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Rev | Author | Line No. | Line |
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4349 | Serge | 1 | /* |
2 | * VQF demuxer |
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3 | * Copyright (c) 2009 Vitor Sessak |
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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 | |||
22 | #include "avformat.h" |
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23 | #include "internal.h" |
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24 | #include "libavutil/intreadwrite.h" |
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25 | #include "libavutil/dict.h" |
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26 | #include "libavutil/mathematics.h" |
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27 | #include "riff.h" |
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28 | |||
29 | typedef struct VqfContext { |
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30 | int frame_bit_len; |
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31 | uint8_t last_frame_bits; |
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32 | int remaining_bits; |
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33 | } VqfContext; |
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34 | |||
35 | static int vqf_probe(AVProbeData *probe_packet) |
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36 | { |
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37 | if (AV_RL32(probe_packet->buf) != MKTAG('T','W','I','N')) |
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38 | return 0; |
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39 | |||
40 | if (!memcmp(probe_packet->buf + 4, "97012000", 8)) |
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41 | return AVPROBE_SCORE_MAX; |
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42 | |||
43 | if (!memcmp(probe_packet->buf + 4, "00052200", 8)) |
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44 | return AVPROBE_SCORE_MAX; |
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45 | |||
46 | return AVPROBE_SCORE_EXTENSION; |
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47 | } |
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48 | |||
49 | static void add_metadata(AVFormatContext *s, uint32_t tag, |
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50 | unsigned int tag_len, unsigned int remaining) |
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51 | { |
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52 | int len = FFMIN(tag_len, remaining); |
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53 | char *buf, key[5] = {0}; |
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54 | |||
55 | if (len == UINT_MAX) |
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56 | return; |
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57 | |||
58 | buf = av_malloc(len+1); |
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59 | if (!buf) |
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60 | return; |
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61 | avio_read(s->pb, buf, len); |
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62 | buf[len] = 0; |
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63 | AV_WL32(key, tag); |
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64 | av_dict_set(&s->metadata, key, buf, AV_DICT_DONT_STRDUP_VAL); |
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65 | } |
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66 | |||
67 | static const AVMetadataConv vqf_metadata_conv[] = { |
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68 | { "(c) ", "copyright" }, |
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69 | { "ARNG", "arranger" }, |
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70 | { "AUTH", "author" }, |
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71 | { "BAND", "band" }, |
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72 | { "CDCT", "conductor" }, |
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73 | { "COMT", "comment" }, |
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74 | { "FILE", "filename" }, |
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75 | { "GENR", "genre" }, |
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76 | { "LABL", "publisher" }, |
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77 | { "MUSC", "composer" }, |
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78 | { "NAME", "title" }, |
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79 | { "NOTE", "note" }, |
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80 | { "PROD", "producer" }, |
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81 | { "PRSN", "personnel" }, |
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82 | { "REMX", "remixer" }, |
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83 | { "SING", "singer" }, |
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84 | { "TRCK", "track" }, |
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85 | { "WORD", "words" }, |
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86 | { 0 }, |
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87 | }; |
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88 | |||
89 | static int vqf_read_header(AVFormatContext *s) |
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90 | { |
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91 | VqfContext *c = s->priv_data; |
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92 | AVStream *st = avformat_new_stream(s, NULL); |
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93 | int chunk_tag; |
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94 | int rate_flag = -1; |
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95 | int header_size; |
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96 | int read_bitrate = 0; |
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97 | int size; |
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98 | uint8_t comm_chunk[12]; |
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99 | |||
100 | if (!st) |
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101 | return AVERROR(ENOMEM); |
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102 | |||
103 | avio_skip(s->pb, 12); |
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104 | |||
105 | header_size = avio_rb32(s->pb); |
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106 | |||
107 | st->codec->codec_type = AVMEDIA_TYPE_AUDIO; |
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108 | st->codec->codec_id = AV_CODEC_ID_TWINVQ; |
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109 | st->start_time = 0; |
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110 | |||
111 | do { |
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112 | int len; |
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113 | chunk_tag = avio_rl32(s->pb); |
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114 | |||
115 | if (chunk_tag == MKTAG('D','A','T','A')) |
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116 | break; |
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117 | |||
118 | len = avio_rb32(s->pb); |
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119 | |||
120 | if ((unsigned) len > INT_MAX/2) { |
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121 | av_log(s, AV_LOG_ERROR, "Malformed header\n"); |
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122 | return -1; |
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123 | } |
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124 | |||
125 | header_size -= 8; |
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126 | |||
127 | switch(chunk_tag){ |
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128 | case MKTAG('C','O','M','M'): |
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129 | avio_read(s->pb, comm_chunk, 12); |
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130 | st->codec->channels = AV_RB32(comm_chunk ) + 1; |
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131 | read_bitrate = AV_RB32(comm_chunk + 4); |
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132 | rate_flag = AV_RB32(comm_chunk + 8); |
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133 | avio_skip(s->pb, len-12); |
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134 | |||
135 | if (st->codec->channels <= 0) { |
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136 | av_log(s, AV_LOG_ERROR, "Invalid number of channels\n"); |
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137 | return AVERROR_INVALIDDATA; |
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138 | } |
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139 | |||
140 | st->codec->bit_rate = read_bitrate*1000; |
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141 | break; |
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142 | case MKTAG('D','S','I','Z'): // size of compressed data |
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143 | { |
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144 | char buf[8] = {0}; |
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145 | int size = avio_rb32(s->pb); |
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146 | |||
147 | snprintf(buf, sizeof(buf), "%d", size); |
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148 | av_dict_set(&s->metadata, "size", buf, 0); |
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149 | } |
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150 | break; |
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151 | case MKTAG('Y','E','A','R'): // recording date |
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152 | case MKTAG('E','N','C','D'): // compression date |
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153 | case MKTAG('E','X','T','R'): // reserved |
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154 | case MKTAG('_','Y','M','H'): // reserved |
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155 | case MKTAG('_','N','T','T'): // reserved |
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156 | case MKTAG('_','I','D','3'): // reserved for ID3 tags |
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157 | avio_skip(s->pb, FFMIN(len, header_size)); |
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158 | break; |
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159 | default: |
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160 | add_metadata(s, chunk_tag, len, header_size); |
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161 | break; |
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162 | } |
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163 | |||
164 | header_size -= len; |
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165 | |||
166 | } while (header_size >= 0 && !url_feof(s->pb)); |
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167 | |||
168 | switch (rate_flag) { |
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169 | case -1: |
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170 | av_log(s, AV_LOG_ERROR, "COMM tag not found!\n"); |
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171 | return -1; |
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172 | case 44: |
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173 | st->codec->sample_rate = 44100; |
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174 | break; |
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175 | case 22: |
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176 | st->codec->sample_rate = 22050; |
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177 | break; |
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178 | case 11: |
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179 | st->codec->sample_rate = 11025; |
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180 | break; |
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181 | default: |
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182 | if (rate_flag < 8 || rate_flag > 44) { |
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183 | av_log(s, AV_LOG_ERROR, "Invalid rate flag %d\n", rate_flag); |
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184 | return AVERROR_INVALIDDATA; |
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185 | } |
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186 | st->codec->sample_rate = rate_flag*1000; |
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187 | break; |
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188 | } |
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189 | |||
190 | if (read_bitrate / st->codec->channels < 8 || |
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191 | read_bitrate / st->codec->channels > 48) { |
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192 | av_log(s, AV_LOG_ERROR, "Invalid bitrate per channel %d\n", |
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193 | read_bitrate / st->codec->channels); |
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194 | return AVERROR_INVALIDDATA; |
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195 | } |
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196 | |||
197 | switch (((st->codec->sample_rate/1000) << 8) + |
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198 | read_bitrate/st->codec->channels) { |
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199 | case (11<<8) + 8 : |
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200 | case (8 <<8) + 8 : |
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201 | case (11<<8) + 10: |
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202 | case (22<<8) + 32: |
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203 | size = 512; |
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204 | break; |
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205 | case (16<<8) + 16: |
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206 | case (22<<8) + 20: |
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207 | case (22<<8) + 24: |
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208 | size = 1024; |
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209 | break; |
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210 | case (44<<8) + 40: |
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211 | case (44<<8) + 48: |
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212 | size = 2048; |
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213 | break; |
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214 | default: |
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215 | av_log(s, AV_LOG_ERROR, "Mode not suported: %d Hz, %d kb/s.\n", |
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216 | st->codec->sample_rate, st->codec->bit_rate); |
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217 | return -1; |
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218 | } |
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219 | c->frame_bit_len = st->codec->bit_rate*size/st->codec->sample_rate; |
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220 | avpriv_set_pts_info(st, 64, size, st->codec->sample_rate); |
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221 | |||
222 | /* put first 12 bytes of COMM chunk in extradata */ |
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223 | if (ff_alloc_extradata(st->codec, 12)) |
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224 | return AVERROR(ENOMEM); |
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225 | memcpy(st->codec->extradata, comm_chunk, 12); |
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226 | |||
227 | ff_metadata_conv_ctx(s, NULL, vqf_metadata_conv); |
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228 | |||
229 | return 0; |
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230 | } |
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231 | |||
232 | static int vqf_read_packet(AVFormatContext *s, AVPacket *pkt) |
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233 | { |
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234 | VqfContext *c = s->priv_data; |
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235 | int ret; |
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236 | int size = (c->frame_bit_len - c->remaining_bits + 7)>>3; |
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237 | |||
238 | if (av_new_packet(pkt, size+2) < 0) |
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239 | return AVERROR(EIO); |
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240 | |||
241 | pkt->pos = avio_tell(s->pb); |
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242 | pkt->stream_index = 0; |
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243 | pkt->duration = 1; |
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244 | |||
245 | pkt->data[0] = 8 - c->remaining_bits; // Number of bits to skip |
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246 | pkt->data[1] = c->last_frame_bits; |
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247 | ret = avio_read(s->pb, pkt->data+2, size); |
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248 | |||
249 | if (ret<=0) { |
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250 | av_free_packet(pkt); |
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251 | return AVERROR(EIO); |
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252 | } |
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253 | |||
254 | c->last_frame_bits = pkt->data[size+1]; |
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255 | c->remaining_bits = (size << 3) - c->frame_bit_len + c->remaining_bits; |
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256 | |||
257 | return size+2; |
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258 | } |
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259 | |||
260 | static int vqf_read_seek(AVFormatContext *s, |
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261 | int stream_index, int64_t timestamp, int flags) |
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262 | { |
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263 | VqfContext *c = s->priv_data; |
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264 | AVStream *st; |
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265 | int ret; |
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266 | int64_t pos; |
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267 | |||
268 | st = s->streams[stream_index]; |
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269 | pos = av_rescale_rnd(timestamp * st->codec->bit_rate, |
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270 | st->time_base.num, |
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271 | st->time_base.den * (int64_t)c->frame_bit_len, |
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272 | (flags & AVSEEK_FLAG_BACKWARD) ? |
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273 | AV_ROUND_DOWN : AV_ROUND_UP); |
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274 | pos *= c->frame_bit_len; |
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275 | |||
276 | st->cur_dts = av_rescale(pos, st->time_base.den, |
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277 | st->codec->bit_rate * (int64_t)st->time_base.num); |
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278 | |||
279 | if ((ret = avio_seek(s->pb, ((pos-7) >> 3) + s->data_offset, SEEK_SET)) < 0) |
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280 | return ret; |
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281 | |||
282 | c->remaining_bits = -7 - ((pos-7)&7); |
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283 | return 0; |
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284 | } |
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285 | |||
286 | AVInputFormat ff_vqf_demuxer = { |
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287 | .name = "vqf", |
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288 | .long_name = NULL_IF_CONFIG_SMALL("Nippon Telegraph and Telephone Corporation (NTT) TwinVQ"), |
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289 | .priv_data_size = sizeof(VqfContext), |
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290 | .read_probe = vqf_probe, |
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291 | .read_header = vqf_read_header, |
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292 | .read_packet = vqf_read_packet, |
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293 | .read_seek = vqf_read_seek, |
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294 | .extensions = "vqf,vql,vqe", |
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295 | };>><>=0)>>8)><8)>8)><8)>8)><8)>8)><8)>8)><8)>8)><8)>8)><8)>8)><8)>8)><8)>><>>>=> |