpeg is free software; you can redistribute it and/or |
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8 |
* modify it under the terms of the GNU Lesser General Public |
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9 |
* License as published by the Free Software Foundation; either |
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10 |
* version 2.1 of the License, or (at your option) any later version. |
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11 |
* |
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12 |
* FFmpeg is distributed in the hope that it will be useful, |
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13 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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15 |
* Lesser General Public License for more details. |
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16 |
* |
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17 |
* You should have received a copy of the GNU Lesser General Public |
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18 |
* License along with FFmpeg; if not, write to the Free Software |
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19 |
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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20 |
*/ |
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21 |
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22 |
/** |
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23 |
* @file |
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24 |
* MPEG-4 ALS decoder |
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25 |
* @author Thilo Borgmann <thilo.borgmann _at_ mail.de> |
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26 |
*/ |
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27 |
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28 |
#include <inttypes.h> |
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29 |
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30 |
#include "avcodec.h" |
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31 |
#include "get_bits.h" |
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32 |
#include "unary.h" |
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33 |
#include "mpeg4audio.h" |
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34 |
#include "bgmc.h" |
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35 |
#include "bswapdsp.h" |
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36 |
#include "internal.h" |
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37 |
#include "mlz.h" |
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38 |
#include "libavutil/samplefmt.h" |
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39 |
#include "libavutil/crc.h" |
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40 |
#include "libavutil/softfloat_ieee754.h" |
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41 |
#include "libavutil/intfloat.h" |
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42 |
#include "libavutil/intreadwrite.h" |
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43 |
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44 |
#include <stdint.h> |
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45 |
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46 |
/** Rice parameters and corresponding index offsets for decoding the |
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47 |
* indices of scaled PARCOR values. The table chosen is set globally |
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48 |
* by the encoder and stored in ALSSpecificConfig. |
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49 |
*/ |
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50 |
static const int8_t parcor_rice_table[3][20][2] = { |
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51 |
{ {-52, 4}, {-29, 5}, {-31, 4}, { 19, 4}, {-16, 4}, |
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52 |
{ 12, 3}, { -7, 3}, { 9, 3}, { -5, 3}, { 6, 3}, |
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53 |
{ -4, 3}, { 3, 3}, { -3, 2}, { 3, 2}, { -2, 2}, |
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54 |
{ 3, 2}, { -1, 2}, { 2, 2}, { -1, 2}, { 2, 2} }, |
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55 |
{ {-58, 3}, {-42, 4}, {-46, 4}, { 37, 5}, {-36, 4}, |
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56 |
{ 29, 4}, {-29, 4}, { 25, 4}, {-23, 4}, { 20, 4}, |
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57 |
{-17, 4}, { 16, 4}, {-12, 4}, { 12, 3}, {-10, 4}, |
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58 |
{ 7, 3}, { -4, 4}, { 3, 3}, { -1, 3}, { 1, 3} }, |
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59 |
{ {-59, 3}, {-45, 5}, {-50, 4}, { 38, 4}, {-39, 4}, |
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60 |
{ 32, 4}, {-30, 4}, { 25, 3}, {-23, 3}, { 20, 3}, |
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61 |
{-20, 3}, { 16, 3}, {-13, 3}, { 10, 3}, { -7, 3}, |
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62 |
{ 3, 3}, { 0, 3}, { -1, 3}, { 2, 3}, { -1, 2} } |
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63 |
}; |
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64 |
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65 |
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66 |
/** Scaled PARCOR values used for the first two PARCOR coefficients. |
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67 |
* To be indexed by the Rice coded indices. |
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68 |
* Generated by: parcor_scaled_values[i] = 32 + ((i * (i+1)) << 7) - (1 << 20) |
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69 |
* Actual values are divided by 32 in order to be stored in 16 bits. |
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70 |
*/ |
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71 |
static const int16_t parcor_scaled_values[] = { |
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72 |
-1048544 / 32, -1048288 / 32, -1047776 / 32, -1047008 / 32, |
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73 |
-1045984 / 32, -1044704 / 32, -1043168 / 32, -1041376 / 32, |
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74 |
-1039328 / 32, -1037024 / 32, -1034464 / 32, -1031648 / 32, |
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75 |
-1028576 / 32, -1025248 / 32, -1021664 / 32, -1017824 / 32, |
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76 |
-1013728 / 32, -1009376 / 32, -1004768 / 32, -999904 / 32, |
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77 |
-994784 / 32, -989408 / 32, -983776 / 32, -977888 / 32, |
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78 |
-971744 / 32, -965344 / 32, -958688 / 32, -951776 / 32, |
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79 |
-944608 / 32, -937184 / 32, -929504 / 32, -921568 / 32, |
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80 |
-913376 / 32, -904928 / 32, -896224 / 32, -887264 / 32, |
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81 |
-878048 / 32, -868576 / 32, -858848 / 32, -848864 / 32, |
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82 |
-838624 / 32, -828128 / 32, -817376 / 32, -806368 / 32, |
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83 |
-795104 / 32, -783584 / 32, -771808 / 32, -759776 / 32, |
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84 |
-747488 / 32, -734944 / 32, -722144 / 32, -709088 / 32, |
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85 |
-695776 / 32, -682208 / 32, -668384 / 32, -654304 / 32, |
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86 |
-639968 / 32, -625376 / 32, -610528 / 32, -595424 / 32, |
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87 |
-580064 / 32, -564448 / 32, -548576 / 32, -532448 / 32, |
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88 |
-516064 / 32, -499424 / 32, -482528 / 32, -465376 / 32, |
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89 |
-447968 / 32, -430304 / 32, -412384 / 32, -394208 / 32, |
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90 |
-375776 / 32, -357088 / 32, -338144 / 32, -318944 / 32, |
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91 |
-299488 / 32, -279776 / 32, -259808 / 32, -239584 / 32, |
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92 |
-219104 / 32, -198368 / 32, -177376 / 32, -156128 / 32, |
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93 |
-134624 / 32, -112864 / 32, -90848 / 32, -68576 / 32, |
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94 |
-46048 / 32, -23264 / 32, -224 / 32, 23072 / 32, |
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95 |
46624 / 32, 70432 / 32, 94496 / 32, 118816 / 32, |
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96 |
143392 / 32, 168224 / 32, 193312 / 32, 218656 / 32, |
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97 |
244256 / 32, 270112 / 32, 296224 / 32, 322592 / 32, |
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98 |
349216 / 32, 376096 / 32, 403232 / 32, 430624 / 32, |
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99 |
458272 / 32, 486176 / 32, 514336 / 32, 542752 / 32, |
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100 |
571424 / 32, 600352 / 32, 629536 / 32, 658976 / 32, |
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101 |
688672 / 32, 718624 / 32, 748832 / 32, 779296 / 32, |
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102 |
810016 / 32, 840992 / 32, 872224 / 32, 903712 / 32, |
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103 |
935456 / 32, 967456 / 32, 999712 / 32, 1032224 / 32 |
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104 |
}; |
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105 |
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106 |
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107 |
/** Gain values of p(0) for long-term prediction. |
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108 |
* To be indexed by the Rice coded indices. |
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109 |
*/ |
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110 |
static const uint8_t ltp_gain_values [4][4] = { |
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111 |
{ 0, 8, 16, 24}, |
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112 |
{32, 40, 48, 56}, |
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113 |
{64, 70, 76, 82}, |
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114 |
{88, 92, 96, 100} |
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115 |
}; |
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116 |
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117 |
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118 |
/** Inter-channel weighting factors for multi-channel correlation. |
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119 |
* To be indexed by the Rice coded indices. |
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120 |
*/ |
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121 |
static const int16_t mcc_weightings[] = { |
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122 |
204, 192, 179, 166, 153, 140, 128, 115, |
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123 |
102, 89, 76, 64, 51, 38, 25, 12, |
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124 |
0, -12, -25, -38, -51, -64, -76, -89, |
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125 |
-102, -115, -128, -140, -153, -166, -179, -192 |
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126 |
}; |
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127 |
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128 |
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129 |
/** Tail codes used in arithmetic coding using block Gilbert-Moore codes. |
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130 |
*/ |
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131 |
static const uint8_t tail_code[16][6] = { |
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132 |
{ 74, 44, 25, 13, 7, 3}, |
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133 |
{ 68, 42, 24, 13, 7, 3}, |
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134 |
{ 58, 39, 23, 13, 7, 3}, |
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135 |
{126, 70, 37, 19, 10, 5}, |
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136 |
{132, 70, 37, 20, 10, 5}, |
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137 |
{124, 70, 38, 20, 10, 5}, |
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138 |
{120, 69, 37, 20, 11, 5}, |
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139 |
{116, 67, 37, 20, 11, 5}, |
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140 |
{108, 66, 36, 20, 10, 5}, |
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141 |
{102, 62, 36, 20, 10, 5}, |
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142 |
{ 88, 58, 34, 19, 10, 5}, |
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143 |
{162, 89, 49, 25, 13, 7}, |
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144 |
{156, 87, 49, 26, 14, 7}, |
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145 |
{150, 86, 47, 26, 14, 7}, |
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146 |
{142, 84, 47, 26, 14, 7}, |
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147 |
{131, 79, 46, 26, 14, 7} |
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148 |
}; |
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149 |
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150 |
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151 |
enum RA_Flag { |
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152 |
RA_FLAG_NONE, |
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153 |
RA_FLAG_FRAMES, |
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154 |
RA_FLAG_HEADER |
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155 |
}; |
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156 |
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157 |
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158 |
typedef struct ALSSpecificConfig { |
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159 |
uint32_t samples; ///< number of samples, 0xFFFFFFFF if unknown |
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160 |
int resolution; ///< 000 = 8-bit; 001 = 16-bit; 010 = 24-bit; 011 = 32-bit |
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161 |
int floating; ///< 1 = IEEE 32-bit floating-point, 0 = integer |
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162 |
int msb_first; ///< 1 = original CRC calculated on big-endian system, 0 = little-endian |
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163 |
int frame_length; ///< frame length for each frame (last frame may differ) |
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164 |
int ra_distance; ///< distance between RA frames (in frames, 0...255) |
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165 |
enum RA_Flag ra_flag; ///< indicates where the size of ra units is stored |
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166 |
int adapt_order; ///< adaptive order: 1 = on, 0 = off |
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167 |
int coef_table; ///< table index of Rice code parameters |
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168 |
int long_term_prediction; ///< long term prediction (LTP): 1 = on, 0 = off |
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169 |
int max_order; ///< maximum prediction order (0..1023) |
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170 |
int block_switching; ///< number of block switching levels |
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171 |
int bgmc; ///< "Block Gilbert-Moore Code": 1 = on, 0 = off (Rice coding only) |
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172 |
int sb_part; ///< sub-block partition |
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173 |
int joint_stereo; ///< joint stereo: 1 = on, 0 = off |
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174 |
int mc_coding; ///< extended inter-channel coding (multi channel coding): 1 = on, 0 = off |
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175 |
int chan_config; ///< indicates that a chan_config_info field is present |
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176 |
int chan_sort; ///< channel rearrangement: 1 = on, 0 = off |
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177 |
int rlslms; ///< use "Recursive Least Square-Least Mean Square" predictor: 1 = on, 0 = off |
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178 |
int chan_config_info; ///< mapping of channels to loudspeaker locations. Unused until setting channel configuration is implemented. |
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179 |
int *chan_pos; ///< original channel positions |
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180 |
int crc_enabled; ///< enable Cyclic Redundancy Checksum |
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181 |
} ALSSpecificConfig; |
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182 |
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183 |
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184 |
typedef struct ALSChannelData { |
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185 |
int stop_flag; |
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186 |
int master_channel; |
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187 |
int time_diff_flag; |
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188 |
int time_diff_sign; |
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189 |
int time_diff_index; |
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190 |
int weighting[6]; |
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191 |
} ALSChannelData; |
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192 |
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193 |
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194 |
typedef struct ALSDecContext { |
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195 |
AVCodecContext *avctx; |
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196 |
ALSSpecificConfig sconf; |
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197 |
GetBitContext gb; |
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198 |
BswapDSPContext bdsp; |
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199 |
const AVCRC *crc_table; |
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200 |
uint32_t crc_org; ///< CRC value of the original input data |
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201 |
uint32_t crc; ///< CRC value calculated from decoded data |
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202 |
unsigned int cur_frame_length; ///< length of the current frame to decode |
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203 |
unsigned int frame_id; ///< the frame ID / number of the current frame |
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204 |
unsigned int js_switch; ///< if true, joint-stereo decoding is enforced |
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205 |
unsigned int cs_switch; ///< if true, channel rearrangement is done |
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206 |
unsigned int num_blocks; ///< number of blocks used in the current frame |
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207 |
unsigned int s_max; ///< maximum Rice parameter allowed in entropy coding |
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208 |
uint8_t *bgmc_lut; ///< pointer at lookup tables used for BGMC |
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209 |
int *bgmc_lut_status; ///< pointer at lookup table status flags used for BGMC |
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210 |
int ltp_lag_length; ///< number of bits used for ltp lag value |
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211 |
int *const_block; ///< contains const_block flags for all channels |
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212 |
unsigned int *shift_lsbs; ///< contains shift_lsbs flags for all channels |
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213 |
unsigned int *opt_order; ///< contains opt_order flags for all channels |
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214 |
int *store_prev_samples; ///< contains store_prev_samples flags for all channels |
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215 |
int *use_ltp; ///< contains use_ltp flags for all channels |
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216 |
int *ltp_lag; ///< contains ltp lag values for all channels |
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217 |
int **ltp_gain; ///< gain values for ltp 5-tap filter for a channel |
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218 |
int *ltp_gain_buffer; ///< contains all gain values for ltp 5-tap filter |
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219 |
int32_t **quant_cof; ///< quantized parcor coefficients for a channel |
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220 |
int32_t *quant_cof_buffer; ///< contains all quantized parcor coefficients |
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221 |
int32_t **lpc_cof; ///< coefficients of the direct form prediction filter for a channel |
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222 |
int32_t *lpc_cof_buffer; ///< contains all coefficients of the direct form prediction filter |
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223 |
int32_t *lpc_cof_reversed_buffer; ///< temporary buffer to set up a reversed versio of lpc_cof_buffer |
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224 |
ALSChannelData **chan_data; ///< channel data for multi-channel correlation |
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225 |
ALSChannelData *chan_data_buffer; ///< contains channel data for all channels |
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226 |
int *reverted_channels; ///< stores a flag for each reverted channel |
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227 |
int32_t *prev_raw_samples; ///< contains unshifted raw samples from the previous block |
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228 |
int32_t **raw_samples; ///< decoded raw samples for each channel |
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229 |
int32_t *raw_buffer; ///< contains all decoded raw samples including carryover samples |
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230 |
uint8_t *crc_buffer; ///< buffer of byte order corrected samples used for CRC check |
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231 |
MLZ* mlz; ///< masked lz decompression structure |
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232 |
SoftFloat_IEEE754 *acf; ///< contains common multiplier for all channels |
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233 |
int *last_acf_mantissa; ///< contains the last acf mantissa data of common multiplier for all channels |
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234 |
int *shift_value; ///< value by which the binary point is to be shifted for all channels |
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235 |
int *last_shift_value; ///< contains last shift value for all channels |
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236 |
int **raw_mantissa; ///< decoded mantissa bits of the difference signal |
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237 |
unsigned char *larray; ///< buffer to store the output of masked lz decompression |
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238 |
int *nbits; ///< contains the number of bits to read for masked lz decompression for all samples |
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239 |
int highest_decoded_channel; |
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240 |
} ALSDecContext; |
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241 |
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242 |
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243 |
typedef struct ALSBlockData { |
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244 |
unsigned int block_length; ///< number of samples within the block |
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245 |
unsigned int ra_block; ///< if true, this is a random access block |
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246 |
int *const_block; ///< if true, this is a constant value block |
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247 |
int js_blocks; ///< true if this block contains a difference signal |
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248 |
unsigned int *shift_lsbs; ///< shift of values for this block |
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249 |
unsigned int *opt_order; ///< prediction order of this block |
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250 |
int *store_prev_samples;///< if true, carryover samples have to be stored |
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251 |
int *use_ltp; ///< if true, long-term prediction is used |
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252 |
int *ltp_lag; ///< lag value for long-term prediction |
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253 |
int *ltp_gain; ///< gain values for ltp 5-tap filter |
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254 |
int32_t *quant_cof; ///< quantized parcor coefficients |
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255 |
int32_t *lpc_cof; ///< coefficients of the direct form prediction |
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256 |
int32_t *raw_samples; ///< decoded raw samples / residuals for this block |
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257 |
int32_t *prev_raw_samples; ///< contains unshifted raw samples from the previous block |
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258 |
int32_t *raw_other; ///< decoded raw samples of the other channel of a channel pair |
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259 |
} ALSBlockData; |
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260 |
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261 |
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262 |
14 |
static av_cold void dprint_specific_config(ALSDecContext *ctx) |
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263 |
{ |
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264 |
#ifdef DEBUG |
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265 |
AVCodecContext *avctx = ctx->avctx; |
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266 |
ALSSpecificConfig *sconf = &ctx->sconf; |
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267 |
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268 |
ff_dlog(avctx, "resolution = %i\n", sconf->resolution); |
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269 |
ff_dlog(avctx, "floating = %i\n", sconf->floating); |
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270 |
ff_dlog(avctx, "frame_length = %i\n", sconf->frame_length); |
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271 |
ff_dlog(avctx, "ra_distance = %i\n", sconf->ra_distance); |
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272 |
ff_dlog(avctx, "ra_flag = %i\n", sconf->ra_flag); |
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273 |
ff_dlog(avctx, "adapt_order = %i\n", sconf->adapt_order); |
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274 |
ff_dlog(avctx, "coef_table = %i\n", sconf->coef_table); |
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275 |
ff_dlog(avctx, "long_term_prediction = %i\n", sconf->long_term_prediction); |
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276 |
ff_dlog(avctx, "max_order = %i\n", sconf->max_order); |
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277 |
ff_dlog(avctx, "block_switching = %i\n", sconf->block_switching); |
||
278 |
ff_dlog(avctx, "bgmc = %i\n", sconf->bgmc); |
||
279 |
ff_dlog(avctx, "sb_part = %i\n", sconf->sb_part); |
||
280 |
ff_dlog(avctx, "joint_stereo = %i\n", sconf->joint_stereo); |
||
281 |
ff_dlog(avctx, "mc_coding = %i\n", sconf->mc_coding); |
||
282 |
ff_dlog(avctx, "chan_config = %i\n", sconf->chan_config); |
||
283 |
ff_dlog(avctx, "chan_sort = %i\n", sconf->chan_sort); |
||
284 |
ff_dlog(avctx, "RLSLMS = %i\n", sconf->rlslms); |
||
285 |
ff_dlog(avctx, "chan_config_info = %i\n", sconf->chan_config_info); |
||
286 |
#endif |
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287 |
14 |
} |
|
288 |
|||
289 |
|||
290 |
/** Read an ALSSpecificConfig from a buffer into the output struct. |
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291 |
*/ |
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292 |
14 |
static av_cold int read_specific_config(ALSDecContext *ctx) |
|
293 |
{ |
||
294 |
GetBitContext gb; |
||
295 |
uint64_t ht_size; |
||
296 |
int i, config_offset; |
||
297 |
14 |
MPEG4AudioConfig m4ac = {0}; |
|
298 |
14 |
ALSSpecificConfig *sconf = &ctx->sconf; |
|
299 |
14 |
AVCodecContext *avctx = ctx->avctx; |
|
300 |
uint32_t als_id, header_size, trailer_size; |
||
301 |
int ret; |
||
302 |
|||
303 |
✗✓ | 14 |
if ((ret = init_get_bits8(&gb, avctx->extradata, avctx->extradata_size)) < 0) |
304 |
return ret; |
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305 |
|||
306 |
14 |
config_offset = avpriv_mpeg4audio_get_config2(&m4ac, avctx->extradata, |
|
307 |
avctx->extradata_size, 1, avctx); |
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308 |
|||
309 |
✗✓ | 14 |
if (config_offset < 0) |
310 |
return AVERROR_INVALIDDATA; |
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311 |
|||
312 |
14 |
skip_bits_long(&gb, config_offset); |
|
313 |
|||
314 |
✗✓ | 14 |
if (get_bits_left(&gb) < (30 << 3)) |
315 |
return AVERROR_INVALIDDATA; |
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316 |
|||
317 |
// read the fixed items |
||
318 |
14 |
als_id = get_bits_long(&gb, 32); |
|
319 |
14 |
avctx->sample_rate = m4ac.sample_rate; |
|
320 |
14 |
skip_bits_long(&gb, 32); // sample rate already known |
|
321 |
14 |
sconf->samples = get_bits_long(&gb, 32); |
|
322 |
14 |
avctx->channels = m4ac.channels; |
|
323 |
14 |
skip_bits(&gb, 16); // number of channels already known |
|
324 |
14 |
skip_bits(&gb, 3); // skip file_type |
|
325 |
14 |
sconf->resolution = get_bits(&gb, 3); |
|
326 |
14 |
sconf->floating = get_bits1(&gb); |
|
327 |
14 |
sconf->msb_first = get_bits1(&gb); |
|
328 |
14 |
sconf->frame_length = get_bits(&gb, 16) + 1; |
|
329 |
14 |
sconf->ra_distance = get_bits(&gb, 8); |
|
330 |
14 |
sconf->ra_flag = get_bits(&gb, 2); |
|
331 |
14 |
sconf->adapt_order = get_bits1(&gb); |
|
332 |
14 |
sconf->coef_table = get_bits(&gb, 2); |
|
333 |
14 |
sconf->long_term_prediction = get_bits1(&gb); |
|
334 |
14 |
sconf->max_order = get_bits(&gb, 10); |
|
335 |
14 |
sconf->block_switching = get_bits(&gb, 2); |
|
336 |
14 |
sconf->bgmc = get_bits1(&gb); |
|
337 |
14 |
sconf->sb_part = get_bits1(&gb); |
|
338 |
14 |
sconf->joint_stereo = get_bits1(&gb); |
|
339 |
14 |
sconf->mc_coding = get_bits1(&gb); |
|
340 |
14 |
sconf->chan_config = get_bits1(&gb); |
|
341 |
14 |
sconf->chan_sort = get_bits1(&gb); |
|
342 |
14 |
sconf->crc_enabled = get_bits1(&gb); |
|
343 |
14 |
sconf->rlslms = get_bits1(&gb); |
|
344 |
14 |
skip_bits(&gb, 5); // skip 5 reserved bits |
|
345 |
14 |
skip_bits1(&gb); // skip aux_data_enabled |
|
346 |
|||
347 |
|||
348 |
// check for ALSSpecificConfig struct |
||
349 |
✗✓ | 14 |
if (als_id != MKBETAG('A','L','S','\0')) |
350 |
return AVERROR_INVALIDDATA; |
||
351 |
|||
352 |
✗✓ | 14 |
if (avctx->channels > FF_SANE_NB_CHANNELS) { |
353 |
avpriv_request_sample(avctx, "Huge number of channels"); |
||
354 |
return AVERROR_PATCHWELCOME; |
||
355 |
} |
||
356 |
|||
357 |
14 |
ctx->cur_frame_length = sconf->frame_length; |
|
358 |
|||
359 |
// read channel config |
||
360 |
✗✓ | 14 |
if (sconf->chan_config) |
361 |
sconf->chan_config_info = get_bits(&gb, 16); |
||
362 |
// TODO: use this to set avctx->channel_layout |
||
363 |
|||
364 |
|||
365 |
// read channel sorting |
||
366 |
✗✓✗✗ |
14 |
if (sconf->chan_sort && avctx->channels > 1) { |
367 |
int chan_pos_bits = av_ceil_log2(avctx->channels); |
||
368 |
int bits_needed = avctx->channels * chan_pos_bits + 7; |
||
369 |
if (get_bits_left(&gb) < bits_needed) |
||
370 |
return AVERROR_INVALIDDATA; |
||
371 |
|||
372 |
if (!(sconf->chan_pos = av_malloc_array(avctx->channels, sizeof(*sconf->chan_pos)))) |
||
373 |
return AVERROR(ENOMEM); |
||
374 |
|||
375 |
ctx->cs_switch = 1; |
||
376 |
|||
377 |
for (i = 0; i < avctx->channels; i++) { |
||
378 |
sconf->chan_pos[i] = -1; |
||
379 |
} |
||
380 |
|||
381 |
for (i = 0; i < avctx->channels; i++) { |
||
382 |
int idx; |
||
383 |
|||
384 |
idx = get_bits(&gb, chan_pos_bits); |
||
385 |
if (idx >= avctx->channels || sconf->chan_pos[idx] != -1) { |
||
386 |
av_log(avctx, AV_LOG_WARNING, "Invalid channel reordering.\n"); |
||
387 |
ctx->cs_switch = 0; |
||
388 |
break; |
||
389 |
} |
||
390 |
sconf->chan_pos[idx] = i; |
||
391 |
} |
||
392 |
|||
393 |
align_get_bits(&gb); |
||
394 |
} |
||
395 |
|||
396 |
|||
397 |
// read fixed header and trailer sizes, |
||
398 |
// if size = 0xFFFFFFFF then there is no data field! |
||
399 |
✗✓ | 14 |
if (get_bits_left(&gb) < 64) |
400 |
return AVERROR_INVALIDDATA; |
||
401 |
|||
402 |
14 |
header_size = get_bits_long(&gb, 32); |
|
403 |
14 |
trailer_size = get_bits_long(&gb, 32); |
|
404 |
✗✓ | 14 |
if (header_size == 0xFFFFFFFF) |
405 |
header_size = 0; |
||
406 |
✗✓ | 14 |
if (trailer_size == 0xFFFFFFFF) |
407 |
trailer_size = 0; |
||
408 |
|||
409 |
14 |
ht_size = ((int64_t)(header_size) + (int64_t)(trailer_size)) << 3; |
|
410 |
|||
411 |
|||
412 |
// skip the header and trailer data |
||
413 |
✗✓ | 14 |
if (get_bits_left(&gb) < ht_size) |
414 |
return AVERROR_INVALIDDATA; |
||
415 |
|||
416 |
✗✓ | 14 |
if (ht_size > INT32_MAX) |
417 |
return AVERROR_PATCHWELCOME; |
||
418 |
|||
419 |
14 |
skip_bits_long(&gb, ht_size); |
|
420 |
|||
421 |
|||
422 |
// initialize CRC calculation |
||
423 |
✓✗ | 14 |
if (sconf->crc_enabled) { |
424 |
✗✓ | 14 |
if (get_bits_left(&gb) < 32) |
425 |
return AVERROR_INVALIDDATA; |
||
426 |
|||
427 |
✗✓ | 14 |
if (avctx->err_recognition & (AV_EF_CRCCHECK|AV_EF_CAREFUL)) { |
428 |
ctx->crc_table = av_crc_get_table(AV_CRC_32_IEEE_LE); |
||
429 |
ctx->crc = 0xFFFFFFFF; |
||
430 |
ctx->crc_org = ~get_bits_long(&gb, 32); |
||
431 |
} else |
||
432 |
14 |
skip_bits_long(&gb, 32); |
|
433 |
} |
||
434 |
|||
435 |
|||
436 |
// no need to read the rest of ALSSpecificConfig (ra_unit_size & aux data) |
||
437 |
|||
438 |
14 |
dprint_specific_config(ctx); |
|
439 |
|||
440 |
14 |
return 0; |
|
441 |
} |
||
442 |
|||
443 |
|||
444 |
/** Check the ALSSpecificConfig for unsupported features. |
||
445 |
*/ |
||
446 |
14 |
static int check_specific_config(ALSDecContext *ctx) |
|
447 |
{ |
||
448 |
14 |
ALSSpecificConfig *sconf = &ctx->sconf; |
|
449 |
14 |
int error = 0; |
|
450 |
|||
451 |
// report unsupported feature and set error value |
||
452 |
#define MISSING_ERR(cond, str, errval) \ |
||
453 |
{ \ |
||
454 |
if (cond) { \ |
||
455 |
avpriv_report_missing_feature(ctx->avctx, \ |
||
456 |
str); \ |
||
457 |
error = errval; \ |
||
458 |
} \ |
||
459 |
} |
||
460 |
|||
461 |
✗✓ | 14 |
MISSING_ERR(sconf->rlslms, "Adaptive RLS-LMS prediction", AVERROR_PATCHWELCOME); |
462 |
|||
463 |
14 |
return error; |
|
464 |
} |
||
465 |
|||
466 |
|||
467 |
/** Parse the bs_info field to extract the block partitioning used in |
||
468 |
* block switching mode, refer to ISO/IEC 14496-3, section 11.6.2. |
||
469 |
*/ |
||
470 |
3146 |
static void parse_bs_info(const uint32_t bs_info, unsigned int n, |
|
471 |
unsigned int div, unsigned int **div_blocks, |
||
472 |
unsigned int *num_blocks) |
||
473 |
{ |
||
474 |
✓✓✓✓ |
3146 |
if (n < 31 && ((bs_info << n) & 0x40000000)) { |
475 |
// if the level is valid and the investigated bit n is set |
||
476 |
// then recursively check both children at bits (2n+1) and (2n+2) |
||
477 |
121 |
n *= 2; |
|
478 |
121 |
div += 1; |
|
479 |
121 |
parse_bs_info(bs_info, n + 1, div, div_blocks, num_blocks); |
|
480 |
121 |
parse_bs_info(bs_info, n + 2, div, div_blocks, num_blocks); |
|
481 |
} else { |
||
482 |
// else the bit is not set or the last level has been reached |
||
483 |
// (bit implicitly not set) |
||
484 |
3025 |
**div_blocks = div; |
|
485 |
3025 |
(*div_blocks)++; |
|
486 |
3025 |
(*num_blocks)++; |
|
487 |
} |
||
488 |
3146 |
} |
|
489 |
|||
490 |
|||
491 |
/** Read and decode a Rice codeword. |
||
492 |
*/ |
||
493 |
7307594 |
static int32_t decode_rice(GetBitContext *gb, unsigned int k) |
|
494 |
{ |
||
495 |
7307594 |
int max = get_bits_left(gb) - k; |
|
496 |
7307594 |
unsigned q = get_unary(gb, 0, max); |
|
497 |
✓✓ | 7307594 |
int r = k ? get_bits1(gb) : !(q & 1); |
498 |
|||
499 |
✓✓ | 7307594 |
if (k > 1) { |
500 |
7018473 |
q <<= (k - 1); |
|
501 |
7018473 |
q += get_bits_long(gb, k - 1); |
|
502 |
✓✓ | 289121 |
} else if (!k) { |
503 |
231387 |
q >>= 1; |
|
504 |
} |
||
505 |
✓✓ | 7307594 |
return r ? q : ~q; |
506 |
} |
||
507 |
|||
508 |
|||
509 |
/** Convert PARCOR coefficient k to direct filter coefficient. |
||
510 |
*/ |
||
511 |
137495 |
static void parcor_to_lpc(unsigned int k, const int32_t *par, int32_t *cof) |
|
512 |
{ |
||
513 |
int i, j; |
||
514 |
|||
515 |
✓✓ | 2584335 |
for (i = 0, j = k - 1; i < j; i++, j--) { |
516 |
2446840 |
unsigned tmp1 = ((MUL64(par[k], cof[j]) + (1 << 19)) >> 20); |
|
517 |
2446840 |
cof[j] += ((MUL64(par[k], cof[i]) + (1 << 19)) >> 20); |
|
518 |
2446840 |
cof[i] += tmp1; |
|
519 |
} |
||
520 |
✓✓ | 137495 |
if (i == j) |
521 |
68217 |
cof[i] += ((MUL64(par[k], cof[j]) + (1 << 19)) >> 20); |
|
522 |
|||
523 |
137495 |
cof[k] = par[k]; |
|
524 |
137495 |
} |
|
525 |
|||
526 |
|||
527 |
/** Read block switching field if necessary and set actual block sizes. |
||
528 |
* Also assure that the block sizes of the last frame correspond to the |
||
529 |
* actual number of samples. |
||
530 |
*/ |
||
531 |
2904 |
static void get_block_sizes(ALSDecContext *ctx, unsigned int *div_blocks, |
|
532 |
uint32_t *bs_info) |
||
533 |
{ |
||
534 |
2904 |
ALSSpecificConfig *sconf = &ctx->sconf; |
|
535 |
2904 |
GetBitContext *gb = &ctx->gb; |
|
536 |
2904 |
unsigned int *ptr_div_blocks = div_blocks; |
|
537 |
unsigned int b; |
||
538 |
|||
539 |
✓✓ | 2904 |
if (sconf->block_switching) { |
540 |
112 |
unsigned int bs_info_len = 1 << (sconf->block_switching + 2); |
|
541 |
112 |
*bs_info = get_bits_long(gb, bs_info_len); |
|
542 |
112 |
*bs_info <<= (32 - bs_info_len); |
|
543 |
} |
||
544 |
|||
545 |
2904 |
ctx->num_blocks = 0; |
|
546 |
2904 |
parse_bs_info(*bs_info, 0, 0, &ptr_div_blocks, &ctx->num_blocks); |
|
547 |
|||
548 |
// The last frame may have an overdetermined block structure given in |
||
549 |
// the bitstream. In that case the defined block structure would need |
||
550 |
// more samples than available to be consistent. |
||
551 |
// The block structure is actually used but the block sizes are adapted |
||
552 |
// to fit the actual number of available samples. |
||
553 |
// Example: 5 samples, 2nd level block sizes: 2 2 2 2. |
||
554 |
// This results in the actual block sizes: 2 2 1 0. |
||
555 |
// This is not specified in 14496-3 but actually done by the reference |
||
556 |
// codec RM22 revision 2. |
||
557 |
// This appears to happen in case of an odd number of samples in the last |
||
558 |
// frame which is actually not allowed by the block length switching part |
||
559 |
// of 14496-3. |
||
560 |
// The ALS conformance files feature an odd number of samples in the last |
||
561 |
// frame. |
||
562 |
|||
563 |
✓✓ | 5929 |
for (b = 0; b < ctx->num_blocks; b++) |
564 |
3025 |
div_blocks[b] = ctx->sconf.frame_length >> div_blocks[b]; |
|
565 |
|||
566 |
✓✓ | 2904 |
if (ctx->cur_frame_length != ctx->sconf.frame_length) { |
567 |
12 |
unsigned int remaining = ctx->cur_frame_length; |
|
568 |
|||
569 |
✓✗ | 17 |
for (b = 0; b < ctx->num_blocks; b++) { |
570 |
✓✓ | 17 |
if (remaining <= div_blocks[b]) { |
571 |
12 |
div_blocks[b] = remaining; |
|
572 |
12 |
ctx->num_blocks = b + 1; |
|
573 |
12 |
break; |
|
574 |
} |
||
575 |
|||
576 |
5 |
remaining -= div_blocks[b]; |
|
577 |
} |
||
578 |
} |
||
579 |
2904 |
} |
|
580 |
|||
581 |
|||
582 |
/** Read the block data for a constant block |
||
583 |
*/ |
||
584 |
static int read_const_block_data(ALSDecContext *ctx, ALSBlockData *bd) |
||
585 |
{ |
||
586 |
ALSSpecificConfig *sconf = &ctx->sconf; |
||
587 |
AVCodecContext *avctx = ctx->avctx; |
||
588 |
GetBitContext *gb = &ctx->gb; |
||
589 |
|||
590 |
if (bd->block_length <= 0) |
||
591 |
return AVERROR_INVALIDDATA; |
||
592 |
|||
593 |
*bd->raw_samples = 0; |
||
594 |
*bd->const_block = get_bits1(gb); // 1 = constant value, 0 = zero block (silence) |
||
595 |
bd->js_blocks = get_bits1(gb); |
||
596 |
|||
597 |
// skip 5 reserved bits |
||
598 |
skip_bits(gb, 5); |
||
599 |
|||
600 |
if (*bd->const_block) { |
||
601 |
unsigned int const_val_bits = sconf->floating ? 24 : avctx->bits_per_raw_sample; |
||
602 |
*bd->raw_samples = get_sbits_long(gb, const_val_bits); |
||
603 |
} |
||
604 |
|||
605 |
// ensure constant block decoding by reusing this field |
||
606 |
*bd->const_block = 1; |
||
607 |
|||
608 |
return 0; |
||
609 |
} |
||
610 |
|||
611 |
|||
612 |
/** Decode the block data for a constant block |
||
613 |
*/ |
||
614 |
static void decode_const_block_data(ALSDecContext *ctx, ALSBlockData *bd) |
||
615 |
{ |
||
616 |
int smp = bd->block_length - 1; |
||
617 |
int32_t val = *bd->raw_samples; |
||
618 |
int32_t *dst = bd->raw_samples + 1; |
||
619 |
|||
620 |
// write raw samples into buffer |
||
621 |
for (; smp; smp--) |
||
622 |
*dst++ = val; |
||
623 |
} |
||
624 |
|||
625 |
|||
626 |
/** Read the block data for a non-constant block |
||
627 |
*/ |
||
628 |
4767 |
static int read_var_block_data(ALSDecContext *ctx, ALSBlockData *bd) |
|
629 |
{ |
||
630 |
4767 |
ALSSpecificConfig *sconf = &ctx->sconf; |
|
631 |
4767 |
AVCodecContext *avctx = ctx->avctx; |
|
632 |
4767 |
GetBitContext *gb = &ctx->gb; |
|
633 |
unsigned int k; |
||
634 |
unsigned int s[8]; |
||
635 |
unsigned int sx[8]; |
||
636 |
unsigned int sub_blocks, log2_sub_blocks, sb_length; |
||
637 |
4767 |
unsigned int start = 0; |
|
638 |
unsigned int opt_order; |
||
639 |
int sb; |
||
640 |
4767 |
int32_t *quant_cof = bd->quant_cof; |
|
641 |
int32_t *current_res; |
||
642 |
|||
643 |
|||
644 |
// ensure variable block decoding by reusing this field |
||
645 |
4767 |
*bd->const_block = 0; |
|
646 |
|||
647 |
4767 |
*bd->opt_order = 1; |
|
648 |
4767 |
bd->js_blocks = get_bits1(gb); |
|
649 |
|||
650 |
4767 |
opt_order = *bd->opt_order; |
|
651 |
|||
652 |
// determine the number of subblocks for entropy decoding |
||
653 |
✓✓✗✓ |
4767 |
if (!sconf->bgmc && !sconf->sb_part) { |
654 |
log2_sub_blocks = 0; |
||
655 |
} else { |
||
656 |
✓✓✓✗ |
4767 |
if (sconf->bgmc && sconf->sb_part) |
657 |
1722 |
log2_sub_blocks = get_bits(gb, 2); |
|
658 |
else |
||
659 |
3045 |
log2_sub_blocks = 2 * get_bits1(gb); |
|
660 |
} |
||
661 |
|||
662 |
4767 |
sub_blocks = 1 << log2_sub_blocks; |
|
663 |
|||
664 |
// do not continue in case of a damaged stream since |
||
665 |
// block_length must be evenly divisible by sub_blocks |
||
666 |
✓✗✗✓ |
4767 |
if (bd->block_length & (sub_blocks - 1) || bd->block_length <= 0) { |
667 |
av_log(avctx, AV_LOG_WARNING, |
||
668 |
"Block length is not evenly divisible by the number of subblocks.\n"); |
||
669 |
return AVERROR_INVALIDDATA; |
||
670 |
} |
||
671 |
|||
672 |
4767 |
sb_length = bd->block_length >> log2_sub_blocks; |
|
673 |
|||
674 |
✓✓ | 4767 |
if (sconf->bgmc) { |
675 |
✗✓ | 1722 |
s[0] = get_bits(gb, 8 + (sconf->resolution > 1)); |
676 |
✓✓ | 3148 |
for (k = 1; k < sub_blocks; k++) |
677 |
1426 |
s[k] = s[k - 1] + decode_rice(gb, 2); |
|
678 |
|||
679 |
✓✓ | 4870 |
for (k = 0; k < sub_blocks; k++) { |
680 |
3148 |
sx[k] = s[k] & 0x0F; |
|
681 |
3148 |
s [k] >>= 4; |
|
682 |
} |
||
683 |
} else { |
||
684 |
✗✓ | 3045 |
s[0] = get_bits(gb, 4 + (sconf->resolution > 1)); |
685 |
✓✓ | 5325 |
for (k = 1; k < sub_blocks; k++) |
686 |
2280 |
s[k] = s[k - 1] + decode_rice(gb, 0); |
|
687 |
} |
||
688 |
✓✓ | 8473 |
for (k = 1; k < sub_blocks; k++) |
689 |
✗✓ | 3706 |
if (s[k] > 32) { |
690 |
av_log(avctx, AV_LOG_ERROR, "k invalid for rice code.\n"); |
||
691 |
return AVERROR_INVALIDDATA; |
||
692 |
} |
||
693 |
|||
694 |
✗✓ | 4767 |
if (get_bits1(gb)) |
695 |
*bd->shift_lsbs = get_bits(gb, 4) + 1; |
||
696 |
|||
697 |
✓✓✗✓ ✗✓ |
4767 |
*bd->store_prev_samples = (bd->js_blocks && bd->raw_other) || *bd->shift_lsbs; |
698 |
|||
699 |
|||
700 |
✓✗ | 4767 |
if (!sconf->rlslms) { |
701 |
✓✓✓✗ |
6742 |
if (sconf->adapt_order && sconf->max_order) { |
702 |
1975 |
int opt_order_length = av_ceil_log2(av_clip((bd->block_length >> 3) - 1, |
|
703 |
1975 |
2, sconf->max_order + 1)); |
|
704 |
1975 |
*bd->opt_order = get_bits(gb, opt_order_length); |
|
705 |
✗✓ | 1975 |
if (*bd->opt_order > sconf->max_order) { |
706 |
*bd->opt_order = sconf->max_order; |
||
707 |
av_log(avctx, AV_LOG_ERROR, "Predictor order too large.\n"); |
||
708 |
return AVERROR_INVALIDDATA; |
||
709 |
} |
||
710 |
} else { |
||
711 |
2792 |
*bd->opt_order = sconf->max_order; |
|
712 |
} |
||
713 |
4767 |
opt_order = *bd->opt_order; |
|
714 |
|||
715 |
✓✗ | 4767 |
if (opt_order) { |
716 |
int add_base; |
||
717 |
|||
718 |
✗✓ | 4767 |
if (sconf->coef_table == 3) { |
719 |
add_base = 0x7F; |
||
720 |
|||
721 |
// read coefficient 0 |
||
722 |
quant_cof[0] = 32 * parcor_scaled_values[get_bits(gb, 7)]; |
||
723 |
|||
724 |
// read coefficient 1 |
||
725 |
if (opt_order > 1) |
||
726 |
quant_cof[1] = -32 * parcor_scaled_values[get_bits(gb, 7)]; |
||
727 |
|||
728 |
// read coefficients 2 to opt_order |
||
729 |
for (k = 2; k < opt_order; k++) |
||
730 |
quant_cof[k] = get_bits(gb, 7); |
||
731 |
} else { |
||
732 |
int k_max; |
||
733 |
4767 |
add_base = 1; |
|
734 |
|||
735 |
// read coefficient 0 to 19 |
||
736 |
4767 |
k_max = FFMIN(opt_order, 20); |
|
737 |
✓✓ | 70514 |
for (k = 0; k < k_max; k++) { |
738 |
65747 |
int rice_param = parcor_rice_table[sconf->coef_table][k][1]; |
|
739 |
65747 |
int offset = parcor_rice_table[sconf->coef_table][k][0]; |
|
740 |
65747 |
quant_cof[k] = decode_rice(gb, rice_param) + offset; |
|
741 |
✓✗✗✓ |
65747 |
if (quant_cof[k] < -64 || quant_cof[k] > 63) { |
742 |
av_log(avctx, AV_LOG_ERROR, |
||
743 |
"quant_cof %"PRId32" is out of range.\n", |
||
744 |
quant_cof[k]); |
||
745 |
return AVERROR_INVALIDDATA; |
||
746 |
} |
||
747 |
} |
||
748 |
|||
749 |
// read coefficients 20 to 126 |
||
750 |
4767 |
k_max = FFMIN(opt_order, 127); |
|
751 |
✓✓ | 75239 |
for (; k < k_max; k++) |
752 |
70472 |
quant_cof[k] = decode_rice(gb, 2) + (k & 1); |
|
753 |
|||
754 |
// read coefficients 127 to opt_order |
||
755 |
✓✓ | 6043 |
for (; k < opt_order; k++) |
756 |
1276 |
quant_cof[k] = decode_rice(gb, 1); |
|
757 |
|||
758 |
4767 |
quant_cof[0] = 32 * parcor_scaled_values[quant_cof[0] + 64]; |
|
759 |
|||
760 |
✓✗ | 4767 |
if (opt_order > 1) |
761 |
4767 |
quant_cof[1] = -32 * parcor_scaled_values[quant_cof[1] + 64]; |
|
762 |
} |
||
763 |
|||
764 |
✓✓ | 132728 |
for (k = 2; k < opt_order; k++) |
765 |
127961 |
quant_cof[k] = (quant_cof[k] * (1U << 14)) + (add_base << 13); |
|
766 |
} |
||
767 |
} |
||
768 |
|||
769 |
// read LTP gain and lag values |
||
770 |
✓✓ | 4767 |
if (sconf->long_term_prediction) { |
771 |
1722 |
*bd->use_ltp = get_bits1(gb); |
|
772 |
|||
773 |
✓✓ | 1722 |
if (*bd->use_ltp) { |
774 |
int r, c; |
||
775 |
|||
776 |
1558 |
bd->ltp_gain[0] = decode_rice(gb, 1) * 8; |
|
777 |
1558 |
bd->ltp_gain[1] = decode_rice(gb, 2) * 8; |
|
778 |
|||
779 |
1558 |
r = get_unary(gb, 0, 4); |
|
780 |
1558 |
c = get_bits(gb, 2); |
|
781 |
✗✓ | 1558 |
if (r >= 4) { |
782 |
av_log(avctx, AV_LOG_ERROR, "r overflow\n"); |
||
783 |
return AVERROR_INVALIDDATA; |
||
784 |
} |
||
785 |
|||
786 |
1558 |
bd->ltp_gain[2] = ltp_gain_values[r][c]; |
|
787 |
|||
788 |
1558 |
bd->ltp_gain[3] = decode_rice(gb, 2) * 8; |
|
789 |
1558 |
bd->ltp_gain[4] = decode_rice(gb, 1) * 8; |
|
790 |
|||
791 |
1558 |
*bd->ltp_lag = get_bits(gb, ctx->ltp_lag_length); |
|
792 |
1558 |
*bd->ltp_lag += FFMAX(4, opt_order + 1); |
|
793 |
} |
||
794 |
} |
||
795 |
|||
796 |
// read first value and residuals in case of a random access block |
||
797 |
✓✓ | 4767 |
if (bd->ra_block) { |
798 |
698 |
start = FFMIN(opt_order, 3); |
|
799 |
✗✓ | 698 |
av_assert0(sb_length <= sconf->frame_length); |
800 |
✗✓ | 698 |
if (sb_length <= start) { |
801 |
// opt_order or sb_length may be corrupted, either way this is unsupported and not well defined in the specification |
||
802 |
av_log(avctx, AV_LOG_ERROR, "Sub block length smaller or equal start\n"); |
||
803 |
return AVERROR_PATCHWELCOME; |
||
804 |
} |
||
805 |
|||
806 |
✓✗ | 698 |
if (opt_order) |
807 |
698 |
bd->raw_samples[0] = decode_rice(gb, avctx->bits_per_raw_sample - 4); |
|
808 |
✓✗ | 698 |
if (opt_order > 1) |
809 |
698 |
bd->raw_samples[1] = decode_rice(gb, FFMIN(s[0] + 3, ctx->s_max)); |
|
810 |
✓✓ | 698 |
if (opt_order > 2) |
811 |
697 |
bd->raw_samples[2] = decode_rice(gb, FFMIN(s[0] + 1, ctx->s_max)); |
|
812 |
} |
||
813 |
|||
814 |
// read all residuals |
||
815 |
✓✓ | 4767 |
if (sconf->bgmc) { |
816 |
int delta[8]; |
||
817 |
unsigned int k [8]; |
||
818 |
1722 |
unsigned int b = av_clip((av_ceil_log2(bd->block_length) - 3) >> 1, 0, 5); |
|
819 |
|||
820 |
// read most significant bits |
||
821 |
unsigned int high; |
||
822 |
unsigned int low; |
||
823 |
unsigned int value; |
||
824 |
|||
825 |
1722 |
int ret = ff_bgmc_decode_init(gb, &high, &low, &value); |
|
826 |
✗✓ | 1722 |
if (ret < 0) |
827 |
return ret; |
||
828 |
|||
829 |
1722 |
current_res = bd->raw_samples + start; |
|
830 |
|||
831 |
✓✓ | 4870 |
for (sb = 0; sb < sub_blocks; sb++) { |
832 |
✓✓ | 3148 |
unsigned int sb_len = sb_length - (sb ? 0 : start); |
833 |
|||
834 |
✓✓ | 3148 |
k [sb] = s[sb] > b ? s[sb] - b : 0; |
835 |
3148 |
delta[sb] = 5 - s[sb] + k[sb]; |
|
836 |
|||
837 |
✗✓ | 3148 |
if (k[sb] >= 32) |
838 |
return AVERROR_INVALIDDATA; |
||
839 |
|||
840 |
3148 |
ff_bgmc_decode(gb, sb_len, current_res, |
|
841 |
delta[sb], sx[sb], &high, &low, &value, ctx->bgmc_lut, ctx->bgmc_lut_status); |
||
842 |
|||
843 |
3148 |
current_res += sb_len; |
|
844 |
} |
||
845 |
|||
846 |
1722 |
ff_bgmc_decode_end(gb); |
|
847 |
|||
848 |
|||
849 |
// read least significant bits and tails |
||
850 |
1722 |
current_res = bd->raw_samples + start; |
|
851 |
|||
852 |
✓✓ | 4870 |
for (sb = 0; sb < sub_blocks; sb++, start = 0) { |
853 |
3148 |
unsigned int cur_tail_code = tail_code[sx[sb]][delta[sb]]; |
|
854 |
3148 |
unsigned int cur_k = k[sb]; |
|
855 |
3148 |
unsigned int cur_s = s[sb]; |
|
856 |
|||
857 |
✓✓ | 4584006 |
for (; start < sb_length; start++) { |
858 |
4580858 |
int32_t res = *current_res; |
|
859 |
|||
860 |
✓✓ | 4580858 |
if (res == cur_tail_code) { |
861 |
✓✓ | 12582 |
unsigned int max_msb = (2 + (sx[sb] > 2) + (sx[sb] > 10)) |
862 |
12582 |
<< (5 - delta[sb]); |
|
863 |
|||
864 |
12582 |
res = decode_rice(gb, cur_s); |
|
865 |
|||
866 |
✓✓ | 12582 |
if (res >= 0) { |
867 |
6332 |
res += (max_msb ) << cur_k; |
|
868 |
} else { |
||
869 |
6250 |
res -= (max_msb - 1) << cur_k; |
|
870 |
} |
||
871 |
} else { |
||
872 |
✓✓ | 4568276 |
if (res > cur_tail_code) |
873 |
94057 |
res--; |
|
874 |
|||
875 |
✓✓ | 4568276 |
if (res & 1) |
876 |
2023961 |
res = -res; |
|
877 |
|||
878 |
4568276 |
res >>= 1; |
|
879 |
|||
880 |
✓✓ | 4568276 |
if (cur_k) { |
881 |
866509 |
res *= 1U << cur_k; |
|
882 |
866509 |
res |= get_bits_long(gb, cur_k); |
|
883 |
} |
||
884 |
} |
||
885 |
|||
886 |
4580858 |
*current_res++ = res; |
|
887 |
} |
||
888 |
} |
||
889 |
} else { |
||
890 |
3045 |
current_res = bd->raw_samples + start; |
|
891 |
|||
892 |
✓✓ | 8370 |
for (sb = 0; sb < sub_blocks; sb++, start = 0) |
893 |
✓✓ | 7145090 |
for (; start < sb_length; start++) |
894 |
7139765 |
*current_res++ = decode_rice(gb, s[sb]); |
|
895 |
} |
||
896 |
|||
897 |
4767 |
return 0; |
|
898 |
} |
||
899 |
|||
900 |
|||
901 |
/** Decode the block data for a non-constant block |
||
902 |
*/ |
||
903 |
4767 |
static int decode_var_block_data(ALSDecContext *ctx, ALSBlockData *bd) |
|
904 |
{ |
||
905 |
4767 |
ALSSpecificConfig *sconf = &ctx->sconf; |
|
906 |
4767 |
unsigned int block_length = bd->block_length; |
|
907 |
4767 |
unsigned int smp = 0; |
|
908 |
unsigned int k; |
||
909 |
4767 |
int opt_order = *bd->opt_order; |
|
910 |
int sb; |
||
911 |
int64_t y; |
||
912 |
4767 |
int32_t *quant_cof = bd->quant_cof; |
|
913 |
4767 |
int32_t *lpc_cof = bd->lpc_cof; |
|
914 |
4767 |
int32_t *raw_samples = bd->raw_samples; |
|
915 |
4767 |
int32_t *raw_samples_end = bd->raw_samples + bd->block_length; |
|
916 |
4767 |
int32_t *lpc_cof_reversed = ctx->lpc_cof_reversed_buffer; |
|
917 |
|||
918 |
// reverse long-term prediction |
||
919 |
✓✓ | 4767 |
if (*bd->use_ltp) { |
920 |
int ltp_smp; |
||
921 |
|||
922 |
✓✓ | 3839287 |
for (ltp_smp = FFMAX(*bd->ltp_lag - 2, 0); ltp_smp < block_length; ltp_smp++) { |
923 |
3837729 |
int center = ltp_smp - *bd->ltp_lag; |
|
924 |
3837729 |
int begin = FFMAX(0, center - 2); |
|
925 |
3837729 |
int end = center + 3; |
|
926 |
3837729 |
int tab = 5 - (end - begin); |
|
927 |
int base; |
||
928 |
|||
929 |
3837729 |
y = 1 << 6; |
|
930 |
|||
931 |
✓✓ | 23010794 |
for (base = begin; base < end; base++, tab++) |
932 |
19173065 |
y += (uint64_t)MUL64(bd->ltp_gain[tab], raw_samples[base]); |
|
933 |
|||
934 |
3837729 |
raw_samples[ltp_smp] += y >> 7; |
|
935 |
} |
||
936 |
} |
||
937 |
|||
938 |
// reconstruct all samples from residuals |
||
939 |
✓✓ | 4767 |
if (bd->ra_block) { |
940 |
✓✓ | 53993 |
for (smp = 0; smp < FFMIN(opt_order, block_length); smp++) { |
941 |
53295 |
y = 1 << 19; |
|
942 |
|||
943 |
✓✓ | 2692325 |
for (sb = 0; sb < smp; sb++) |
944 |
2639030 |
y += (uint64_t)MUL64(lpc_cof[sb], raw_samples[-(sb + 1)]); |
|
945 |
|||
946 |
53295 |
*raw_samples++ -= y >> 20; |
|
947 |
53295 |
parcor_to_lpc(smp, quant_cof, lpc_cof); |
|
948 |
} |
||
949 |
} else { |
||
950 |
✓✓ | 88269 |
for (k = 0; k < opt_order; k++) |
951 |
84200 |
parcor_to_lpc(k, quant_cof, lpc_cof); |
|
952 |
|||
953 |
// store previous samples in case that they have to be altered |
||
954 |
✓✓ | 4069 |
if (*bd->store_prev_samples) |
955 |
9 |
memcpy(bd->prev_raw_samples, raw_samples - sconf->max_order, |
|
956 |
9 |
sizeof(*bd->prev_raw_samples) * sconf->max_order); |
|
957 |
|||
958 |
// reconstruct difference signal for prediction (joint-stereo) |
||
959 |
✓✓✓✗ |
4069 |
if (bd->js_blocks && bd->raw_other) { |
960 |
uint32_t *left, *right; |
||
961 |
|||
962 |
✓✓ | 9 |
if (bd->raw_other > raw_samples) { // D = R - L |
963 |
4 |
left = raw_samples; |
|
964 |
4 |
right = bd->raw_other; |
|
965 |
} else { // D = R - L |
||
966 |
5 |
left = bd->raw_other; |
|
967 |
5 |
right = raw_samples; |
|
968 |
} |
||
969 |
|||
970 |
✓✓ | 333 |
for (sb = -1; sb >= -sconf->max_order; sb--) |
971 |
324 |
raw_samples[sb] = right[sb] - left[sb]; |
|
972 |
} |
||
973 |
|||
974 |
// reconstruct shifted signal |
||
975 |
✗✓ | 4069 |
if (*bd->shift_lsbs) |
976 |
for (sb = -1; sb >= -sconf->max_order; sb--) |
||
977 |
raw_samples[sb] >>= *bd->shift_lsbs; |
||
978 |
} |
||
979 |
|||
980 |
// reverse linear prediction coefficients for efficiency |
||
981 |
4767 |
lpc_cof = lpc_cof + opt_order; |
|
982 |
|||
983 |
✓✓ | 142262 |
for (sb = 0; sb < opt_order; sb++) |
984 |
137495 |
lpc_cof_reversed[sb] = lpc_cof[-(sb + 1)]; |
|
985 |
|||
986 |
// reconstruct raw samples |
||
987 |
4767 |
raw_samples = bd->raw_samples + smp; |
|
988 |
4767 |
lpc_cof = lpc_cof_reversed + opt_order; |
|
989 |
|||
990 |
✓✓ | 11674188 |
for (; raw_samples < raw_samples_end; raw_samples++) { |
991 |
11669421 |
y = 1 << 19; |
|
992 |
|||
993 |
✓✓ | 429242414 |
for (sb = -opt_order; sb < 0; sb++) |
994 |
417572993 |
y += (uint64_t)MUL64(lpc_cof[sb], raw_samples[sb]); |
|
995 |
|||
996 |
11669421 |
*raw_samples -= y >> 20; |
|
997 |
} |
||
998 |
|||
999 |
4767 |
raw_samples = bd->raw_samples; |
|
1000 |
|||
1001 |
// restore previous samples in case that they have been altered |
||
1002 |
✓✓ | 4767 |
if (*bd->store_prev_samples) |
1003 |
9 |
memcpy(raw_samples - sconf->max_order, bd->prev_raw_samples, |
|
1004 |
9 |
sizeof(*raw_samples) * sconf->max_order); |
|
1005 |
|||
1006 |
4767 |
return 0; |
|
1007 |
} |
||
1008 |
|||
1009 |
|||
1010 |
/** Read the block data. |
||
1011 |
*/ |
||
1012 |
4767 |
static int read_block(ALSDecContext *ctx, ALSBlockData *bd) |
|
1013 |
{ |
||
1014 |
int ret; |
||
1015 |
4767 |
GetBitContext *gb = &ctx->gb; |
|
1016 |
4767 |
ALSSpecificConfig *sconf = &ctx->sconf; |
|
1017 |
|||
1018 |
4767 |
*bd->shift_lsbs = 0; |
|
1019 |
// read block type flag and read the samples accordingly |
||
1020 |
✓✗ | 4767 |
if (get_bits1(gb)) { |
1021 |
4767 |
ret = read_var_block_data(ctx, bd); |
|
1022 |
} else { |
||
1023 |
ret = read_const_block_data(ctx, bd); |
||
1024 |
} |
||
1025 |
|||
1026 |
✓✓✗✓ |
4767 |
if (!sconf->mc_coding || ctx->js_switch) |
1027 |
3045 |
align_get_bits(gb); |
|
1028 |
|||
1029 |
4767 |
return ret; |
|
1030 |
} |
||
1031 |
|||
1032 |
|||
1033 |
/** Decode the block data. |
||
1034 |
*/ |
||
1035 |
4767 |
static int decode_block(ALSDecContext *ctx, ALSBlockData *bd) |
|
1036 |
{ |
||
1037 |
unsigned int smp; |
||
1038 |
4767 |
int ret = 0; |
|
1039 |
|||
1040 |
// read block type flag and read the samples accordingly |
||
1041 |
✗✓ | 4767 |
if (*bd->const_block) |
1042 |
decode_const_block_data(ctx, bd); |
||
1043 |
else |
||
1044 |
4767 |
ret = decode_var_block_data(ctx, bd); // always return 0 |
|
1045 |
|||
1046 |
✗✓ | 4767 |
if (ret < 0) |
1047 |
return ret; |
||
1048 |
|||
1049 |
// TODO: read RLSLMS extension data |
||
1050 |
|||
1051 |
✗✓ | 4767 |
if (*bd->shift_lsbs) |
1052 |
for (smp = 0; smp < bd->block_length; smp++) |
||
1053 |
bd->raw_samples[smp] = (unsigned)bd->raw_samples[smp] << *bd->shift_lsbs; |
||
1054 |
|||
1055 |
4767 |
return 0; |
|
1056 |
} |
||
1057 |
|||
1058 |
|||
1059 |
/** Read and decode block data successively. |
||
1060 |
*/ |
||
1061 |
3045 |
static int read_decode_block(ALSDecContext *ctx, ALSBlockData *bd) |
|
1062 |
{ |
||
1063 |
int ret; |
||
1064 |
|||
1065 |
✗✓ | 3045 |
if ((ret = read_block(ctx, bd)) < 0) |
1066 |
return ret; |
||
1067 |
|||
1068 |
3045 |
return decode_block(ctx, bd); |
|
1069 |
} |
||
1070 |
|||
1071 |
|||
1072 |
/** Compute the number of samples left to decode for the current frame and |
||
1073 |
* sets these samples to zero. |
||
1074 |
*/ |
||
1075 |
static void zero_remaining(unsigned int b, unsigned int b_max, |
||
1076 |
const unsigned int *div_blocks, int32_t *buf) |
||
1077 |
{ |
||
1078 |
unsigned int count = 0; |
||
1079 |
|||
1080 |
while (b < b_max) |
||
1081 |
count += div_blocks[b++]; |
||
1082 |
|||
1083 |
if (count) |
||
1084 |
memset(buf, 0, sizeof(*buf) * count); |
||
1085 |
} |
||
1086 |
|||
1087 |
|||
1088 |
/** Decode blocks independently. |
||
1089 |
*/ |
||
1090 |
2138 |
static int decode_blocks_ind(ALSDecContext *ctx, unsigned int ra_frame, |
|
1091 |
unsigned int c, const unsigned int *div_blocks, |
||
1092 |
unsigned int *js_blocks) |
||
1093 |
{ |
||
1094 |
int ret; |
||
1095 |
unsigned int b; |
||
1096 |
2138 |
ALSBlockData bd = { 0 }; |
|
1097 |
|||
1098 |
2138 |
bd.ra_block = ra_frame; |
|
1099 |
2138 |
bd.const_block = ctx->const_block; |
|
1100 |
2138 |
bd.shift_lsbs = ctx->shift_lsbs; |
|
1101 |
2138 |
bd.opt_order = ctx->opt_order; |
|
1102 |
2138 |
bd.store_prev_samples = ctx->store_prev_samples; |
|
1103 |
2138 |
bd.use_ltp = ctx->use_ltp; |
|
1104 |
2138 |
bd.ltp_lag = ctx->ltp_lag; |
|
1105 |
2138 |
bd.ltp_gain = ctx->ltp_gain[0]; |
|
1106 |
2138 |
bd.quant_cof = ctx->quant_cof[0]; |
|
1107 |
2138 |
bd.lpc_cof = ctx->lpc_cof[0]; |
|
1108 |
2138 |
bd.prev_raw_samples = ctx->prev_raw_samples; |
|
1109 |
2138 |
bd.raw_samples = ctx->raw_samples[c]; |
|
1110 |
|||
1111 |
|||
1112 |
✓✓ | 4317 |
for (b = 0; b < ctx->num_blocks; b++) { |
1113 |
2179 |
bd.block_length = div_blocks[b]; |
|
1114 |
|||
1115 |
✗✓ | 2179 |
if ((ret = read_decode_block(ctx, &bd)) < 0) { |
1116 |
// damaged block, write zero for the rest of the frame |
||
1117 |
zero_remaining(b, ctx->num_blocks, div_blocks, bd.raw_samples); |
||
1118 |
return ret; |
||
1119 |
} |
||
1120 |
2179 |
bd.raw_samples += div_blocks[b]; |
|
1121 |
2179 |
bd.ra_block = 0; |
|
1122 |
} |
||
1123 |
|||
1124 |
2138 |
return 0; |
|
1125 |
} |
||
1126 |
|||
1127 |
|||
1128 |
/** Decode blocks dependently. |
||
1129 |
*/ |
||
1130 |
415 |
static int decode_blocks(ALSDecContext *ctx, unsigned int ra_frame, |
|
1131 |
unsigned int c, const unsigned int *div_blocks, |
||
1132 |
unsigned int *js_blocks) |
||
1133 |
{ |
||
1134 |
415 |
ALSSpecificConfig *sconf = &ctx->sconf; |
|
1135 |
415 |
unsigned int offset = 0; |
|
1136 |
unsigned int b; |
||
1137 |
int ret; |
||
1138 |
415 |
ALSBlockData bd[2] = { { 0 } }; |
|
1139 |
|||
1140 |
415 |
bd[0].ra_block = ra_frame; |
|
1141 |
415 |
bd[0].const_block = ctx->const_block; |
|
1142 |
415 |
bd[0].shift_lsbs = ctx->shift_lsbs; |
|
1143 |
415 |
bd[0].opt_order = ctx->opt_order; |
|
1144 |
415 |
bd[0].store_prev_samples = ctx->store_prev_samples; |
|
1145 |
415 |
bd[0].use_ltp = ctx->use_ltp; |
|
1146 |
415 |
bd[0].ltp_lag = ctx->ltp_lag; |
|
1147 |
415 |
bd[0].ltp_gain = ctx->ltp_gain[0]; |
|
1148 |
415 |
bd[0].quant_cof = ctx->quant_cof[0]; |
|
1149 |
415 |
bd[0].lpc_cof = ctx->lpc_cof[0]; |
|
1150 |
415 |
bd[0].prev_raw_samples = ctx->prev_raw_samples; |
|
1151 |
415 |
bd[0].js_blocks = *js_blocks; |
|
1152 |
|||
1153 |
415 |
bd[1].ra_block = ra_frame; |
|
1154 |
415 |
bd[1].const_block = ctx->const_block; |
|
1155 |
415 |
bd[1].shift_lsbs = ctx->shift_lsbs; |
|
1156 |
415 |
bd[1].opt_order = ctx->opt_order; |
|
1157 |
415 |
bd[1].store_prev_samples = ctx->store_prev_samples; |
|
1158 |
415 |
bd[1].use_ltp = ctx->use_ltp; |
|
1159 |
415 |
bd[1].ltp_lag = ctx->ltp_lag; |
|
1160 |
415 |
bd[1].ltp_gain = ctx->ltp_gain[0]; |
|
1161 |
415 |
bd[1].quant_cof = ctx->quant_cof[0]; |
|
1162 |
415 |
bd[1].lpc_cof = ctx->lpc_cof[0]; |
|
1163 |
415 |
bd[1].prev_raw_samples = ctx->prev_raw_samples; |
|
1164 |
415 |
bd[1].js_blocks = *(js_blocks + 1); |
|
1165 |
|||
1166 |
// decode all blocks |
||
1167 |
✓✓ | 848 |
for (b = 0; b < ctx->num_blocks; b++) { |
1168 |
unsigned int s; |
||
1169 |
|||
1170 |
433 |
bd[0].block_length = div_blocks[b]; |
|
1171 |
433 |
bd[1].block_length = div_blocks[b]; |
|
1172 |
|||
1173 |
433 |
bd[0].raw_samples = ctx->raw_samples[c ] + offset; |
|
1174 |
433 |
bd[1].raw_samples = ctx->raw_samples[c + 1] + offset; |
|
1175 |
|||
1176 |
433 |
bd[0].raw_other = bd[1].raw_samples; |
|
1177 |
433 |
bd[1].raw_other = bd[0].raw_samples; |
|
1178 |
|||
1179 |
✓✗✗✓ |
866 |
if ((ret = read_decode_block(ctx, &bd[0])) < 0 || |
1180 |
433 |
(ret = read_decode_block(ctx, &bd[1])) < 0) |
|
1181 |
goto fail; |
||
1182 |
|||
1183 |
// reconstruct joint-stereo blocks |
||
1184 |
✓✓ | 433 |
if (bd[0].js_blocks) { |
1185 |
✗✓ | 4 |
if (bd[1].js_blocks) |
1186 |
av_log(ctx->avctx, AV_LOG_WARNING, "Invalid channel pair.\n"); |
||
1187 |
|||
1188 |
✓✓ | 16388 |
for (s = 0; s < div_blocks[b]; s++) |
1189 |
16384 |
bd[0].raw_samples[s] = bd[1].raw_samples[s] - (unsigned)bd[0].raw_samples[s]; |
|
1190 |
✓✓ | 429 |
} else if (bd[1].js_blocks) { |
1191 |
✓✓ | 10245 |
for (s = 0; s < div_blocks[b]; s++) |
1192 |
10240 |
bd[1].raw_samples[s] = bd[1].raw_samples[s] + (unsigned)bd[0].raw_samples[s]; |
|
1193 |
} |
||
1194 |
|||
1195 |
433 |
offset += div_blocks[b]; |
|
1196 |
433 |
bd[0].ra_block = 0; |
|
1197 |
433 |
bd[1].ra_block = 0; |
|
1198 |
} |
||
1199 |
|||
1200 |
// store carryover raw samples, |
||
1201 |
// the others channel raw samples are stored by the calling function. |
||
1202 |
415 |
memmove(ctx->raw_samples[c] - sconf->max_order, |
|
1203 |
415 |
ctx->raw_samples[c] - sconf->max_order + sconf->frame_length, |
|
1204 |
415 |
sizeof(*ctx->raw_samples[c]) * sconf->max_order); |
|
1205 |
|||
1206 |
415 |
return 0; |
|
1207 |
fail: |
||
1208 |
// damaged block, write zero for the rest of the frame |
||
1209 |
zero_remaining(b, ctx->num_blocks, div_blocks, bd[0].raw_samples); |
||
1210 |
zero_remaining(b, ctx->num_blocks, div_blocks, bd[1].raw_samples); |
||
1211 |
return ret; |
||
1212 |
} |
||
1213 |
|||
1214 |
5721 |
static inline int als_weighting(GetBitContext *gb, int k, int off) |
|
1215 |
{ |
||
1216 |
5721 |
int idx = av_clip(decode_rice(gb, k) + off, |
|
1217 |
0, FF_ARRAY_ELEMS(mcc_weightings) - 1); |
||
1218 |
5721 |
return mcc_weightings[idx]; |
|
1219 |
} |
||
1220 |
|||
1221 |
/** Read the channel data. |
||
1222 |
*/ |
||
1223 |
1722 |
static int read_channel_data(ALSDecContext *ctx, ALSChannelData *cd, int c) |
|
1224 |
{ |
||
1225 |
1722 |
GetBitContext *gb = &ctx->gb; |
|
1226 |
1722 |
ALSChannelData *current = cd; |
|
1227 |
1722 |
unsigned int channels = ctx->avctx->channels; |
|
1228 |
1722 |
int entries = 0; |
|
1229 |
|||
1230 |
✓✗✓✓ |
2948 |
while (entries < channels && !(current->stop_flag = get_bits1(gb))) { |
1231 |
1226 |
current->master_channel = get_bits_long(gb, av_ceil_log2(channels)); |
|
1232 |
|||
1233 |
✗✓ | 1226 |
if (current->master_channel >= channels) { |
1234 |
av_log(ctx->avctx, AV_LOG_ERROR, "Invalid master channel.\n"); |
||
1235 |
return AVERROR_INVALIDDATA; |
||
1236 |
} |
||
1237 |
|||
1238 |
✓✗ | 1226 |
if (current->master_channel != c) { |
1239 |
1226 |
current->time_diff_flag = get_bits1(gb); |
|
1240 |
1226 |
current->weighting[0] = als_weighting(gb, 1, 16); |
|
1241 |
1226 |
current->weighting[1] = als_weighting(gb, 2, 14); |
|
1242 |
1226 |
current->weighting[2] = als_weighting(gb, 1, 16); |
|
1243 |
|||
1244 |
✓✓ | 1226 |
if (current->time_diff_flag) { |
1245 |
681 |
current->weighting[3] = als_weighting(gb, 1, 16); |
|
1246 |
681 |
current->weighting[4] = als_weighting(gb, 1, 16); |
|
1247 |
681 |
current->weighting[5] = als_weighting(gb, 1, 16); |
|
1248 |
|||
1249 |
681 |
current->time_diff_sign = get_bits1(gb); |
|
1250 |
681 |
current->time_diff_index = get_bits(gb, ctx->ltp_lag_length - 3) + 3; |
|
1251 |
} |
||
1252 |
} |
||
1253 |
|||
1254 |
1226 |
current++; |
|
1255 |
1226 |
entries++; |
|
1256 |
} |
||
1257 |
|||
1258 |
✗✓ | 1722 |
if (entries == channels) { |
1259 |
av_log(ctx->avctx, AV_LOG_ERROR, "Damaged channel data.\n"); |
||
1260 |
return AVERROR_INVALIDDATA; |
||
1261 |
} |
||
1262 |
|||
1263 |
1722 |
align_get_bits(gb); |
|
1264 |
1722 |
return 0; |
|
1265 |
} |
||
1266 |
|||
1267 |
|||
1268 |
/** Recursively reverts the inter-channel correlation for a block. |
||
1269 |
*/ |
||
1270 |
2948 |
static int revert_channel_correlation(ALSDecContext *ctx, ALSBlockData *bd, |
|
1271 |
ALSChannelData **cd, int *reverted, |
||
1272 |
unsigned int offset, int c) |
||
1273 |
{ |
||
1274 |
2948 |
ALSChannelData *ch = cd[c]; |
|
1275 |
2948 |
unsigned int dep = 0; |
|
1276 |
2948 |
unsigned int channels = ctx->avctx->channels; |
|
1277 |
2948 |
unsigned int channel_size = ctx->sconf.frame_length + ctx->sconf.max_order; |
|
1278 |
|||
1279 |
✓✓ | 2948 |
if (reverted[c]) |
1280 |
1226 |
return 0; |
|
1281 |
|||
1282 |
1722 |
reverted[c] = 1; |
|
1283 |
|||
1284 |
✓✗✓✓ |
2948 |
while (dep < channels && !ch[dep].stop_flag) { |
1285 |
1226 |
revert_channel_correlation(ctx, bd, cd, reverted, offset, |
|
1286 |
1226 |
ch[dep].master_channel); |
|
1287 |
|||
1288 |
1226 |
dep++; |
|
1289 |
} |
||
1290 |
|||
1291 |
✗✓ | 1722 |
if (dep == channels) { |
1292 |
av_log(ctx->avctx, AV_LOG_WARNING, "Invalid channel correlation.\n"); |
||
1293 |
return AVERROR_INVALIDDATA; |
||
1294 |
} |
||
1295 |
|||
1296 |
1722 |
bd->const_block = ctx->const_block + c; |
|
1297 |
1722 |
bd->shift_lsbs = ctx->shift_lsbs + c; |
|
1298 |
1722 |
bd->opt_order = ctx->opt_order + c; |
|
1299 |
1722 |
bd->store_prev_samples = ctx->store_prev_samples + c; |
|
1300 |
1722 |
bd->use_ltp = ctx->use_ltp + c; |
|
1301 |
1722 |
bd->ltp_lag = ctx->ltp_lag + c; |
|
1302 |
1722 |
bd->ltp_gain = ctx->ltp_gain[c]; |
|
1303 |
1722 |
bd->lpc_cof = ctx->lpc_cof[c]; |
|
1304 |
1722 |
bd->quant_cof = ctx->quant_cof[c]; |
|
1305 |
1722 |
bd->raw_samples = ctx->raw_samples[c] + offset; |
|
1306 |
|||
1307 |
✓✓ | 2948 |
for (dep = 0; !ch[dep].stop_flag; dep++) { |
1308 |
ptrdiff_t smp; |
||
1309 |
1226 |
ptrdiff_t begin = 1; |
|
1310 |
1226 |
ptrdiff_t end = bd->block_length - 1; |
|
1311 |
int64_t y; |
||
1312 |
1226 |
int32_t *master = ctx->raw_samples[ch[dep].master_channel] + offset; |
|
1313 |
|||
1314 |
✗✓ | 1226 |
if (ch[dep].master_channel == c) |
1315 |
continue; |
||
1316 |
|||
1317 |
✓✓ | 1226 |
if (ch[dep].time_diff_flag) { |
1318 |
681 |
int t = ch[dep].time_diff_index; |
|
1319 |
|||
1320 |
✓✓ | 681 |
if (ch[dep].time_diff_sign) { |
1321 |
313 |
t = -t; |
|
1322 |
✗✓ | 313 |
if (begin < t) { |
1323 |
av_log(ctx->avctx, AV_LOG_ERROR, "begin %"PTRDIFF_SPECIFIER" smaller than time diff index %d.\n", begin, t); |
||
1324 |
return AVERROR_INVALIDDATA; |
||
1325 |
} |
||
1326 |
313 |
begin -= t; |
|
1327 |
} else { |
||
1328 |
✗✓ | 368 |
if (end < t) { |
1329 |
av_log(ctx->avctx, AV_LOG_ERROR, "end %"PTRDIFF_SPECIFIER" smaller than time diff index %d.\n", end, t); |
||
1330 |
return AVERROR_INVALIDDATA; |
||
1331 |
} |
||
1332 |
368 |
end -= t; |
|
1333 |
} |
||
1334 |
|||
1335 |
✓✓✓✗ |
681 |
if (FFMIN(begin - 1, begin - 1 + t) < ctx->raw_buffer - master || |
1336 |
✓✓✗✓ |
681 |
FFMAX(end + 1, end + 1 + t) > ctx->raw_buffer + channels * channel_size - master) { |
1337 |
av_log(ctx->avctx, AV_LOG_ERROR, |
||
1338 |
"sample pointer range [%p, %p] not contained in raw_buffer [%p, %p].\n", |
||
1339 |
master + FFMIN(begin - 1, begin - 1 + t), master + FFMAX(end + 1, end + 1 + t), |
||
1340 |
ctx->raw_buffer, ctx->raw_buffer + channels * channel_size); |
||
1341 |
return AVERROR_INVALIDDATA; |
||
1342 |
} |
||
1343 |
|||
1344 |
✓✓ | 1845643 |
for (smp = begin; smp < end; smp++) { |
1345 |
1844962 |
y = (1 << 6) + |
|
1346 |
1844962 |
MUL64(ch[dep].weighting[0], master[smp - 1 ]) + |
|
1347 |
1844962 |
MUL64(ch[dep].weighting[1], master[smp ]) + |
|
1348 |
1844962 |
MUL64(ch[dep].weighting[2], master[smp + 1 ]) + |
|
1349 |
1844962 |
MUL64(ch[dep].weighting[3], master[smp - 1 + t]) + |
|
1350 |
1844962 |
MUL64(ch[dep].weighting[4], master[smp + t]) + |
|
1351 |
1844962 |
MUL64(ch[dep].weighting[5], master[smp + 1 + t]); |
|
1352 |
|||
1353 |
1844962 |
bd->raw_samples[smp] += y >> 7; |
|
1354 |
} |
||
1355 |
} else { |
||
1356 |
|||
1357 |
✓✗ | 545 |
if (begin - 1 < ctx->raw_buffer - master || |
1358 |
✗✓ | 545 |
end + 1 > ctx->raw_buffer + channels * channel_size - master) { |
1359 |
av_log(ctx->avctx, AV_LOG_ERROR, |
||
1360 |
"sample pointer range [%p, %p] not contained in raw_buffer [%p, %p].\n", |
||
1361 |
master + begin - 1, master + end + 1, |
||
1362 |
ctx->raw_buffer, ctx->raw_buffer + channels * channel_size); |
||
1363 |
return AVERROR_INVALIDDATA; |
||
1364 |
} |
||
1365 |
|||
1366 |
✓✓ | 1568069 |
for (smp = begin; smp < end; smp++) { |
1367 |
1567524 |
y = (1 << 6) + |
|
1368 |
1567524 |
MUL64(ch[dep].weighting[0], master[smp - 1]) + |
|
1369 |
1567524 |
MUL64(ch[dep].weighting[1], master[smp ]) + |
|
1370 |
1567524 |
MUL64(ch[dep].weighting[2], master[smp + 1]); |
|
1371 |
|||
1372 |
1567524 |
bd->raw_samples[smp] += y >> 7; |
|
1373 |
} |
||
1374 |
} |
||
1375 |
} |
||
1376 |
|||
1377 |
1722 |
return 0; |
|
1378 |
} |
||
1379 |
|||
1380 |
|||
1381 |
/** multiply two softfloats and handle the rounding off |
||
1382 |
*/ |
||
1383 |
static SoftFloat_IEEE754 multiply(SoftFloat_IEEE754 a, SoftFloat_IEEE754 b) { |
||
1384 |
uint64_t mantissa_temp; |
||
1385 |
uint64_t mask_64; |
||
1386 |
int cutoff_bit_count; |
||
1387 |
unsigned char last_2_bits; |
||
1388 |
unsigned int mantissa; |
||
1389 |
int32_t sign; |
||
1390 |
uint32_t return_val = 0; |
||
1391 |
int bit_count = 48; |
||
1392 |
|||
1393 |
sign = a.sign ^ b.sign; |
||
1394 |
|||
1395 |
// Multiply mantissa bits in a 64-bit register |
||
1396 |
mantissa_temp = (uint64_t)a.mant * (uint64_t)b.mant; |
||
1397 |
mask_64 = (uint64_t)0x1 << 47; |
||
1398 |
|||
1399 |
if (!mantissa_temp) |
||
1400 |
return FLOAT_0; |
||
1401 |
|||
1402 |
// Count the valid bit count |
||
1403 |
while (!(mantissa_temp & mask_64) && mask_64) { |
||
1404 |
bit_count--; |
||
1405 |
mask_64 >>= 1; |
||
1406 |
} |
||
1407 |
|||
1408 |
// Round off |
||
1409 |
cutoff_bit_count = bit_count - 24; |
||
1410 |
if (cutoff_bit_count > 0) { |
||
1411 |
last_2_bits = (unsigned char)(((unsigned int)mantissa_temp >> (cutoff_bit_count - 1)) & 0x3 ); |
||
1412 |
if ((last_2_bits == 0x3) || ((last_2_bits == 0x1) && ((unsigned int)mantissa_temp & ((0x1UL << (cutoff_bit_count - 1)) - 1)))) { |
||
1413 |
// Need to round up |
||
1414 |
mantissa_temp += (uint64_t)0x1 << cutoff_bit_count; |
||
1415 |
} |
||
1416 |
} |
||
1417 |
|||
1418 |
if (cutoff_bit_count >= 0) { |
||
1419 |
mantissa = (unsigned int)(mantissa_temp >> cutoff_bit_count); |
||
1420 |
} else { |
||
1421 |
mantissa = (unsigned int)(mantissa_temp <<-cutoff_bit_count); |
||
1422 |
} |
||
1423 |
|||
1424 |
// Need one more shift? |
||
1425 |
if (mantissa & 0x01000000ul) { |
||
1426 |
bit_count++; |
||
1427 |
mantissa >>= 1; |
||
1428 |
} |
||
1429 |
|||
1430 |
if (!sign) { |
||
1431 |
return_val = 0x80000000U; |
||
1432 |
} |
||
1433 |
|||
1434 |
return_val |= ((unsigned)av_clip(a.exp + b.exp + bit_count - 47, -126, 127) << 23) & 0x7F800000; |
||
1435 |
return_val |= mantissa; |
||
1436 |
return av_bits2sf_ieee754(return_val); |
||
1437 |
} |
||
1438 |
|||
1439 |
|||
1440 |
/** Read and decode the floating point sample data |
||
1441 |
*/ |
||
1442 |
static int read_diff_float_data(ALSDecContext *ctx, unsigned int ra_frame) { |
||
1443 |
AVCodecContext *avctx = ctx->avctx; |
||
1444 |
GetBitContext *gb = &ctx->gb; |
||
1445 |
SoftFloat_IEEE754 *acf = ctx->acf; |
||
1446 |
int *shift_value = ctx->shift_value; |
||
1447 |
int *last_shift_value = ctx->last_shift_value; |
||
1448 |
int *last_acf_mantissa = ctx->last_acf_mantissa; |
||
1449 |
int **raw_mantissa = ctx->raw_mantissa; |
||
1450 |
int *nbits = ctx->nbits; |
||
1451 |
unsigned char *larray = ctx->larray; |
||
1452 |
int frame_length = ctx->cur_frame_length; |
||
1453 |
SoftFloat_IEEE754 scale = av_int2sf_ieee754(0x1u, 23); |
||
1454 |
unsigned int partA_flag; |
||
1455 |
unsigned int highest_byte; |
||
1456 |
unsigned int shift_amp; |
||
1457 |
uint32_t tmp_32; |
||
1458 |
int use_acf; |
||
1459 |
int nchars; |
||
1460 |
int i; |
||
1461 |
int c; |
||
1462 |
long k; |
||
1463 |
long nbits_aligned; |
||
1464 |
unsigned long acc; |
||
1465 |
unsigned long j; |
||
1466 |
uint32_t sign; |
||
1467 |
uint32_t e; |
||
1468 |
uint32_t mantissa; |
||
1469 |
|||
1470 |
skip_bits_long(gb, 32); //num_bytes_diff_float |
||
1471 |
use_acf = get_bits1(gb); |
||
1472 |
|||
1473 |
if (ra_frame) { |
||
1474 |
memset(last_acf_mantissa, 0, avctx->channels * sizeof(*last_acf_mantissa)); |
||
1475 |
memset(last_shift_value, 0, avctx->channels * sizeof(*last_shift_value) ); |
||
1476 |
ff_mlz_flush_dict(ctx->mlz); |
||
1477 |
} |
||
1478 |
|||
1479 |
if (avctx->channels * 8 > get_bits_left(gb)) |
||
1480 |
return AVERROR_INVALIDDATA; |
||
1481 |
|||
1482 |
for (c = 0; c < avctx->channels; ++c) { |
||
1483 |
if (use_acf) { |
||
1484 |
//acf_flag |
||
1485 |
if (get_bits1(gb)) { |
||
1486 |
tmp_32 = get_bits(gb, 23); |
||
1487 |
last_acf_mantissa[c] = tmp_32; |
||
1488 |
} else { |
||
1489 |
tmp_32 = last_acf_mantissa[c]; |
||
1490 |
} |
||
1491 |
acf[c] = av_bits2sf_ieee754(tmp_32); |
||
1492 |
} else { |
||
1493 |
acf[c] = FLOAT_1; |
||
1494 |
} |
||
1495 |
|||
1496 |
highest_byte = get_bits(gb, 2); |
||
1497 |
partA_flag = get_bits1(gb); |
||
1498 |
shift_amp = get_bits1(gb); |
||
1499 |
|||
1500 |
if (shift_amp) { |
||
1501 |
shift_value[c] = get_bits(gb, 8); |
||
1502 |
last_shift_value[c] = shift_value[c]; |
||
1503 |
} else { |
||
1504 |
shift_value[c] = last_shift_value[c]; |
||
1505 |
} |
||
1506 |
|||
1507 |
if (partA_flag) { |
||
1508 |
if (!get_bits1(gb)) { //uncompressed |
||
1509 |
for (i = 0; i < frame_length; ++i) { |
||
1510 |
if (ctx->raw_samples[c][i] == 0) { |
||
1511 |
ctx->raw_mantissa[c][i] = get_bits_long(gb, 32); |
||
1512 |
} |
||
1513 |
} |
||
1514 |
} else { //compressed |
||
1515 |
nchars = 0; |
||
1516 |
for (i = 0; i < frame_length; ++i) { |
||
1517 |
if (ctx->raw_samples[c][i] == 0) { |
||
1518 |
nchars += 4; |
||
1519 |
} |
||
1520 |
} |
||
1521 |
|||
1522 |
tmp_32 = ff_mlz_decompression(ctx->mlz, gb, nchars, larray); |
||
1523 |
if(tmp_32 != nchars) { |
||
1524 |
av_log(ctx->avctx, AV_LOG_ERROR, "Error in MLZ decompression (%"PRId32", %d).\n", tmp_32, nchars); |
||
1525 |
return AVERROR_INVALIDDATA; |
||
1526 |
} |
||
1527 |
|||
1528 |
for (i = 0; i < frame_length; ++i) { |
||
1529 |
ctx->raw_mantissa[c][i] = AV_RB32(larray); |
||
1530 |
} |
||
1531 |
} |
||
1532 |
} |
||
1533 |
|||
1534 |
//decode part B |
||
1535 |
if (highest_byte) { |
||
1536 |
for (i = 0; i < frame_length; ++i) { |
||
1537 |
if (ctx->raw_samples[c][i] != 0) { |
||
1538 |
//The following logic is taken from Tabel 14.45 and 14.46 from the ISO spec |
||
1539 |
if (av_cmp_sf_ieee754(acf[c], FLOAT_1)) { |
||
1540 |
nbits[i] = 23 - av_log2(abs(ctx->raw_samples[c][i])); |
||
1541 |
} else { |
||
1542 |
nbits[i] = 23; |
||
1543 |
} |
||
1544 |
nbits[i] = FFMIN(nbits[i], highest_byte*8); |
||
1545 |
} |
||
1546 |
} |
||
1547 |
|||
1548 |
if (!get_bits1(gb)) { //uncompressed |
||
1549 |
for (i = 0; i < frame_length; ++i) { |
||
1550 |
if (ctx->raw_samples[c][i] != 0) { |
||
1551 |
raw_mantissa[c][i] = get_bitsz(gb, nbits[i]); |
||
1552 |
} |
||
1553 |
} |
||
1554 |
} else { //compressed |
||
1555 |
nchars = 0; |
||
1556 |
for (i = 0; i < frame_length; ++i) { |
||
1557 |
if (ctx->raw_samples[c][i]) { |
||
1558 |
nchars += (int) nbits[i] / 8; |
||
1559 |
if (nbits[i] & 7) { |
||
1560 |
++nchars; |
||
1561 |
} |
||
1562 |
} |
||
1563 |
} |
||
1564 |
|||
1565 |
tmp_32 = ff_mlz_decompression(ctx->mlz, gb, nchars, larray); |
||
1566 |
if(tmp_32 != nchars) { |
||
1567 |
av_log(ctx->avctx, AV_LOG_ERROR, "Error in MLZ decompression (%"PRId32", %d).\n", tmp_32, nchars); |
||
1568 |
return AVERROR_INVALIDDATA; |
||
1569 |
} |
||
1570 |
|||
1571 |
j = 0; |
||
1572 |
for (i = 0; i < frame_length; ++i) { |
||
1573 |
if (ctx->raw_samples[c][i]) { |
||
1574 |
if (nbits[i] & 7) { |
||
1575 |
nbits_aligned = 8 * ((unsigned int)(nbits[i] / 8) + 1); |
||
1576 |
} else { |
||
1577 |
nbits_aligned = nbits[i]; |
||
1578 |
} |
||
1579 |
acc = 0; |
||
1580 |
for (k = 0; k < nbits_aligned/8; ++k) { |
||
1581 |
acc = (acc << 8) + larray[j++]; |
||
1582 |
} |
||
1583 |
acc >>= (nbits_aligned - nbits[i]); |
||
1584 |
raw_mantissa[c][i] = acc; |
||
1585 |
} |
||
1586 |
} |
||
1587 |
} |
||
1588 |
} |
||
1589 |
|||
1590 |
for (i = 0; i < frame_length; ++i) { |
||
1591 |
SoftFloat_IEEE754 pcm_sf = av_int2sf_ieee754(ctx->raw_samples[c][i], 0); |
||
1592 |
pcm_sf = av_div_sf_ieee754(pcm_sf, scale); |
||
1593 |
|||
1594 |
if (ctx->raw_samples[c][i] != 0) { |
||
1595 |
if (!av_cmp_sf_ieee754(acf[c], FLOAT_1)) { |
||
1596 |
pcm_sf = multiply(acf[c], pcm_sf); |
||
1597 |
} |
||
1598 |
|||
1599 |
sign = pcm_sf.sign; |
||
1600 |
e = pcm_sf.exp; |
||
1601 |
mantissa = (pcm_sf.mant | 0x800000) + raw_mantissa[c][i]; |
||
1602 |
|||
1603 |
while(mantissa >= 0x1000000) { |
||
1604 |
e++; |
||
1605 |
mantissa >>= 1; |
||
1606 |
} |
||
1607 |
|||
1608 |
if (mantissa) e += (shift_value[c] - 127); |
||
1609 |
mantissa &= 0x007fffffUL; |
||
1610 |
|||
1611 |
tmp_32 = (sign << 31) | ((e + EXP_BIAS) << 23) | (mantissa); |
||
1612 |
ctx->raw_samples[c][i] = tmp_32; |
||
1613 |
} else { |
||
1614 |
ctx->raw_samples[c][i] = raw_mantissa[c][i] & 0x007fffffUL; |
||
1615 |
} |
||
1616 |
} |
||
1617 |
align_get_bits(gb); |
||
1618 |
} |
||
1619 |
return 0; |
||
1620 |
} |
||
1621 |
|||
1622 |
|||
1623 |
/** Read the frame data. |
||
1624 |
*/ |
||
1625 |
1835 |
static int read_frame_data(ALSDecContext *ctx, unsigned int ra_frame) |
|
1626 |
{ |
||
1627 |
1835 |
ALSSpecificConfig *sconf = &ctx->sconf; |
|
1628 |
1835 |
AVCodecContext *avctx = ctx->avctx; |
|
1629 |
1835 |
GetBitContext *gb = &ctx->gb; |
|
1630 |
unsigned int div_blocks[32]; ///< block sizes. |
||
1631 |
unsigned int c; |
||
1632 |
unsigned int js_blocks[2]; |
||
1633 |
1835 |
uint32_t bs_info = 0; |
|
1634 |
int ret; |
||
1635 |
|||
1636 |
// skip the size of the ra unit if present in the frame |
||
1637 |
✓✓✗✓ |
1835 |
if (sconf->ra_flag == RA_FLAG_FRAMES && ra_frame) |
1638 |
skip_bits_long(gb, 32); |
||
1639 |
|||
1640 |
✓✓✓✓ |
1835 |
if (sconf->mc_coding && sconf->joint_stereo) { |
1641 |
2 |
ctx->js_switch = get_bits1(gb); |
|
1642 |
2 |
align_get_bits(gb); |
|
1643 |
} |
||
1644 |
|||
1645 |
✓✓✗✓ |
3319 |
if (!sconf->mc_coding || ctx->js_switch) { |
1646 |
1484 |
int independent_bs = !sconf->joint_stereo; |
|
1647 |
|||
1648 |
✓✓ | 4037 |
for (c = 0; c < avctx->channels; c++) { |
1649 |
2553 |
js_blocks[0] = 0; |
|
1650 |
2553 |
js_blocks[1] = 0; |
|
1651 |
|||
1652 |
2553 |
get_block_sizes(ctx, div_blocks, &bs_info); |
|
1653 |
|||
1654 |
// if joint_stereo and block_switching is set, independent decoding |
||
1655 |
// is signaled via the first bit of bs_info |
||
1656 |
✓✓✓✓ |
2553 |
if (sconf->joint_stereo && sconf->block_switching) |
1657 |
✓✓ | 110 |
if (bs_info >> 31) |
1658 |
22 |
independent_bs = 2; |
|
1659 |
|||
1660 |
// if this is the last channel, it has to be decoded independently |
||
1661 |
✓✓✗✓ |
2553 |
if (c == avctx->channels - 1 || (c & 1)) |
1662 |
1069 |
independent_bs = 1; |
|
1663 |
|||
1664 |
✓✓ | 2553 |
if (independent_bs) { |
1665 |
2138 |
ret = decode_blocks_ind(ctx, ra_frame, c, |
|
1666 |
div_blocks, js_blocks); |
||
1667 |
✗✓ | 2138 |
if (ret < 0) |
1668 |
return ret; |
||
1669 |
2138 |
independent_bs--; |
|
1670 |
} else { |
||
1671 |
415 |
ret = decode_blocks(ctx, ra_frame, c, div_blocks, js_blocks); |
|
1672 |
✗✓ | 415 |
if (ret < 0) |
1673 |
return ret; |
||
1674 |
|||
1675 |
415 |
c++; |
|
1676 |
} |
||
1677 |
|||
1678 |
// store carryover raw samples |
||
1679 |
2553 |
memmove(ctx->raw_samples[c] - sconf->max_order, |
|
1680 |
2553 |
ctx->raw_samples[c] - sconf->max_order + sconf->frame_length, |
|
1681 |
2553 |
sizeof(*ctx->raw_samples[c]) * sconf->max_order); |
|
1682 |
2553 |
ctx->highest_decoded_channel = c; |
|
1683 |
} |
||
1684 |
} else { // multi-channel coding |
||
1685 |
351 |
ALSBlockData bd = { 0 }; |
|
1686 |
int b, ret; |
||
1687 |
351 |
int *reverted_channels = ctx->reverted_channels; |
|
1688 |
351 |
unsigned int offset = 0; |
|
1689 |
|||
1690 |
✓✓ | 2073 |
for (c = 0; c < avctx->channels; c++) |
1691 |
✗✓ | 1722 |
if (ctx->chan_data[c] < ctx->chan_data_buffer) { |
1692 |
av_log(ctx->avctx, AV_LOG_ERROR, "Invalid channel data.\n"); |
||
1693 |
return AVERROR_INVALIDDATA; |
||
1694 |
} |
||
1695 |
|||
1696 |
351 |
memset(reverted_channels, 0, sizeof(*reverted_channels) * avctx->channels); |
|
1697 |
|||
1698 |
351 |
bd.ra_block = ra_frame; |
|
1699 |
351 |
bd.prev_raw_samples = ctx->prev_raw_samples; |
|
1700 |
|||
1701 |
351 |
get_block_sizes(ctx, div_blocks, &bs_info); |
|
1702 |
|||
1703 |
✓✓ | 702 |
for (b = 0; b < ctx->num_blocks; b++) { |
1704 |
351 |
bd.block_length = div_blocks[b]; |
|
1705 |
✗✓ | 351 |
if (bd.block_length <= 0) { |
1706 |
av_log(ctx->avctx, AV_LOG_WARNING, |
||
1707 |
"Invalid block length %u in channel data!\n", |
||
1708 |
bd.block_length); |
||
1709 |
continue; |
||
1710 |
} |
||
1711 |
|||
1712 |
✓✓ | 2073 |
for (c = 0; c < avctx->channels; c++) { |
1713 |
1722 |
bd.const_block = ctx->const_block + c; |
|
1714 |
1722 |
bd.shift_lsbs = ctx->shift_lsbs + c; |
|
1715 |
1722 |
bd.opt_order = ctx->opt_order + c; |
|
1716 |
1722 |
bd.store_prev_samples = ctx->store_prev_samples + c; |
|
1717 |
1722 |
bd.use_ltp = ctx->use_ltp + c; |
|
1718 |
1722 |
bd.ltp_lag = ctx->ltp_lag + c; |
|
1719 |
1722 |
bd.ltp_gain = ctx->ltp_gain[c]; |
|
1720 |
1722 |
bd.lpc_cof = ctx->lpc_cof[c]; |
|
1721 |
1722 |
bd.quant_cof = ctx->quant_cof[c]; |
|
1722 |
1722 |
bd.raw_samples = ctx->raw_samples[c] + offset; |
|
1723 |
1722 |
bd.raw_other = NULL; |
|
1724 |
|||
1725 |
✗✓ | 1722 |
if ((ret = read_block(ctx, &bd)) < 0) |
1726 |
return ret; |
||
1727 |
✗✓ | 1722 |
if ((ret = read_channel_data(ctx, ctx->chan_data[c], c)) < 0) |
1728 |
return ret; |
||
1729 |
} |
||
1730 |
|||
1731 |
✓✓ | 2073 |
for (c = 0; c < avctx->channels; c++) { |
1732 |
1722 |
ret = revert_channel_correlation(ctx, &bd, ctx->chan_data, |
|
1733 |
reverted_channels, offset, c); |
||
1734 |
✗✓ | 1722 |
if (ret < 0) |
1735 |
return ret; |
||
1736 |
} |
||
1737 |
✓✓ | 2073 |
for (c = 0; c < avctx->channels; c++) { |
1738 |
1722 |
bd.const_block = ctx->const_block + c; |
|
1739 |
1722 |
bd.shift_lsbs = ctx->shift_lsbs + c; |
|
1740 |
1722 |
bd.opt_order = ctx->opt_order + c; |
|
1741 |
1722 |
bd.store_prev_samples = ctx->store_prev_samples + c; |
|
1742 |
1722 |
bd.use_ltp = ctx->use_ltp + c; |
|
1743 |
1722 |
bd.ltp_lag = ctx->ltp_lag + c; |
|
1744 |
1722 |
bd.ltp_gain = ctx->ltp_gain[c]; |
|
1745 |
1722 |
bd.lpc_cof = ctx->lpc_cof[c]; |
|
1746 |
1722 |
bd.quant_cof = ctx->quant_cof[c]; |
|
1747 |
1722 |
bd.raw_samples = ctx->raw_samples[c] + offset; |
|
1748 |
|||
1749 |
✗✓ | 1722 |
if ((ret = decode_block(ctx, &bd)) < 0) |
1750 |
return ret; |
||
1751 |
|||
1752 |
1722 |
ctx->highest_decoded_channel = FFMAX(ctx->highest_decoded_channel, c); |
|
1753 |
} |
||
1754 |
|||
1755 |
351 |
memset(reverted_channels, 0, avctx->channels * sizeof(*reverted_channels)); |
|
1756 |
351 |
offset += div_blocks[b]; |
|
1757 |
351 |
bd.ra_block = 0; |
|
1758 |
} |
||
1759 |
|||
1760 |
// store carryover raw samples |
||
1761 |
✓✓ | 2073 |
for (c = 0; c < avctx->channels; c++) |
1762 |
1722 |
memmove(ctx->raw_samples[c] - sconf->max_order, |
|
1763 |
1722 |
ctx->raw_samples[c] - sconf->max_order + sconf->frame_length, |
|
1764 |
1722 |
sizeof(*ctx->raw_samples[c]) * sconf->max_order); |
|
1765 |
} |
||
1766 |
|||
1767 |
✗✓ | 1835 |
if (sconf->floating) { |
1768 |
read_diff_float_data(ctx, ra_frame); |
||
1769 |
} |
||
1770 |
|||
1771 |
✗✓ | 1835 |
if (get_bits_left(gb) < 0) { |
1772 |
av_log(ctx->avctx, AV_LOG_ERROR, "Overread %d\n", -get_bits_left(gb)); |
||
1773 |
return AVERROR_INVALIDDATA; |
||
1774 |
} |
||
1775 |
|||
1776 |
1835 |
return 0; |
|
1777 |
} |
||
1778 |
|||
1779 |
|||
1780 |
/** Decode an ALS frame. |
||
1781 |
*/ |
||
1782 |
1835 |
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame_ptr, |
|
1783 |
AVPacket *avpkt) |
||
1784 |
{ |
||
1785 |
1835 |
ALSDecContext *ctx = avctx->priv_data; |
|
1786 |
1835 |
AVFrame *frame = data; |
|
1787 |
1835 |
ALSSpecificConfig *sconf = &ctx->sconf; |
|
1788 |
1835 |
const uint8_t *buffer = avpkt->data; |
|
1789 |
1835 |
int buffer_size = avpkt->size; |
|
1790 |
int invalid_frame, ret; |
||
1791 |
unsigned int c, sample, ra_frame, bytes_read, shift; |
||
1792 |
|||
1793 |
✗✓ | 1835 |
if ((ret = init_get_bits8(&ctx->gb, buffer, buffer_size)) < 0) |
1794 |
return ret; |
||
1795 |
|||
1796 |
// In the case that the distance between random access frames is set to zero |
||
1797 |
// (sconf->ra_distance == 0) no frame is treated as a random access frame. |
||
1798 |
// For the first frame, if prediction is used, all samples used from the |
||
1799 |
// previous frame are assumed to be zero. |
||
1800 |
✓✓✓✗ |
1835 |
ra_frame = sconf->ra_distance && !(ctx->frame_id % sconf->ra_distance); |
1801 |
|||
1802 |
// the last frame to decode might have a different length |
||
1803 |
✓✗ | 1835 |
if (sconf->samples != 0xFFFFFFFF) |
1804 |
1835 |
ctx->cur_frame_length = FFMIN(sconf->samples - ctx->frame_id * (uint64_t) sconf->frame_length, |
|
1805 |
sconf->frame_length); |
||
1806 |
else |
||
1807 |
ctx->cur_frame_length = sconf->frame_length; |
||
1808 |
|||
1809 |
1835 |
ctx->highest_decoded_channel = 0; |
|
1810 |
// decode the frame data |
||
1811 |
✗✓ | 1835 |
if ((invalid_frame = read_frame_data(ctx, ra_frame)) < 0) |
1812 |
av_log(ctx->avctx, AV_LOG_WARNING, |
||
1813 |
"Reading frame data failed. Skipping RA unit.\n"); |
||
1814 |
|||
1815 |
✗✓ | 1835 |
if (ctx->highest_decoded_channel == 0) |
1816 |
return AVERROR_INVALIDDATA; |
||
1817 |
|||
1818 |
1835 |
ctx->frame_id++; |
|
1819 |
|||
1820 |
/* get output buffer */ |
||
1821 |
1835 |
frame->nb_samples = ctx->cur_frame_length; |
|
1822 |
✗✓ | 1835 |
if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) |
1823 |
return ret; |
||
1824 |
|||
1825 |
// transform decoded frame into output format |
||
1826 |
#define INTERLEAVE_OUTPUT(bps) \ |
||
1827 |
{ \ |
||
1828 |
int##bps##_t *dest = (int##bps##_t*)frame->data[0]; \ |
||
1829 |
int channels = avctx->channels; \ |
||
1830 |
int32_t *raw_samples = ctx->raw_samples[0]; \ |
||
1831 |
int raw_step = channels > 1 ? ctx->raw_samples[1] - raw_samples : 1; \ |
||
1832 |
shift = bps - ctx->avctx->bits_per_raw_sample; \ |
||
1833 |
if (!ctx->cs_switch) { \ |
||
1834 |
for (sample = 0; sample < ctx->cur_frame_length; sample++) \ |
||
1835 |
for (c = 0; c < channels; c++) \ |
||
1836 |
*dest++ = raw_samples[c*raw_step + sample] * (1U << shift); \ |
||
1837 |
} else { \ |
||
1838 |
for (sample = 0; sample < ctx->cur_frame_length; sample++) \ |
||
1839 |
for (c = 0; c < channels; c++) \ |
||
1840 |
*dest++ = raw_samples[sconf->chan_pos[c]*raw_step + sample] * (1U << shift);\ |
||
1841 |
} \ |
||
1842 |
} |
||
1843 |
|||
1844 |
✓✗ | 1835 |
if (ctx->avctx->bits_per_raw_sample <= 16) { |
1845 |
✓✗✓✗ ✓✓✓✓ ✗✗✗✗ |
16014599 |
INTERLEAVE_OUTPUT(16) |
1846 |
} else { |
||
1847 |
INTERLEAVE_OUTPUT(32) |
||
1848 |
} |
||
1849 |
|||
1850 |
// update CRC |
||
1851 |
✓✗✗✓ |
1835 |
if (sconf->crc_enabled && (avctx->err_recognition & (AV_EF_CRCCHECK|AV_EF_CAREFUL))) { |
1852 |
int swap = HAVE_BIGENDIAN != sconf->msb_first; |
||
1853 |
|||
1854 |
if (ctx->avctx->bits_per_raw_sample == 24) { |
||
1855 |
int32_t *src = (int32_t *)frame->data[0]; |
||
1856 |
|||
1857 |
for (sample = 0; |
||
1858 |
sample < ctx->cur_frame_length * avctx->channels; |
||
1859 |
sample++) { |
||
1860 |
int32_t v; |
||
1861 |
|||
1862 |
if (swap) |
||
1863 |
v = av_bswap32(src[sample]); |
||
1864 |
else |
||
1865 |
v = src[sample]; |
||
1866 |
if (!HAVE_BIGENDIAN) |
||
1867 |
v >>= 8; |
||
1868 |
|||
1869 |
ctx->crc = av_crc(ctx->crc_table, ctx->crc, (uint8_t*)(&v), 3); |
||
1870 |
} |
||
1871 |
} else { |
||
1872 |
uint8_t *crc_source; |
||
1873 |
|||
1874 |
if (swap) { |
||
1875 |
if (ctx->avctx->bits_per_raw_sample <= 16) { |
||
1876 |
int16_t *src = (int16_t*) frame->data[0]; |
||
1877 |
int16_t *dest = (int16_t*) ctx->crc_buffer; |
||
1878 |
for (sample = 0; |
||
1879 |
sample < ctx->cur_frame_length * avctx->channels; |
||
1880 |
sample++) |
||
1881 |
*dest++ = av_bswap16(src[sample]); |
||
1882 |
} else { |
||
1883 |
ctx->bdsp.bswap_buf((uint32_t *) ctx->crc_buffer, |
||
1884 |
(uint32_t *) frame->data[0], |
||
1885 |
ctx->cur_frame_length * avctx->channels); |
||
1886 |
} |
||
1887 |
crc_source = ctx->crc_buffer; |
||
1888 |
} else { |
||
1889 |
crc_source = frame->data[0]; |
||
1890 |
} |
||
1891 |
|||
1892 |
ctx->crc = av_crc(ctx->crc_table, ctx->crc, crc_source, |
||
1893 |
ctx->cur_frame_length * avctx->channels * |
||
1894 |
av_get_bytes_per_sample(avctx->sample_fmt)); |
||
1895 |
} |
||
1896 |
|||
1897 |
|||
1898 |
// check CRC sums if this is the last frame |
||
1899 |
if (ctx->cur_frame_length != sconf->frame_length && |
||
1900 |
ctx->crc_org != ctx->crc) { |
||
1901 |
av_log(avctx, AV_LOG_ERROR, "CRC error.\n"); |
||
1902 |
if (avctx->err_recognition & AV_EF_EXPLODE) |
||
1903 |
return AVERROR_INVALIDDATA; |
||
1904 |
} |
||
1905 |
} |
||
1906 |
|||
1907 |
1835 |
*got_frame_ptr = 1; |
|
1908 |
|||
1909 |
✓✗ | 1835 |
bytes_read = invalid_frame ? buffer_size : |
1910 |
1835 |
(get_bits_count(&ctx->gb) + 7) >> 3; |
|
1911 |
|||
1912 |
1835 |
return bytes_read; |
|
1913 |
} |
||
1914 |
|||
1915 |
|||
1916 |
/** Uninitialize the ALS decoder. |
||
1917 |
*/ |
||
1918 |
14 |
static av_cold int decode_end(AVCodecContext *avctx) |
|
1919 |
{ |
||
1920 |
14 |
ALSDecContext *ctx = avctx->priv_data; |
|
1921 |
int i; |
||
1922 |
|||
1923 |
14 |
av_freep(&ctx->sconf.chan_pos); |
|
1924 |
|||
1925 |
14 |
ff_bgmc_end(&ctx->bgmc_lut, &ctx->bgmc_lut_status); |
|
1926 |
|||
1927 |
14 |
av_freep(&ctx->const_block); |
|
1928 |
14 |
av_freep(&ctx->shift_lsbs); |
|
1929 |
14 |
av_freep(&ctx->opt_order); |
|
1930 |
14 |
av_freep(&ctx->store_prev_samples); |
|
1931 |
14 |
av_freep(&ctx->use_ltp); |
|
1932 |
14 |
av_freep(&ctx->ltp_lag); |
|
1933 |
14 |
av_freep(&ctx->ltp_gain); |
|
1934 |
14 |
av_freep(&ctx->ltp_gain_buffer); |
|
1935 |
14 |
av_freep(&ctx->quant_cof); |
|
1936 |
14 |
av_freep(&ctx->lpc_cof); |
|
1937 |
14 |
av_freep(&ctx->quant_cof_buffer); |
|
1938 |
14 |
av_freep(&ctx->lpc_cof_buffer); |
|
1939 |
14 |
av_freep(&ctx->lpc_cof_reversed_buffer); |
|
1940 |
14 |
av_freep(&ctx->prev_raw_samples); |
|
1941 |
14 |
av_freep(&ctx->raw_samples); |
|
1942 |
14 |
av_freep(&ctx->raw_buffer); |
|
1943 |
14 |
av_freep(&ctx->chan_data); |
|
1944 |
14 |
av_freep(&ctx->chan_data_buffer); |
|
1945 |
14 |
av_freep(&ctx->reverted_channels); |
|
1946 |
14 |
av_freep(&ctx->crc_buffer); |
|
1947 |
✗✓ | 14 |
if (ctx->mlz) { |
1948 |
av_freep(&ctx->mlz->dict); |
||
1949 |
av_freep(&ctx->mlz); |
||
1950 |
} |
||
1951 |
14 |
av_freep(&ctx->acf); |
|
1952 |
14 |
av_freep(&ctx->last_acf_mantissa); |
|
1953 |
14 |
av_freep(&ctx->shift_value); |
|
1954 |
14 |
av_freep(&ctx->last_shift_value); |
|
1955 |
✗✓ | 14 |
if (ctx->raw_mantissa) { |
1956 |
for (i = 0; i < avctx->channels; i++) { |
||
1957 |
av_freep(&ctx->raw_mantissa[i]); |
||
1958 |
} |
||
1959 |
av_freep(&ctx->raw_mantissa); |
||
1960 |
} |
||
1961 |
14 |
av_freep(&ctx->larray); |
|
1962 |
14 |
av_freep(&ctx->nbits); |
|
1963 |
|||
1964 |
14 |
return 0; |
|
1965 |
} |
||
1966 |
|||
1967 |
|||
1968 |
/** Initialize the ALS decoder. |
||
1969 |
*/ |
||
1970 |
14 |
static av_cold int decode_init(AVCodecContext *avctx) |
|
1971 |
{ |
||
1972 |
unsigned int c; |
||
1973 |
unsigned int channel_size; |
||
1974 |
int num_buffers, ret; |
||
1975 |
14 |
ALSDecContext *ctx = avctx->priv_data; |
|
1976 |
14 |
ALSSpecificConfig *sconf = &ctx->sconf; |
|
1977 |
14 |
ctx->avctx = avctx; |
|
1978 |
|||
1979 |
✗✓ | 14 |
if (!avctx->extradata) { |
1980 |
av_log(avctx, AV_LOG_ERROR, "Missing required ALS extradata.\n"); |
||
1981 |
return AVERROR_INVALIDDATA; |
||
1982 |
} |
||
1983 |
|||
1984 |
✗✓ | 14 |
if ((ret = read_specific_config(ctx)) < 0) { |
1985 |
av_log(avctx, AV_LOG_ERROR, "Reading ALSSpecificConfig failed.\n"); |
||
1986 |
goto fail; |
||
1987 |
} |
||
1988 |
|||
1989 |
✗✓ | 14 |
if ((ret = check_specific_config(ctx)) < 0) { |
1990 |
goto fail; |
||
1991 |
} |
||
1992 |
|||
1993 |
✓✓ | 14 |
if (sconf->bgmc) { |
1994 |
4 |
ret = ff_bgmc_init(avctx, &ctx->bgmc_lut, &ctx->bgmc_lut_status); |
|
1995 |
✗✓ | 4 |
if (ret < 0) |
1996 |
goto fail; |
||
1997 |
} |
||
1998 |
✗✓ | 14 |
if (sconf->floating) { |
1999 |
avctx->sample_fmt = AV_SAMPLE_FMT_FLT; |
||
2000 |
avctx->bits_per_raw_sample = 32; |
||
2001 |
} else { |
||
2002 |
28 |
avctx->sample_fmt = sconf->resolution > 1 |
|
2003 |
✗✓ | 14 |
? AV_SAMPLE_FMT_S32 : AV_SAMPLE_FMT_S16; |
2004 |
14 |
avctx->bits_per_raw_sample = (sconf->resolution + 1) * 8; |
|
2005 |
✗✓ | 14 |
if (avctx->bits_per_raw_sample > 32) { |
2006 |
av_log(avctx, AV_LOG_ERROR, "Bits per raw sample %d larger than 32.\n", |
||
2007 |
avctx->bits_per_raw_sample); |
||
2008 |
ret = AVERROR_INVALIDDATA; |
||
2009 |
goto fail; |
||
2010 |
} |
||
2011 |
} |
||
2012 |
|||
2013 |
// set maximum Rice parameter for progressive decoding based on resolution |
||
2014 |
// This is not specified in 14496-3 but actually done by the reference |
||
2015 |
// codec RM22 revision 2. |
||
2016 |
✗✓ | 14 |
ctx->s_max = sconf->resolution > 1 ? 31 : 15; |
2017 |
|||
2018 |
// set lag value for long-term prediction |
||
2019 |
✗✓ | 14 |
ctx->ltp_lag_length = 8 + (avctx->sample_rate >= 96000) + |
2020 |
14 |
(avctx->sample_rate >= 192000); |
|
2021 |
|||
2022 |
// allocate quantized parcor coefficient buffer |
||
2023 |
✓✓ | 14 |
num_buffers = sconf->mc_coding ? avctx->channels : 1; |
2024 |
✗✓ | 14 |
if (num_buffers * (uint64_t)num_buffers > INT_MAX) // protect chan_data_buffer allocation |
2025 |
return AVERROR_INVALIDDATA; |
||
2026 |
|||
2027 |
14 |
ctx->quant_cof = av_malloc_array(num_buffers, sizeof(*ctx->quant_cof)); |
|
2028 |
14 |
ctx->lpc_cof = av_malloc_array(num_buffers, sizeof(*ctx->lpc_cof)); |
|
2029 |
14 |
ctx->quant_cof_buffer = av_malloc_array(num_buffers * sconf->max_order, |
|
2030 |
sizeof(*ctx->quant_cof_buffer)); |
||
2031 |
14 |
ctx->lpc_cof_buffer = av_malloc_array(num_buffers * sconf->max_order, |
|
2032 |
sizeof(*ctx->lpc_cof_buffer)); |
||
2033 |
14 |
ctx->lpc_cof_reversed_buffer = av_malloc_array(sconf->max_order, |
|
2034 |
sizeof(*ctx->lpc_cof_buffer)); |
||
2035 |
|||
2036 |
✓✗✓✗ |
14 |
if (!ctx->quant_cof || !ctx->lpc_cof || |
2037 |
✓✗✓✗ |
14 |
!ctx->quant_cof_buffer || !ctx->lpc_cof_buffer || |
2038 |
✗✓ | 14 |
!ctx->lpc_cof_reversed_buffer) { |
2039 |
av_log(avctx, AV_LOG_ERROR, "Allocating buffer memory failed.\n"); |
||
2040 |
ret = AVERROR(ENOMEM); |
||
2041 |
goto fail; |
||
2042 |
} |
||
2043 |
|||
2044 |
// assign quantized parcor coefficient buffers |
||
2045 |
✓✓ | 1052 |
for (c = 0; c < num_buffers; c++) { |
2046 |
1038 |
ctx->quant_cof[c] = ctx->quant_cof_buffer + c * sconf->max_order; |
|
2047 |
1038 |
ctx->lpc_cof[c] = ctx->lpc_cof_buffer + c * sconf->max_order; |
|
2048 |
} |
||
2049 |
|||
2050 |
// allocate and assign lag and gain data buffer for ltp mode |
||
2051 |
14 |
ctx->const_block = av_malloc_array(num_buffers, sizeof(*ctx->const_block)); |
|
2052 |
14 |
ctx->shift_lsbs = av_malloc_array(num_buffers, sizeof(*ctx->shift_lsbs)); |
|
2053 |
14 |
ctx->opt_order = av_malloc_array(num_buffers, sizeof(*ctx->opt_order)); |
|
2054 |
14 |
ctx->store_prev_samples = av_malloc_array(num_buffers, sizeof(*ctx->store_prev_samples)); |
|
2055 |
14 |
ctx->use_ltp = av_mallocz_array(num_buffers, sizeof(*ctx->use_ltp)); |
|
2056 |
14 |
ctx->ltp_lag = av_malloc_array(num_buffers, sizeof(*ctx->ltp_lag)); |
|
2057 |
14 |
ctx->ltp_gain = av_malloc_array(num_buffers, sizeof(*ctx->ltp_gain)); |
|
2058 |
14 |
ctx->ltp_gain_buffer = av_malloc_array(num_buffers * 5, sizeof(*ctx->ltp_gain_buffer)); |
|
2059 |
|||
2060 |
✓✗✓✗ |
14 |
if (!ctx->const_block || !ctx->shift_lsbs || |
2061 |
✓✗✓✗ |
14 |
!ctx->opt_order || !ctx->store_prev_samples || |
2062 |
✓✗✓✗ |
14 |
!ctx->use_ltp || !ctx->ltp_lag || |
2063 |
✓✗✗✓ |
14 |
!ctx->ltp_gain || !ctx->ltp_gain_buffer) { |
2064 |
av_log(avctx, AV_LOG_ERROR, "Allocating buffer memory failed.\n"); |
||
2065 |
ret = AVERROR(ENOMEM); |
||
2066 |
goto fail; |
||
2067 |
} |
||
2068 |
|||
2069 |
✓✓ | 1052 |
for (c = 0; c < num_buffers; c++) |
2070 |
1038 |
ctx->ltp_gain[c] = ctx->ltp_gain_buffer + c * 5; |
|
2071 |
|||
2072 |
// allocate and assign channel data buffer for mcc mode |
||
2073 |
✓✓ | 14 |
if (sconf->mc_coding) { |
2074 |
4 |
ctx->chan_data_buffer = av_mallocz_array(num_buffers * num_buffers, |
|
2075 |
sizeof(*ctx->chan_data_buffer)); |
||
2076 |
4 |
ctx->chan_data = av_mallocz_array(num_buffers, |
|
2077 |
sizeof(*ctx->chan_data)); |
||
2078 |
4 |
ctx->reverted_channels = av_malloc_array(num_buffers, |
|
2079 |
sizeof(*ctx->reverted_channels)); |
||
2080 |
|||
2081 |
✓✗✓✗ ✗✓ |
4 |
if (!ctx->chan_data_buffer || !ctx->chan_data || !ctx->reverted_channels) { |
2082 |
av_log(avctx, AV_LOG_ERROR, "Allocating buffer memory failed.\n"); |
||
2083 |
ret = AVERROR(ENOMEM); |
||
2084 |
goto fail; |
||
2085 |
} |
||
2086 |
|||
2087 |
✓✓ | 1032 |
for (c = 0; c < num_buffers; c++) |
2088 |
1028 |
ctx->chan_data[c] = ctx->chan_data_buffer + c * num_buffers; |
|
2089 |
} else { |
||
2090 |
10 |
ctx->chan_data = NULL; |
|
2091 |
10 |
ctx->chan_data_buffer = NULL; |
|
2092 |
10 |
ctx->reverted_channels = NULL; |
|
2093 |
} |
||
2094 |
|||
2095 |
14 |
channel_size = sconf->frame_length + sconf->max_order; |
|
2096 |
|||
2097 |
14 |
ctx->prev_raw_samples = av_malloc_array(sconf->max_order, sizeof(*ctx->prev_raw_samples)); |
|
2098 |
14 |
ctx->raw_buffer = av_mallocz_array(avctx->channels * channel_size, sizeof(*ctx->raw_buffer)); |
|
2099 |
14 |
ctx->raw_samples = av_malloc_array(avctx->channels, sizeof(*ctx->raw_samples)); |
|
2100 |
|||
2101 |
✗✓ | 14 |
if (sconf->floating) { |
2102 |
ctx->acf = av_malloc_array(avctx->channels, sizeof(*ctx->acf)); |
||
2103 |
ctx->shift_value = av_malloc_array(avctx->channels, sizeof(*ctx->shift_value)); |
||
2104 |
ctx->last_shift_value = av_malloc_array(avctx->channels, sizeof(*ctx->last_shift_value)); |
||
2105 |
ctx->last_acf_mantissa = av_malloc_array(avctx->channels, sizeof(*ctx->last_acf_mantissa)); |
||
2106 |
ctx->raw_mantissa = av_mallocz_array(avctx->channels, sizeof(*ctx->raw_mantissa)); |
||
2107 |
|||
2108 |
ctx->larray = av_malloc_array(ctx->cur_frame_length * 4, sizeof(*ctx->larray)); |
||
2109 |
ctx->nbits = av_malloc_array(ctx->cur_frame_length, sizeof(*ctx->nbits)); |
||
2110 |
ctx->mlz = av_mallocz(sizeof(*ctx->mlz)); |
||
2111 |
|||
2112 |
if (!ctx->mlz || !ctx->acf || !ctx->shift_value || !ctx->last_shift_value |
||
2113 |
|| !ctx->last_acf_mantissa || !ctx->raw_mantissa) { |
||
2114 |
av_log(avctx, AV_LOG_ERROR, "Allocating buffer memory failed.\n"); |
||
2115 |
ret = AVERROR(ENOMEM); |
||
2116 |
goto fail; |
||
2117 |
} |
||
2118 |
|||
2119 |
ff_mlz_init_dict(avctx, ctx->mlz); |
||
2120 |
ff_mlz_flush_dict(ctx->mlz); |
||
2121 |
|||
2122 |
for (c = 0; c < avctx->channels; ++c) { |
||
2123 |
ctx->raw_mantissa[c] = av_mallocz_array(ctx->cur_frame_length, sizeof(**ctx->raw_mantissa)); |
||
2124 |
} |
||
2125 |
} |
||
2126 |
|||
2127 |
// allocate previous raw sample buffer |
||
2128 |
✓✗✓✗ ✗✓ |
14 |
if (!ctx->prev_raw_samples || !ctx->raw_buffer|| !ctx->raw_samples) { |
2129 |
av_log(avctx, AV_LOG_ERROR, "Allocating buffer memory failed.\n"); |
||
2130 |
ret = AVERROR(ENOMEM); |
||
2131 |
goto fail; |
||
2132 |
} |
||
2133 |
|||
2134 |
// assign raw samples buffers |
||
2135 |
14 |
ctx->raw_samples[0] = ctx->raw_buffer + sconf->max_order; |
|
2136 |
✓✓ | 1048 |
for (c = 1; c < avctx->channels; c++) |
2137 |
1034 |
ctx->raw_samples[c] = ctx->raw_samples[c - 1] + channel_size; |
|
2138 |
|||
2139 |
// allocate crc buffer |
||
2140 |
✗✓✗✗ |
14 |
if (HAVE_BIGENDIAN != sconf->msb_first && sconf->crc_enabled && |
2141 |
(avctx->err_recognition & (AV_EF_CRCCHECK|AV_EF_CAREFUL))) { |
||
2142 |
ctx->crc_buffer = av_malloc_array(ctx->cur_frame_length * |
||
2143 |
avctx->channels * |
||
2144 |
av_get_bytes_per_sample(avctx->sample_fmt), |
||
2145 |
sizeof(*ctx->crc_buffer)); |
||
2146 |
if (!ctx->crc_buffer) { |
||
2147 |
av_log(avctx, AV_LOG_ERROR, "Allocating buffer memory failed.\n"); |
||
2148 |
ret = AVERROR(ENOMEM); |
||
2149 |
goto fail; |
||
2150 |
} |
||
2151 |
} |
||
2152 |
|||
2153 |
14 |
ff_bswapdsp_init(&ctx->bdsp); |
|
2154 |
|||
2155 |
14 |
return 0; |
|
2156 |
|||
2157 |
fail: |
||
2158 |
return ret; |
||
2159 |
} |
||
2160 |
|||
2161 |
|||
2162 |
/** Flush (reset) the frame ID after seeking. |
||
2163 |
*/ |
||
2164 |
static av_cold void flush(AVCodecContext *avctx) |
||
2165 |
{ |
||
2166 |
ALSDecContext *ctx = avctx->priv_data; |
||
2167 |
|||
2168 |
ctx->frame_id = 0; |
||
2169 |
} |
||
2170 |
|||
2171 |
|||
2172 |
AVCodec ff_als_decoder = { |
||
2173 |
.name = "als", |
||
2174 |
.long_name = NULL_IF_CONFIG_SMALL("MPEG-4 Audio Lossless Coding (ALS)"), |
||
2175 |
.type = AVMEDIA_TYPE_AUDIO, |
||
2176 |
.id = AV_CODEC_ID_MP4ALS, |
||
2177 |
.priv_data_size = sizeof(ALSDecContext), |
||
2178 |
.init = decode_init, |
||
2179 |
.close = decode_end, |
||
2180 |
.decode = decode_frame, |
||
2181 |
.flush = flush, |
||
2182 |
.capabilities = AV_CODEC_CAP_SUBFRAMES | AV_CODEC_CAP_DR1 | AV_CODEC_CAP_CHANNEL_CONF, |
||
2183 |
.caps_internal = FF_CODEC_CAP_INIT_CLEANUP, |
||
2184 |
}; |
Generated by: GCOVR (Version 4.2) |