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4349 | Serge | 1 | /* |
2 | * R3D REDCODE demuxer |
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3 | * Copyright (c) 2008 Baptiste Coudurier |
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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 "libavutil/intreadwrite.h" |
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23 | #include "libavutil/dict.h" |
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24 | #include "libavutil/mathematics.h" |
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25 | #include "avformat.h" |
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26 | #include "internal.h" |
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27 | |||
28 | typedef struct { |
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29 | unsigned video_offsets_count; |
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30 | unsigned *video_offsets; |
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31 | unsigned rdvo_offset; |
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32 | } R3DContext; |
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33 | |||
34 | typedef struct { |
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35 | unsigned size; |
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36 | uint32_t tag; |
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37 | uint64_t offset; |
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38 | } Atom; |
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39 | |||
40 | static int read_atom(AVFormatContext *s, Atom *atom) |
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41 | { |
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42 | atom->offset = avio_tell(s->pb); |
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43 | atom->size = avio_rb32(s->pb); |
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44 | if (atom->size < 8) |
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45 | return -1; |
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46 | atom->tag = avio_rl32(s->pb); |
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47 | av_dlog(s, "atom %u %.4s offset %#"PRIx64"\n", |
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48 | atom->size, (char*)&atom->tag, atom->offset); |
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49 | return atom->size; |
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50 | } |
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51 | |||
52 | static int r3d_read_red1(AVFormatContext *s) |
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53 | { |
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54 | AVStream *st = avformat_new_stream(s, NULL); |
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55 | char filename[258]; |
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56 | int tmp; |
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57 | int av_unused tmp2; |
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58 | AVRational framerate; |
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59 | |||
60 | if (!st) |
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61 | return AVERROR(ENOMEM); |
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62 | st->codec->codec_type = AVMEDIA_TYPE_VIDEO; |
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63 | st->codec->codec_id = AV_CODEC_ID_JPEG2000; |
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64 | |||
65 | tmp = avio_r8(s->pb); // major version |
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66 | tmp2 = avio_r8(s->pb); // minor version |
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67 | av_dlog(s, "version %d.%d\n", tmp, tmp2); |
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68 | |||
69 | tmp = avio_rb16(s->pb); // unknown |
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70 | av_dlog(s, "unknown1 %d\n", tmp); |
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71 | |||
72 | tmp = avio_rb32(s->pb); |
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73 | avpriv_set_pts_info(st, 32, 1, tmp); |
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74 | |||
75 | tmp = avio_rb32(s->pb); // filenum |
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76 | av_dlog(s, "filenum %d\n", tmp); |
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77 | |||
78 | avio_skip(s->pb, 32); // unknown |
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79 | |||
80 | st->codec->width = avio_rb32(s->pb); |
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81 | st->codec->height = avio_rb32(s->pb); |
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82 | |||
83 | tmp = avio_rb16(s->pb); // unknown |
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84 | av_dlog(s, "unknown2 %d\n", tmp); |
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85 | |||
86 | framerate.num = avio_rb16(s->pb); |
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87 | framerate.den = avio_rb16(s->pb); |
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88 | if (framerate.num > 0 && framerate.den > 0) { |
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89 | #if FF_API_R_FRAME_RATE |
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90 | st->r_frame_rate = |
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91 | #endif |
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92 | st->avg_frame_rate = framerate; |
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93 | } |
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94 | |||
95 | tmp = avio_r8(s->pb); // audio channels |
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96 | av_dlog(s, "audio channels %d\n", tmp); |
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97 | if (tmp > 0) { |
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98 | AVStream *ast = avformat_new_stream(s, NULL); |
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99 | if (!ast) |
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100 | return AVERROR(ENOMEM); |
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101 | ast->codec->codec_type = AVMEDIA_TYPE_AUDIO; |
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102 | ast->codec->codec_id = AV_CODEC_ID_PCM_S32BE; |
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103 | ast->codec->channels = tmp; |
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104 | avpriv_set_pts_info(ast, 32, 1, st->time_base.den); |
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105 | } |
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106 | |||
107 | avio_read(s->pb, filename, 257); |
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108 | filename[sizeof(filename)-1] = 0; |
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109 | av_dict_set(&st->metadata, "filename", filename, 0); |
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110 | |||
111 | av_dlog(s, "filename %s\n", filename); |
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112 | av_dlog(s, "resolution %dx%d\n", st->codec->width, st->codec->height); |
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113 | av_dlog(s, "timescale %d\n", st->time_base.den); |
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114 | av_dlog(s, "frame rate %d/%d\n", |
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115 | framerate.num, framerate.den); |
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116 | |||
117 | return 0; |
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118 | } |
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119 | |||
120 | static int r3d_read_rdvo(AVFormatContext *s, Atom *atom) |
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121 | { |
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122 | R3DContext *r3d = s->priv_data; |
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123 | AVStream *st = s->streams[0]; |
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124 | int i; |
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125 | |||
126 | r3d->video_offsets_count = (atom->size - 8) / 4; |
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127 | r3d->video_offsets = av_malloc(atom->size); |
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128 | if (!r3d->video_offsets) |
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129 | return AVERROR(ENOMEM); |
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130 | |||
131 | for (i = 0; i < r3d->video_offsets_count; i++) { |
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132 | r3d->video_offsets[i] = avio_rb32(s->pb); |
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133 | if (!r3d->video_offsets[i]) { |
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134 | r3d->video_offsets_count = i; |
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135 | break; |
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136 | } |
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137 | av_dlog(s, "video offset %d: %#x\n", i, r3d->video_offsets[i]); |
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138 | } |
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139 | |||
140 | if (st->avg_frame_rate.num) |
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141 | st->duration = av_rescale_q(r3d->video_offsets_count, |
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142 | av_inv_q(st->avg_frame_rate), |
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143 | st->time_base); |
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144 | av_dlog(s, "duration %"PRId64"\n", st->duration); |
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145 | |||
146 | return 0; |
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147 | } |
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148 | |||
149 | static void r3d_read_reos(AVFormatContext *s) |
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150 | { |
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151 | R3DContext *r3d = s->priv_data; |
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152 | int av_unused tmp; |
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153 | |||
154 | r3d->rdvo_offset = avio_rb32(s->pb); |
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155 | avio_rb32(s->pb); // rdvs offset |
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156 | avio_rb32(s->pb); // rdao offset |
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157 | avio_rb32(s->pb); // rdas offset |
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158 | |||
159 | tmp = avio_rb32(s->pb); |
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160 | av_dlog(s, "num video chunks %d\n", tmp); |
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161 | |||
162 | tmp = avio_rb32(s->pb); |
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163 | av_dlog(s, "num audio chunks %d\n", tmp); |
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164 | |||
165 | avio_skip(s->pb, 6*4); |
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166 | } |
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167 | |||
168 | static int r3d_read_header(AVFormatContext *s) |
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169 | { |
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170 | R3DContext *r3d = s->priv_data; |
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171 | Atom atom; |
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172 | int ret; |
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173 | |||
174 | if (read_atom(s, &atom) < 0) { |
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175 | av_log(s, AV_LOG_ERROR, "error reading atom\n"); |
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176 | return -1; |
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177 | } |
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178 | if (atom.tag == MKTAG('R','E','D','1')) { |
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179 | if ((ret = r3d_read_red1(s)) < 0) { |
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180 | av_log(s, AV_LOG_ERROR, "error parsing 'red1' atom\n"); |
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181 | return ret; |
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182 | } |
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183 | } else { |
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184 | av_log(s, AV_LOG_ERROR, "could not find 'red1' atom\n"); |
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185 | return -1; |
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186 | } |
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187 | |||
188 | s->data_offset = avio_tell(s->pb); |
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189 | av_dlog(s, "data offset %#"PRIx64"\n", s->data_offset); |
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190 | if (!s->pb->seekable) |
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191 | return 0; |
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192 | // find REOB/REOF/REOS to load index |
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193 | avio_seek(s->pb, avio_size(s->pb)-48-8, SEEK_SET); |
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194 | if (read_atom(s, &atom) < 0) |
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195 | av_log(s, AV_LOG_ERROR, "error reading end atom\n"); |
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196 | |||
197 | if (atom.tag != MKTAG('R','E','O','B') && |
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198 | atom.tag != MKTAG('R','E','O','F') && |
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199 | atom.tag != MKTAG('R','E','O','S')) |
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200 | goto out; |
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201 | |||
202 | r3d_read_reos(s); |
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203 | |||
204 | if (r3d->rdvo_offset) { |
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205 | avio_seek(s->pb, r3d->rdvo_offset, SEEK_SET); |
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206 | if (read_atom(s, &atom) < 0) |
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207 | av_log(s, AV_LOG_ERROR, "error reading 'rdvo' atom\n"); |
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208 | if (atom.tag == MKTAG('R','D','V','O')) { |
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209 | if (r3d_read_rdvo(s, &atom) < 0) |
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210 | av_log(s, AV_LOG_ERROR, "error parsing 'rdvo' atom\n"); |
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211 | } |
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212 | } |
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213 | |||
214 | out: |
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215 | avio_seek(s->pb, s->data_offset, SEEK_SET); |
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216 | return 0; |
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217 | } |
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218 | |||
219 | static int r3d_read_redv(AVFormatContext *s, AVPacket *pkt, Atom *atom) |
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220 | { |
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221 | AVStream *st = s->streams[0]; |
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222 | int tmp; |
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223 | int av_unused tmp2; |
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224 | uint64_t pos = avio_tell(s->pb); |
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225 | unsigned dts; |
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226 | int ret; |
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227 | |||
228 | dts = avio_rb32(s->pb); |
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229 | |||
230 | tmp = avio_rb32(s->pb); |
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231 | av_dlog(s, "frame num %d\n", tmp); |
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232 | |||
233 | tmp = avio_r8(s->pb); // major version |
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234 | tmp2 = avio_r8(s->pb); // minor version |
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235 | av_dlog(s, "version %d.%d\n", tmp, tmp2); |
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236 | |||
237 | tmp = avio_rb16(s->pb); // unknown |
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238 | av_dlog(s, "unknown %d\n", tmp); |
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239 | |||
240 | if (tmp > 4) { |
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241 | tmp = avio_rb16(s->pb); // unknown |
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242 | av_dlog(s, "unknown %d\n", tmp); |
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243 | |||
244 | tmp = avio_rb16(s->pb); // unknown |
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245 | av_dlog(s, "unknown %d\n", tmp); |
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246 | |||
247 | tmp = avio_rb32(s->pb); |
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248 | av_dlog(s, "width %d\n", tmp); |
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249 | tmp = avio_rb32(s->pb); |
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250 | av_dlog(s, "height %d\n", tmp); |
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251 | |||
252 | tmp = avio_rb32(s->pb); |
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253 | av_dlog(s, "metadata len %d\n", tmp); |
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254 | } |
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255 | tmp = atom->size - 8 - (avio_tell(s->pb) - pos); |
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256 | if (tmp < 0) |
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257 | return -1; |
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258 | ret = av_get_packet(s->pb, pkt, tmp); |
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259 | if (ret < 0) { |
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260 | av_log(s, AV_LOG_ERROR, "error reading video packet\n"); |
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261 | return -1; |
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262 | } |
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263 | |||
264 | pkt->stream_index = 0; |
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265 | pkt->dts = dts; |
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266 | if (st->avg_frame_rate.num) |
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267 | pkt->duration = (uint64_t)st->time_base.den* |
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268 | st->avg_frame_rate.den/st->avg_frame_rate.num; |
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269 | av_dlog(s, "pkt dts %"PRId64" duration %d\n", pkt->dts, pkt->duration); |
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270 | |||
271 | return 0; |
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272 | } |
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273 | |||
274 | static int r3d_read_reda(AVFormatContext *s, AVPacket *pkt, Atom *atom) |
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275 | { |
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276 | AVStream *st = s->streams[1]; |
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277 | int av_unused tmp, tmp2; |
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278 | int samples, size; |
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279 | uint64_t pos = avio_tell(s->pb); |
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280 | unsigned dts; |
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281 | int ret; |
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282 | |||
283 | dts = avio_rb32(s->pb); |
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284 | |||
285 | st->codec->sample_rate = avio_rb32(s->pb); |
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286 | if (st->codec->sample_rate <= 0) { |
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287 | av_log(s, AV_LOG_ERROR, "Bad sample rate\n"); |
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288 | return AVERROR_INVALIDDATA; |
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289 | } |
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290 | |||
291 | samples = avio_rb32(s->pb); |
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292 | |||
293 | tmp = avio_rb32(s->pb); |
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294 | av_dlog(s, "packet num %d\n", tmp); |
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295 | |||
296 | tmp = avio_rb16(s->pb); // unknown |
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297 | av_dlog(s, "unknown %d\n", tmp); |
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298 | |||
299 | tmp = avio_r8(s->pb); // major version |
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300 | tmp2 = avio_r8(s->pb); // minor version |
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301 | av_dlog(s, "version %d.%d\n", tmp, tmp2); |
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302 | |||
303 | tmp = avio_rb32(s->pb); // unknown |
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304 | av_dlog(s, "unknown %d\n", tmp); |
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305 | |||
306 | size = atom->size - 8 - (avio_tell(s->pb) - pos); |
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307 | if (size < 0) |
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308 | return -1; |
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309 | ret = av_get_packet(s->pb, pkt, size); |
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310 | if (ret < 0) { |
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311 | av_log(s, AV_LOG_ERROR, "error reading audio packet\n"); |
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312 | return ret; |
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313 | } |
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314 | |||
315 | pkt->stream_index = 1; |
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316 | pkt->dts = dts; |
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317 | if (st->codec->sample_rate) |
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318 | pkt->duration = av_rescale(samples, st->time_base.den, st->codec->sample_rate); |
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319 | av_dlog(s, "pkt dts %"PRId64" duration %d samples %d sample rate %d\n", |
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320 | pkt->dts, pkt->duration, samples, st->codec->sample_rate); |
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321 | |||
322 | return 0; |
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323 | } |
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324 | |||
325 | static int r3d_read_packet(AVFormatContext *s, AVPacket *pkt) |
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326 | { |
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327 | Atom atom; |
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328 | int err = 0; |
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329 | |||
330 | while (!err) { |
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331 | if (read_atom(s, &atom) < 0) { |
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332 | err = -1; |
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333 | break; |
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334 | } |
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335 | switch (atom.tag) { |
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336 | case MKTAG('R','E','D','V'): |
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337 | if (s->streams[0]->discard == AVDISCARD_ALL) |
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338 | goto skip; |
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339 | if (!(err = r3d_read_redv(s, pkt, &atom))) |
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340 | return 0; |
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341 | break; |
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342 | case MKTAG('R','E','D','A'): |
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343 | if (s->nb_streams < 2) |
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344 | return -1; |
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345 | if (s->streams[1]->discard == AVDISCARD_ALL) |
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346 | goto skip; |
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347 | if (!(err = r3d_read_reda(s, pkt, &atom))) |
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348 | return 0; |
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349 | break; |
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350 | default: |
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351 | skip: |
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352 | avio_skip(s->pb, atom.size-8); |
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353 | } |
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354 | } |
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355 | return err; |
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356 | } |
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357 | |||
358 | static int r3d_probe(AVProbeData *p) |
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359 | { |
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360 | if (AV_RL32(p->buf + 4) == MKTAG('R','E','D','1')) |
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361 | return AVPROBE_SCORE_MAX; |
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362 | return 0; |
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363 | } |
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364 | |||
365 | static int r3d_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags) |
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366 | { |
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367 | AVStream *st = s->streams[0]; // video stream |
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368 | R3DContext *r3d = s->priv_data; |
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369 | int frame_num; |
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370 | |||
371 | if (!st->avg_frame_rate.num) |
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372 | return -1; |
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373 | |||
374 | frame_num = av_rescale_q(sample_time, st->time_base, |
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375 | av_inv_q(st->avg_frame_rate)); |
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376 | av_dlog(s, "seek frame num %d timestamp %"PRId64"\n", |
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377 | frame_num, sample_time); |
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378 | |||
379 | if (frame_num < r3d->video_offsets_count) { |
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380 | if (avio_seek(s->pb, r3d->video_offsets_count, SEEK_SET) < 0) |
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381 | return -1; |
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382 | } else { |
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383 | av_log(s, AV_LOG_ERROR, "could not seek to frame %d\n", frame_num); |
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384 | return -1; |
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385 | } |
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386 | |||
387 | return 0; |
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388 | } |
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389 | |||
390 | static int r3d_close(AVFormatContext *s) |
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391 | { |
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392 | R3DContext *r3d = s->priv_data; |
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393 | |||
394 | av_freep(&r3d->video_offsets); |
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395 | |||
396 | return 0; |
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397 | } |
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398 | |||
399 | AVInputFormat ff_r3d_demuxer = { |
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400 | .name = "r3d", |
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401 | .long_name = NULL_IF_CONFIG_SMALL("REDCODE R3D"), |
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402 | .priv_data_size = sizeof(R3DContext), |
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403 | .read_probe = r3d_probe, |
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404 | .read_header = r3d_read_header, |
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405 | .read_packet = r3d_read_packet, |
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406 | .read_close = r3d_close, |
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407 | .read_seek = r3d_seek, |
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408 | };>>>>>>=>>>>>>>>>> |