00001 /* 00002 * R3D REDCODE demuxer 00003 * Copyright (c) 2008 Baptiste Coudurier <baptiste dot coudurier at gmail dot com> 00004 * 00005 * This file is part of FFmpeg. 00006 * 00007 * FFmpeg is free software; you can redistribute it and/or 00008 * modify it under the terms of the GNU Lesser General Public 00009 * License as published by the Free Software Foundation; either 00010 * version 2.1 of the License, or (at your option) any later version. 00011 * 00012 * FFmpeg is distributed in the hope that it will be useful, 00013 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00015 * Lesser General Public License for more details. 00016 * 00017 * You should have received a copy of the GNU Lesser General Public 00018 * License along with FFmpeg; if not, write to the Free Software 00019 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 00020 */ 00021 00022 //#define DEBUG 00023 00024 #include "libavutil/intreadwrite.h" 00025 #include "libavutil/dict.h" 00026 #include "avformat.h" 00027 00028 typedef struct { 00029 unsigned video_offsets_count; 00030 unsigned *video_offsets; 00031 unsigned rdvo_offset; 00032 } R3DContext; 00033 00034 typedef struct { 00035 unsigned size; 00036 uint32_t tag; 00037 uint64_t offset; 00038 } Atom; 00039 00040 static int read_atom(AVFormatContext *s, Atom *atom) 00041 { 00042 atom->offset = avio_tell(s->pb); 00043 atom->size = avio_rb32(s->pb); 00044 if (atom->size < 8) 00045 return -1; 00046 atom->tag = avio_rl32(s->pb); 00047 av_dlog(s, "atom %u %.4s offset %#"PRIx64"\n", 00048 atom->size, (char*)&atom->tag, atom->offset); 00049 return atom->size; 00050 } 00051 00052 static int r3d_read_red1(AVFormatContext *s) 00053 { 00054 AVStream *st = av_new_stream(s, 0); 00055 char filename[258]; 00056 int tmp; 00057 int av_unused tmp2; 00058 00059 if (!st) 00060 return AVERROR(ENOMEM); 00061 st->codec->codec_type = AVMEDIA_TYPE_VIDEO; 00062 st->codec->codec_id = CODEC_ID_JPEG2000; 00063 00064 tmp = avio_r8(s->pb); // major version 00065 tmp2 = avio_r8(s->pb); // minor version 00066 av_dlog(s, "version %d.%d\n", tmp, tmp2); 00067 00068 tmp = avio_rb16(s->pb); // unknown 00069 av_dlog(s, "unknown1 %d\n", tmp); 00070 00071 tmp = avio_rb32(s->pb); 00072 av_set_pts_info(st, 32, 1, tmp); 00073 00074 tmp = avio_rb32(s->pb); // filenum 00075 av_dlog(s, "filenum %d\n", tmp); 00076 00077 avio_skip(s->pb, 32); // unknown 00078 00079 st->codec->width = avio_rb32(s->pb); 00080 st->codec->height = avio_rb32(s->pb); 00081 00082 tmp = avio_rb16(s->pb); // unknown 00083 av_dlog(s, "unknown2 %d\n", tmp); 00084 00085 st->codec->time_base.den = avio_rb16(s->pb); 00086 st->codec->time_base.num = avio_rb16(s->pb); 00087 00088 tmp = avio_r8(s->pb); // audio channels 00089 av_dlog(s, "audio channels %d\n", tmp); 00090 if (tmp > 0) { 00091 AVStream *ast = av_new_stream(s, 1); 00092 if (!ast) 00093 return AVERROR(ENOMEM); 00094 ast->codec->codec_type = AVMEDIA_TYPE_AUDIO; 00095 ast->codec->codec_id = CODEC_ID_PCM_S32BE; 00096 ast->codec->channels = tmp; 00097 av_set_pts_info(ast, 32, 1, st->time_base.den); 00098 } 00099 00100 avio_read(s->pb, filename, 257); 00101 filename[sizeof(filename)-1] = 0; 00102 av_dict_set(&st->metadata, "filename", filename, 0); 00103 00104 av_dlog(s, "filename %s\n", filename); 00105 av_dlog(s, "resolution %dx%d\n", st->codec->width, st->codec->height); 00106 av_dlog(s, "timescale %d\n", st->time_base.den); 00107 av_dlog(s, "frame rate %d/%d\n", 00108 st->codec->time_base.num, st->codec->time_base.den); 00109 00110 return 0; 00111 } 00112 00113 static int r3d_read_rdvo(AVFormatContext *s, Atom *atom) 00114 { 00115 R3DContext *r3d = s->priv_data; 00116 AVStream *st = s->streams[0]; 00117 int i; 00118 00119 r3d->video_offsets_count = (atom->size - 8) / 4; 00120 r3d->video_offsets = av_malloc(atom->size); 00121 if (!r3d->video_offsets) 00122 return AVERROR(ENOMEM); 00123 00124 for (i = 0; i < r3d->video_offsets_count; i++) { 00125 r3d->video_offsets[i] = avio_rb32(s->pb); 00126 if (!r3d->video_offsets[i]) { 00127 r3d->video_offsets_count = i; 00128 break; 00129 } 00130 av_dlog(s, "video offset %d: %#x\n", i, r3d->video_offsets[i]); 00131 } 00132 00133 if (st->codec->time_base.den) 00134 st->duration = (uint64_t)r3d->video_offsets_count* 00135 st->time_base.den*st->codec->time_base.num/st->codec->time_base.den; 00136 av_dlog(s, "duration %"PRId64"\n", st->duration); 00137 00138 return 0; 00139 } 00140 00141 static void r3d_read_reos(AVFormatContext *s) 00142 { 00143 R3DContext *r3d = s->priv_data; 00144 int av_unused tmp; 00145 00146 r3d->rdvo_offset = avio_rb32(s->pb); 00147 avio_rb32(s->pb); // rdvs offset 00148 avio_rb32(s->pb); // rdao offset 00149 avio_rb32(s->pb); // rdas offset 00150 00151 tmp = avio_rb32(s->pb); 00152 av_dlog(s, "num video chunks %d\n", tmp); 00153 00154 tmp = avio_rb32(s->pb); 00155 av_dlog(s, "num audio chunks %d\n", tmp); 00156 00157 avio_skip(s->pb, 6*4); 00158 } 00159 00160 static int r3d_read_header(AVFormatContext *s, AVFormatParameters *ap) 00161 { 00162 R3DContext *r3d = s->priv_data; 00163 Atom atom; 00164 int ret; 00165 00166 if (read_atom(s, &atom) < 0) { 00167 av_log(s, AV_LOG_ERROR, "error reading atom\n"); 00168 return -1; 00169 } 00170 if (atom.tag == MKTAG('R','E','D','1')) { 00171 if ((ret = r3d_read_red1(s)) < 0) { 00172 av_log(s, AV_LOG_ERROR, "error parsing 'red1' atom\n"); 00173 return ret; 00174 } 00175 } else { 00176 av_log(s, AV_LOG_ERROR, "could not find 'red1' atom\n"); 00177 return -1; 00178 } 00179 00180 s->data_offset = avio_tell(s->pb); 00181 av_dlog(s, "data offset %#"PRIx64"\n", s->data_offset); 00182 if (!s->pb->seekable) 00183 return 0; 00184 // find REOB/REOF/REOS to load index 00185 avio_seek(s->pb, avio_size(s->pb)-48-8, SEEK_SET); 00186 if (read_atom(s, &atom) < 0) 00187 av_log(s, AV_LOG_ERROR, "error reading end atom\n"); 00188 00189 if (atom.tag != MKTAG('R','E','O','B') && 00190 atom.tag != MKTAG('R','E','O','F') && 00191 atom.tag != MKTAG('R','E','O','S')) 00192 goto out; 00193 00194 r3d_read_reos(s); 00195 00196 if (r3d->rdvo_offset) { 00197 avio_seek(s->pb, r3d->rdvo_offset, SEEK_SET); 00198 if (read_atom(s, &atom) < 0) 00199 av_log(s, AV_LOG_ERROR, "error reading 'rdvo' atom\n"); 00200 if (atom.tag == MKTAG('R','D','V','O')) { 00201 if (r3d_read_rdvo(s, &atom) < 0) 00202 av_log(s, AV_LOG_ERROR, "error parsing 'rdvo' atom\n"); 00203 } 00204 } 00205 00206 out: 00207 avio_seek(s->pb, s->data_offset, SEEK_SET); 00208 return 0; 00209 } 00210 00211 static int r3d_read_redv(AVFormatContext *s, AVPacket *pkt, Atom *atom) 00212 { 00213 AVStream *st = s->streams[0]; 00214 int tmp; 00215 int av_unused tmp2; 00216 uint64_t pos = avio_tell(s->pb); 00217 unsigned dts; 00218 int ret; 00219 00220 dts = avio_rb32(s->pb); 00221 00222 tmp = avio_rb32(s->pb); 00223 av_dlog(s, "frame num %d\n", tmp); 00224 00225 tmp = avio_r8(s->pb); // major version 00226 tmp2 = avio_r8(s->pb); // minor version 00227 av_dlog(s, "version %d.%d\n", tmp, tmp2); 00228 00229 tmp = avio_rb16(s->pb); // unknown 00230 av_dlog(s, "unknown %d\n", tmp); 00231 00232 if (tmp > 4) { 00233 tmp = avio_rb16(s->pb); // unknown 00234 av_dlog(s, "unknown %d\n", tmp); 00235 00236 tmp = avio_rb16(s->pb); // unknown 00237 av_dlog(s, "unknown %d\n", tmp); 00238 00239 tmp = avio_rb32(s->pb); 00240 av_dlog(s, "width %d\n", tmp); 00241 tmp = avio_rb32(s->pb); 00242 av_dlog(s, "height %d\n", tmp); 00243 00244 tmp = avio_rb32(s->pb); 00245 av_dlog(s, "metadata len %d\n", tmp); 00246 } 00247 tmp = atom->size - 8 - (avio_tell(s->pb) - pos); 00248 if (tmp < 0) 00249 return -1; 00250 ret = av_get_packet(s->pb, pkt, tmp); 00251 if (ret < 0) { 00252 av_log(s, AV_LOG_ERROR, "error reading video packet\n"); 00253 return -1; 00254 } 00255 00256 pkt->stream_index = 0; 00257 pkt->dts = dts; 00258 if (st->codec->time_base.den) 00259 pkt->duration = (uint64_t)st->time_base.den* 00260 st->codec->time_base.num/st->codec->time_base.den; 00261 av_dlog(s, "pkt dts %"PRId64" duration %d\n", pkt->dts, pkt->duration); 00262 00263 return 0; 00264 } 00265 00266 static int r3d_read_reda(AVFormatContext *s, AVPacket *pkt, Atom *atom) 00267 { 00268 AVStream *st = s->streams[1]; 00269 int av_unused tmp, tmp2; 00270 int samples, size; 00271 uint64_t pos = avio_tell(s->pb); 00272 unsigned dts; 00273 int ret; 00274 00275 dts = avio_rb32(s->pb); 00276 00277 st->codec->sample_rate = avio_rb32(s->pb); 00278 00279 samples = avio_rb32(s->pb); 00280 00281 tmp = avio_rb32(s->pb); 00282 av_dlog(s, "packet num %d\n", tmp); 00283 00284 tmp = avio_rb16(s->pb); // unkown 00285 av_dlog(s, "unknown %d\n", tmp); 00286 00287 tmp = avio_r8(s->pb); // major version 00288 tmp2 = avio_r8(s->pb); // minor version 00289 av_dlog(s, "version %d.%d\n", tmp, tmp2); 00290 00291 tmp = avio_rb32(s->pb); // unknown 00292 av_dlog(s, "unknown %d\n", tmp); 00293 00294 size = atom->size - 8 - (avio_tell(s->pb) - pos); 00295 if (size < 0) 00296 return -1; 00297 ret = av_get_packet(s->pb, pkt, size); 00298 if (ret < 0) { 00299 av_log(s, AV_LOG_ERROR, "error reading audio packet\n"); 00300 return ret; 00301 } 00302 00303 pkt->stream_index = 1; 00304 pkt->dts = dts; 00305 pkt->duration = av_rescale(samples, st->time_base.den, st->codec->sample_rate); 00306 av_dlog(s, "pkt dts %"PRId64" duration %d samples %d sample rate %d\n", 00307 pkt->dts, pkt->duration, samples, st->codec->sample_rate); 00308 00309 return 0; 00310 } 00311 00312 static int r3d_read_packet(AVFormatContext *s, AVPacket *pkt) 00313 { 00314 Atom atom; 00315 int err = 0; 00316 00317 while (!err) { 00318 if (read_atom(s, &atom) < 0) { 00319 err = -1; 00320 break; 00321 } 00322 switch (atom.tag) { 00323 case MKTAG('R','E','D','V'): 00324 if (s->streams[0]->discard == AVDISCARD_ALL) 00325 goto skip; 00326 if (!(err = r3d_read_redv(s, pkt, &atom))) 00327 return 0; 00328 break; 00329 case MKTAG('R','E','D','A'): 00330 if (s->nb_streams < 2) 00331 return -1; 00332 if (s->streams[1]->discard == AVDISCARD_ALL) 00333 goto skip; 00334 if (!(err = r3d_read_reda(s, pkt, &atom))) 00335 return 0; 00336 break; 00337 default: 00338 skip: 00339 avio_skip(s->pb, atom.size-8); 00340 } 00341 } 00342 return err; 00343 } 00344 00345 static int r3d_probe(AVProbeData *p) 00346 { 00347 if (AV_RL32(p->buf + 4) == MKTAG('R','E','D','1')) 00348 return AVPROBE_SCORE_MAX; 00349 return 0; 00350 } 00351 00352 static int r3d_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags) 00353 { 00354 AVStream *st = s->streams[0]; // video stream 00355 R3DContext *r3d = s->priv_data; 00356 int frame_num; 00357 00358 if (!st->codec->time_base.num || !st->time_base.den) 00359 return -1; 00360 00361 frame_num = sample_time*st->codec->time_base.den/ 00362 ((int64_t)st->codec->time_base.num*st->time_base.den); 00363 av_dlog(s, "seek frame num %d timestamp %"PRId64"\n", 00364 frame_num, sample_time); 00365 00366 if (frame_num < r3d->video_offsets_count) { 00367 avio_seek(s->pb, r3d->video_offsets_count, SEEK_SET); 00368 } else { 00369 av_log(s, AV_LOG_ERROR, "could not seek to frame %d\n", frame_num); 00370 return -1; 00371 } 00372 00373 return 0; 00374 } 00375 00376 static int r3d_close(AVFormatContext *s) 00377 { 00378 R3DContext *r3d = s->priv_data; 00379 00380 av_freep(&r3d->video_offsets); 00381 00382 return 0; 00383 } 00384 00385 AVInputFormat ff_r3d_demuxer = { 00386 "r3d", 00387 NULL_IF_CONFIG_SMALL("REDCODE R3D format"), 00388 sizeof(R3DContext), 00389 r3d_probe, 00390 r3d_read_header, 00391 r3d_read_packet, 00392 r3d_close, 00393 r3d_seek, 00394 };