| 1 | /* |
| 2 | * FLV demuxer |
| 3 | * Copyright (c) 2003 The FFmpeg Project |
| 4 | * |
| 5 | * This demuxer will generate a 1 byte extradata for VP6F content. |
| 6 | * It is composed of: |
| 7 | * - upper 4bits: difference between encoded width and visible width |
| 8 | * - lower 4bits: difference between encoded height and visible height |
| 9 | * |
| 10 | * This file is part of FFmpeg. |
| 11 | * |
| 12 | * FFmpeg is free software; you can redistribute it and/or |
| 13 | * modify it under the terms of the GNU Lesser General Public |
| 14 | * License as published by the Free Software Foundation; either |
| 15 | * version 2.1 of the License, or (at your option) any later version. |
| 16 | * |
| 17 | * FFmpeg is distributed in the hope that it will be useful, |
| 18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 20 | * Lesser General Public License for more details. |
| 21 | * |
| 22 | * You should have received a copy of the GNU Lesser General Public |
| 23 | * License along with FFmpeg; if not, write to the Free Software |
| 24 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 25 | */ |
| 26 | |
| 27 | #include "libavutil/avstring.h" |
| 28 | #include "libavutil/channel_layout.h" |
| 29 | #include "libavutil/dict.h" |
| 30 | #include "libavutil/opt.h" |
| 31 | #include "libavutil/intfloat.h" |
| 32 | #include "libavutil/mathematics.h" |
| 33 | #include "libavcodec/bytestream.h" |
| 34 | #include "libavcodec/mpeg4audio.h" |
| 35 | #include "avformat.h" |
| 36 | #include "internal.h" |
| 37 | #include "avio_internal.h" |
| 38 | #include "flv.h" |
| 39 | |
| 40 | #define VALIDATE_INDEX_TS_THRESH 2500 |
| 41 | |
| 42 | typedef struct { |
| 43 | const AVClass *class; ///< Class for private options. |
| 44 | int trust_metadata; ///< configure streams according onMetaData |
| 45 | int wrong_dts; ///< wrong dts due to negative cts |
| 46 | uint8_t *new_extradata[FLV_STREAM_TYPE_NB]; |
| 47 | int new_extradata_size[FLV_STREAM_TYPE_NB]; |
| 48 | int last_sample_rate; |
| 49 | int last_channels; |
| 50 | struct { |
| 51 | int64_t dts; |
| 52 | int64_t pos; |
| 53 | } validate_index[2]; |
| 54 | int validate_next; |
| 55 | int validate_count; |
| 56 | int searched_for_end; |
| 57 | } FLVContext; |
| 58 | |
| 59 | static int probe(AVProbeData *p, int live) |
| 60 | { |
| 61 | const uint8_t *d = p->buf; |
| 62 | unsigned offset = AV_RB32(d + 5); |
| 63 | |
| 64 | if (d[0] == 'F' && |
| 65 | d[1] == 'L' && |
| 66 | d[2] == 'V' && |
| 67 | d[3] < 5 && d[5] == 0 && |
| 68 | offset + 100 < p->buf_size && |
| 69 | offset > 8) { |
| 70 | int is_live = !memcmp(d + offset + 40, "NGINX RTMP", 10); |
| 71 | |
| 72 | if (live == is_live) |
| 73 | return AVPROBE_SCORE_MAX; |
| 74 | } |
| 75 | return 0; |
| 76 | } |
| 77 | |
| 78 | static int flv_probe(AVProbeData *p) |
| 79 | { |
| 80 | return probe(p, 0); |
| 81 | } |
| 82 | |
| 83 | static int live_flv_probe(AVProbeData *p) |
| 84 | { |
| 85 | return probe(p, 1); |
| 86 | } |
| 87 | |
| 88 | static AVStream *create_stream(AVFormatContext *s, int codec_type) |
| 89 | { |
| 90 | AVStream *st = avformat_new_stream(s, NULL); |
| 91 | if (!st) |
| 92 | return NULL; |
| 93 | st->codec->codec_type = codec_type; |
| 94 | if (s->nb_streams>=3 ||( s->nb_streams==2 |
| 95 | && s->streams[0]->codec->codec_type != AVMEDIA_TYPE_DATA |
| 96 | && s->streams[1]->codec->codec_type != AVMEDIA_TYPE_DATA)) |
| 97 | s->ctx_flags &= ~AVFMTCTX_NOHEADER; |
| 98 | |
| 99 | avpriv_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */ |
| 100 | return st; |
| 101 | } |
| 102 | |
| 103 | static int flv_same_audio_codec(AVCodecContext *acodec, int flags) |
| 104 | { |
| 105 | int bits_per_coded_sample = (flags & FLV_AUDIO_SAMPLESIZE_MASK) ? 16 : 8; |
| 106 | int flv_codecid = flags & FLV_AUDIO_CODECID_MASK; |
| 107 | int codec_id; |
| 108 | |
| 109 | if (!acodec->codec_id && !acodec->codec_tag) |
| 110 | return 1; |
| 111 | |
| 112 | if (acodec->bits_per_coded_sample != bits_per_coded_sample) |
| 113 | return 0; |
| 114 | |
| 115 | switch (flv_codecid) { |
| 116 | // no distinction between S16 and S8 PCM codec flags |
| 117 | case FLV_CODECID_PCM: |
| 118 | codec_id = bits_per_coded_sample == 8 |
| 119 | ? AV_CODEC_ID_PCM_U8 |
| 120 | #if HAVE_BIGENDIAN |
| 121 | : AV_CODEC_ID_PCM_S16BE; |
| 122 | #else |
| 123 | : AV_CODEC_ID_PCM_S16LE; |
| 124 | #endif |
| 125 | return codec_id == acodec->codec_id; |
| 126 | case FLV_CODECID_PCM_LE: |
| 127 | codec_id = bits_per_coded_sample == 8 |
| 128 | ? AV_CODEC_ID_PCM_U8 |
| 129 | : AV_CODEC_ID_PCM_S16LE; |
| 130 | return codec_id == acodec->codec_id; |
| 131 | case FLV_CODECID_AAC: |
| 132 | return acodec->codec_id == AV_CODEC_ID_AAC; |
| 133 | case FLV_CODECID_ADPCM: |
| 134 | return acodec->codec_id == AV_CODEC_ID_ADPCM_SWF; |
| 135 | case FLV_CODECID_SPEEX: |
| 136 | return acodec->codec_id == AV_CODEC_ID_SPEEX; |
| 137 | case FLV_CODECID_MP3: |
| 138 | return acodec->codec_id == AV_CODEC_ID_MP3; |
| 139 | case FLV_CODECID_NELLYMOSER_8KHZ_MONO: |
| 140 | case FLV_CODECID_NELLYMOSER_16KHZ_MONO: |
| 141 | case FLV_CODECID_NELLYMOSER: |
| 142 | return acodec->codec_id == AV_CODEC_ID_NELLYMOSER; |
| 143 | case FLV_CODECID_PCM_MULAW: |
| 144 | return acodec->sample_rate == 8000 && |
| 145 | acodec->codec_id == AV_CODEC_ID_PCM_MULAW; |
| 146 | case FLV_CODECID_PCM_ALAW: |
| 147 | return acodec->sample_rate == 8000 && |
| 148 | acodec->codec_id == AV_CODEC_ID_PCM_ALAW; |
| 149 | default: |
| 150 | return acodec->codec_tag == (flv_codecid >> FLV_AUDIO_CODECID_OFFSET); |
| 151 | } |
| 152 | } |
| 153 | |
| 154 | static void flv_set_audio_codec(AVFormatContext *s, AVStream *astream, |
| 155 | AVCodecContext *acodec, int flv_codecid) |
| 156 | { |
| 157 | switch (flv_codecid) { |
| 158 | // no distinction between S16 and S8 PCM codec flags |
| 159 | case FLV_CODECID_PCM: |
| 160 | acodec->codec_id = acodec->bits_per_coded_sample == 8 |
| 161 | ? AV_CODEC_ID_PCM_U8 |
| 162 | #if HAVE_BIGENDIAN |
| 163 | : AV_CODEC_ID_PCM_S16BE; |
| 164 | #else |
| 165 | : AV_CODEC_ID_PCM_S16LE; |
| 166 | #endif |
| 167 | break; |
| 168 | case FLV_CODECID_PCM_LE: |
| 169 | acodec->codec_id = acodec->bits_per_coded_sample == 8 |
| 170 | ? AV_CODEC_ID_PCM_U8 |
| 171 | : AV_CODEC_ID_PCM_S16LE; |
| 172 | break; |
| 173 | case FLV_CODECID_AAC: |
| 174 | acodec->codec_id = AV_CODEC_ID_AAC; |
| 175 | break; |
| 176 | case FLV_CODECID_ADPCM: |
| 177 | acodec->codec_id = AV_CODEC_ID_ADPCM_SWF; |
| 178 | break; |
| 179 | case FLV_CODECID_SPEEX: |
| 180 | acodec->codec_id = AV_CODEC_ID_SPEEX; |
| 181 | acodec->sample_rate = 16000; |
| 182 | break; |
| 183 | case FLV_CODECID_MP3: |
| 184 | acodec->codec_id = AV_CODEC_ID_MP3; |
| 185 | astream->need_parsing = AVSTREAM_PARSE_FULL; |
| 186 | break; |
| 187 | case FLV_CODECID_NELLYMOSER_8KHZ_MONO: |
| 188 | // in case metadata does not otherwise declare samplerate |
| 189 | acodec->sample_rate = 8000; |
| 190 | acodec->codec_id = AV_CODEC_ID_NELLYMOSER; |
| 191 | break; |
| 192 | case FLV_CODECID_NELLYMOSER_16KHZ_MONO: |
| 193 | acodec->sample_rate = 16000; |
| 194 | acodec->codec_id = AV_CODEC_ID_NELLYMOSER; |
| 195 | break; |
| 196 | case FLV_CODECID_NELLYMOSER: |
| 197 | acodec->codec_id = AV_CODEC_ID_NELLYMOSER; |
| 198 | break; |
| 199 | case FLV_CODECID_PCM_MULAW: |
| 200 | acodec->sample_rate = 8000; |
| 201 | acodec->codec_id = AV_CODEC_ID_PCM_MULAW; |
| 202 | break; |
| 203 | case FLV_CODECID_PCM_ALAW: |
| 204 | acodec->sample_rate = 8000; |
| 205 | acodec->codec_id = AV_CODEC_ID_PCM_ALAW; |
| 206 | break; |
| 207 | default: |
| 208 | avpriv_request_sample(s, "Audio codec (%x)", |
| 209 | flv_codecid >> FLV_AUDIO_CODECID_OFFSET); |
| 210 | acodec->codec_tag = flv_codecid >> FLV_AUDIO_CODECID_OFFSET; |
| 211 | } |
| 212 | } |
| 213 | |
| 214 | static int flv_same_video_codec(AVCodecContext *vcodec, int flags) |
| 215 | { |
| 216 | int flv_codecid = flags & FLV_VIDEO_CODECID_MASK; |
| 217 | |
| 218 | if (!vcodec->codec_id && !vcodec->codec_tag) |
| 219 | return 1; |
| 220 | |
| 221 | switch (flv_codecid) { |
| 222 | case FLV_CODECID_H263: |
| 223 | return vcodec->codec_id == AV_CODEC_ID_FLV1; |
| 224 | case FLV_CODECID_SCREEN: |
| 225 | return vcodec->codec_id == AV_CODEC_ID_FLASHSV; |
| 226 | case FLV_CODECID_SCREEN2: |
| 227 | return vcodec->codec_id == AV_CODEC_ID_FLASHSV2; |
| 228 | case FLV_CODECID_VP6: |
| 229 | return vcodec->codec_id == AV_CODEC_ID_VP6F; |
| 230 | case FLV_CODECID_VP6A: |
| 231 | return vcodec->codec_id == AV_CODEC_ID_VP6A; |
| 232 | case FLV_CODECID_H264: |
| 233 | return vcodec->codec_id == AV_CODEC_ID_H264; |
| 234 | default: |
| 235 | return vcodec->codec_tag == flv_codecid; |
| 236 | } |
| 237 | } |
| 238 | |
| 239 | static int flv_set_video_codec(AVFormatContext *s, AVStream *vstream, |
| 240 | int flv_codecid, int read) |
| 241 | { |
| 242 | AVCodecContext *vcodec = vstream->codec; |
| 243 | switch (flv_codecid) { |
| 244 | case FLV_CODECID_H263: |
| 245 | vcodec->codec_id = AV_CODEC_ID_FLV1; |
| 246 | break; |
| 247 | case FLV_CODECID_REALH263: |
| 248 | vcodec->codec_id = AV_CODEC_ID_H263; |
| 249 | break; // Really mean it this time |
| 250 | case FLV_CODECID_SCREEN: |
| 251 | vcodec->codec_id = AV_CODEC_ID_FLASHSV; |
| 252 | break; |
| 253 | case FLV_CODECID_SCREEN2: |
| 254 | vcodec->codec_id = AV_CODEC_ID_FLASHSV2; |
| 255 | break; |
| 256 | case FLV_CODECID_VP6: |
| 257 | vcodec->codec_id = AV_CODEC_ID_VP6F; |
| 258 | case FLV_CODECID_VP6A: |
| 259 | if (flv_codecid == FLV_CODECID_VP6A) |
| 260 | vcodec->codec_id = AV_CODEC_ID_VP6A; |
| 261 | if (read) { |
| 262 | if (vcodec->extradata_size != 1) { |
| 263 | ff_alloc_extradata(vcodec, 1); |
| 264 | } |
| 265 | if (vcodec->extradata) |
| 266 | vcodec->extradata[0] = avio_r8(s->pb); |
| 267 | else |
| 268 | avio_skip(s->pb, 1); |
| 269 | } |
| 270 | return 1; // 1 byte body size adjustment for flv_read_packet() |
| 271 | case FLV_CODECID_H264: |
| 272 | vcodec->codec_id = AV_CODEC_ID_H264; |
| 273 | vstream->need_parsing = AVSTREAM_PARSE_HEADERS; |
| 274 | return 3; // not 4, reading packet type will consume one byte |
| 275 | case FLV_CODECID_MPEG4: |
| 276 | vcodec->codec_id = AV_CODEC_ID_MPEG4; |
| 277 | return 3; |
| 278 | default: |
| 279 | avpriv_request_sample(s, "Video codec (%x)", flv_codecid); |
| 280 | vcodec->codec_tag = flv_codecid; |
| 281 | } |
| 282 | |
| 283 | return 0; |
| 284 | } |
| 285 | |
| 286 | static int amf_get_string(AVIOContext *ioc, char *buffer, int buffsize) |
| 287 | { |
| 288 | int length = avio_rb16(ioc); |
| 289 | if (length >= buffsize) { |
| 290 | avio_skip(ioc, length); |
| 291 | return -1; |
| 292 | } |
| 293 | |
| 294 | avio_read(ioc, buffer, length); |
| 295 | |
| 296 | buffer[length] = '\0'; |
| 297 | |
| 298 | return length; |
| 299 | } |
| 300 | |
| 301 | static int parse_keyframes_index(AVFormatContext *s, AVIOContext *ioc, |
| 302 | AVStream *vstream, int64_t max_pos) |
| 303 | { |
| 304 | FLVContext *flv = s->priv_data; |
| 305 | unsigned int timeslen = 0, fileposlen = 0, i; |
| 306 | char str_val[256]; |
| 307 | int64_t *times = NULL; |
| 308 | int64_t *filepositions = NULL; |
| 309 | int ret = AVERROR(ENOSYS); |
| 310 | int64_t initial_pos = avio_tell(ioc); |
| 311 | |
| 312 | if (vstream->nb_index_entries>0) { |
| 313 | av_log(s, AV_LOG_WARNING, "Skipping duplicate index\n"); |
| 314 | return 0; |
| 315 | } |
| 316 | |
| 317 | if (s->flags & AVFMT_FLAG_IGNIDX) |
| 318 | return 0; |
| 319 | |
| 320 | while (avio_tell(ioc) < max_pos - 2 && |
| 321 | amf_get_string(ioc, str_val, sizeof(str_val)) > 0) { |
| 322 | int64_t **current_array; |
| 323 | unsigned int arraylen; |
| 324 | |
| 325 | // Expect array object in context |
| 326 | if (avio_r8(ioc) != AMF_DATA_TYPE_ARRAY) |
| 327 | break; |
| 328 | |
| 329 | arraylen = avio_rb32(ioc); |
| 330 | if (arraylen>>28) |
| 331 | break; |
| 332 | |
| 333 | if (!strcmp(KEYFRAMES_TIMESTAMP_TAG , str_val) && !times) { |
| 334 | current_array = × |
| 335 | timeslen = arraylen; |
| 336 | } else if (!strcmp(KEYFRAMES_BYTEOFFSET_TAG, str_val) && |
| 337 | !filepositions) { |
| 338 | current_array = &filepositions; |
| 339 | fileposlen = arraylen; |
| 340 | } else |
| 341 | // unexpected metatag inside keyframes, will not use such |
| 342 | // metadata for indexing |
| 343 | break; |
| 344 | |
| 345 | if (!(*current_array = av_mallocz(sizeof(**current_array) * arraylen))) { |
| 346 | ret = AVERROR(ENOMEM); |
| 347 | goto finish; |
| 348 | } |
| 349 | |
| 350 | for (i = 0; i < arraylen && avio_tell(ioc) < max_pos - 1; i++) { |
| 351 | if (avio_r8(ioc) != AMF_DATA_TYPE_NUMBER) |
| 352 | goto invalid; |
| 353 | current_array[0][i] = av_int2double(avio_rb64(ioc)); |
| 354 | } |
| 355 | if (times && filepositions) { |
| 356 | // All done, exiting at a position allowing amf_parse_object |
| 357 | // to finish parsing the object |
| 358 | ret = 0; |
| 359 | break; |
| 360 | } |
| 361 | } |
| 362 | |
| 363 | if (timeslen == fileposlen && fileposlen>1 && max_pos <= filepositions[0]) { |
| 364 | for (i = 0; i < fileposlen; i++) { |
| 365 | av_add_index_entry(vstream, filepositions[i], times[i] * 1000, |
| 366 | 0, 0, AVINDEX_KEYFRAME); |
| 367 | if (i < 2) { |
| 368 | flv->validate_index[i].pos = filepositions[i]; |
| 369 | flv->validate_index[i].dts = times[i] * 1000; |
| 370 | flv->validate_count = i + 1; |
| 371 | } |
| 372 | } |
| 373 | } else { |
| 374 | invalid: |
| 375 | av_log(s, AV_LOG_WARNING, "Invalid keyframes object, skipping.\n"); |
| 376 | } |
| 377 | |
| 378 | finish: |
| 379 | av_freep(×); |
| 380 | av_freep(&filepositions); |
| 381 | avio_seek(ioc, initial_pos, SEEK_SET); |
| 382 | return ret; |
| 383 | } |
| 384 | |
| 385 | static int amf_parse_object(AVFormatContext *s, AVStream *astream, |
| 386 | AVStream *vstream, const char *key, |
| 387 | int64_t max_pos, int depth) |
| 388 | { |
| 389 | AVCodecContext *acodec, *vcodec; |
| 390 | FLVContext *flv = s->priv_data; |
| 391 | AVIOContext *ioc; |
| 392 | AMFDataType amf_type; |
| 393 | char str_val[256]; |
| 394 | double num_val; |
| 395 | |
| 396 | num_val = 0; |
| 397 | ioc = s->pb; |
| 398 | amf_type = avio_r8(ioc); |
| 399 | |
| 400 | switch (amf_type) { |
| 401 | case AMF_DATA_TYPE_NUMBER: |
| 402 | num_val = av_int2double(avio_rb64(ioc)); |
| 403 | break; |
| 404 | case AMF_DATA_TYPE_BOOL: |
| 405 | num_val = avio_r8(ioc); |
| 406 | break; |
| 407 | case AMF_DATA_TYPE_STRING: |
| 408 | if (amf_get_string(ioc, str_val, sizeof(str_val)) < 0) |
| 409 | return -1; |
| 410 | break; |
| 411 | case AMF_DATA_TYPE_OBJECT: |
| 412 | if ((vstream || astream) && key && |
| 413 | ioc->seekable && |
| 414 | !strcmp(KEYFRAMES_TAG, key) && depth == 1) |
| 415 | if (parse_keyframes_index(s, ioc, vstream ? vstream : astream, |
| 416 | max_pos) < 0) |
| 417 | av_log(s, AV_LOG_ERROR, "Keyframe index parsing failed\n"); |
| 418 | |
| 419 | while (avio_tell(ioc) < max_pos - 2 && |
| 420 | amf_get_string(ioc, str_val, sizeof(str_val)) > 0) |
| 421 | if (amf_parse_object(s, astream, vstream, str_val, max_pos, |
| 422 | depth + 1) < 0) |
| 423 | return -1; // if we couldn't skip, bomb out. |
| 424 | if (avio_r8(ioc) != AMF_END_OF_OBJECT) |
| 425 | return -1; |
| 426 | break; |
| 427 | case AMF_DATA_TYPE_NULL: |
| 428 | case AMF_DATA_TYPE_UNDEFINED: |
| 429 | case AMF_DATA_TYPE_UNSUPPORTED: |
| 430 | break; // these take up no additional space |
| 431 | case AMF_DATA_TYPE_MIXEDARRAY: |
| 432 | avio_skip(ioc, 4); // skip 32-bit max array index |
| 433 | while (avio_tell(ioc) < max_pos - 2 && |
| 434 | amf_get_string(ioc, str_val, sizeof(str_val)) > 0) |
| 435 | // this is the only case in which we would want a nested |
| 436 | // parse to not skip over the object |
| 437 | if (amf_parse_object(s, astream, vstream, str_val, max_pos, |
| 438 | depth + 1) < 0) |
| 439 | return -1; |
| 440 | if (avio_r8(ioc) != AMF_END_OF_OBJECT) |
| 441 | return -1; |
| 442 | break; |
| 443 | case AMF_DATA_TYPE_ARRAY: |
| 444 | { |
| 445 | unsigned int arraylen, i; |
| 446 | |
| 447 | arraylen = avio_rb32(ioc); |
| 448 | for (i = 0; i < arraylen && avio_tell(ioc) < max_pos - 1; i++) |
| 449 | if (amf_parse_object(s, NULL, NULL, NULL, max_pos, |
| 450 | depth + 1) < 0) |
| 451 | return -1; // if we couldn't skip, bomb out. |
| 452 | } |
| 453 | break; |
| 454 | case AMF_DATA_TYPE_DATE: |
| 455 | avio_skip(ioc, 8 + 2); // timestamp (double) and UTC offset (int16) |
| 456 | break; |
| 457 | default: // unsupported type, we couldn't skip |
| 458 | return -1; |
| 459 | } |
| 460 | |
| 461 | if (key) { |
| 462 | acodec = astream ? astream->codec : NULL; |
| 463 | vcodec = vstream ? vstream->codec : NULL; |
| 464 | |
| 465 | // stream info doesn't live any deeper than the first object |
| 466 | if (depth == 1) { |
| 467 | if (amf_type == AMF_DATA_TYPE_NUMBER || |
| 468 | amf_type == AMF_DATA_TYPE_BOOL) { |
| 469 | if (!strcmp(key, "duration")) |
| 470 | s->duration = num_val * AV_TIME_BASE; |
| 471 | else if (!strcmp(key, "videodatarate") && vcodec && |
| 472 | 0 <= (int)(num_val * 1024.0)) |
| 473 | vcodec->bit_rate = num_val * 1024.0; |
| 474 | else if (!strcmp(key, "audiodatarate") && acodec && |
| 475 | 0 <= (int)(num_val * 1024.0)) |
| 476 | acodec->bit_rate = num_val * 1024.0; |
| 477 | else if (!strcmp(key, "datastream")) { |
| 478 | AVStream *st = create_stream(s, AVMEDIA_TYPE_DATA); |
| 479 | if (!st) |
| 480 | return AVERROR(ENOMEM); |
| 481 | st->codec->codec_id = AV_CODEC_ID_TEXT; |
| 482 | } else if (flv->trust_metadata) { |
| 483 | if (!strcmp(key, "videocodecid") && vcodec) { |
| 484 | flv_set_video_codec(s, vstream, num_val, 0); |
| 485 | } else if (!strcmp(key, "audiocodecid") && acodec) { |
| 486 | int id = ((int)num_val) << FLV_AUDIO_CODECID_OFFSET; |
| 487 | flv_set_audio_codec(s, astream, acodec, id); |
| 488 | } else if (!strcmp(key, "audiosamplerate") && acodec) { |
| 489 | acodec->sample_rate = num_val; |
| 490 | } else if (!strcmp(key, "audiosamplesize") && acodec) { |
| 491 | acodec->bits_per_coded_sample = num_val; |
| 492 | } else if (!strcmp(key, "stereo") && acodec) { |
| 493 | acodec->channels = num_val + 1; |
| 494 | acodec->channel_layout = acodec->channels == 2 ? |
| 495 | AV_CH_LAYOUT_STEREO : |
| 496 | AV_CH_LAYOUT_MONO; |
| 497 | } else if (!strcmp(key, "width") && vcodec) { |
| 498 | vcodec->width = num_val; |
| 499 | } else if (!strcmp(key, "height") && vcodec) { |
| 500 | vcodec->height = num_val; |
| 501 | } |
| 502 | } |
| 503 | } |
| 504 | } |
| 505 | |
| 506 | if (amf_type == AMF_DATA_TYPE_OBJECT && s->nb_streams == 1 && |
| 507 | ((!acodec && !strcmp(key, "audiocodecid")) || |
| 508 | (!vcodec && !strcmp(key, "videocodecid")))) |
| 509 | s->ctx_flags &= ~AVFMTCTX_NOHEADER; //If there is either audio/video missing, codecid will be an empty object |
| 510 | |
| 511 | if (!strcmp(key, "duration") || |
| 512 | !strcmp(key, "filesize") || |
| 513 | !strcmp(key, "width") || |
| 514 | !strcmp(key, "height") || |
| 515 | !strcmp(key, "videodatarate") || |
| 516 | !strcmp(key, "framerate") || |
| 517 | !strcmp(key, "videocodecid") || |
| 518 | !strcmp(key, "audiodatarate") || |
| 519 | !strcmp(key, "audiosamplerate") || |
| 520 | !strcmp(key, "audiosamplesize") || |
| 521 | !strcmp(key, "stereo") || |
| 522 | !strcmp(key, "audiocodecid") || |
| 523 | !strcmp(key, "datastream")) |
| 524 | return 0; |
| 525 | |
| 526 | s->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED; |
| 527 | if (amf_type == AMF_DATA_TYPE_BOOL) { |
| 528 | av_strlcpy(str_val, num_val > 0 ? "true" : "false", |
| 529 | sizeof(str_val)); |
| 530 | av_dict_set(&s->metadata, key, str_val, 0); |
| 531 | } else if (amf_type == AMF_DATA_TYPE_NUMBER) { |
| 532 | snprintf(str_val, sizeof(str_val), "%.f", num_val); |
| 533 | av_dict_set(&s->metadata, key, str_val, 0); |
| 534 | } else if (amf_type == AMF_DATA_TYPE_STRING) |
| 535 | av_dict_set(&s->metadata, key, str_val, 0); |
| 536 | } |
| 537 | |
| 538 | return 0; |
| 539 | } |
| 540 | |
| 541 | static int flv_read_metabody(AVFormatContext *s, int64_t next_pos) |
| 542 | { |
| 543 | AMFDataType type; |
| 544 | AVStream *stream, *astream, *vstream; |
| 545 | AVStream av_unused *dstream; |
| 546 | AVIOContext *ioc; |
| 547 | int i; |
| 548 | // only needs to hold the string "onMetaData". |
| 549 | // Anything longer is something we don't want. |
| 550 | char buffer[11]; |
| 551 | |
| 552 | astream = NULL; |
| 553 | vstream = NULL; |
| 554 | dstream = NULL; |
| 555 | ioc = s->pb; |
| 556 | |
| 557 | // first object needs to be "onMetaData" string |
| 558 | type = avio_r8(ioc); |
| 559 | if (type != AMF_DATA_TYPE_STRING || |
| 560 | amf_get_string(ioc, buffer, sizeof(buffer)) < 0) |
| 561 | return -1; |
| 562 | |
| 563 | if (!strcmp(buffer, "onTextData")) |
| 564 | return 1; |
| 565 | |
| 566 | if (strcmp(buffer, "onMetaData") && strcmp(buffer, "onCuePoint")) |
| 567 | return -1; |
| 568 | |
| 569 | // find the streams now so that amf_parse_object doesn't need to do |
| 570 | // the lookup every time it is called. |
| 571 | for (i = 0; i < s->nb_streams; i++) { |
| 572 | stream = s->streams[i]; |
| 573 | if (stream->codec->codec_type == AVMEDIA_TYPE_VIDEO) |
| 574 | vstream = stream; |
| 575 | else if (stream->codec->codec_type == AVMEDIA_TYPE_AUDIO) |
| 576 | astream = stream; |
| 577 | else if (stream->codec->codec_type == AVMEDIA_TYPE_DATA) |
| 578 | dstream = stream; |
| 579 | } |
| 580 | |
| 581 | // parse the second object (we want a mixed array) |
| 582 | if (amf_parse_object(s, astream, vstream, buffer, next_pos, 0) < 0) |
| 583 | return -1; |
| 584 | |
| 585 | return 0; |
| 586 | } |
| 587 | |
| 588 | static int flv_read_header(AVFormatContext *s) |
| 589 | { |
| 590 | int offset, flags; |
| 591 | |
| 592 | avio_skip(s->pb, 4); |
| 593 | flags = avio_r8(s->pb); |
| 594 | |
| 595 | s->ctx_flags |= AVFMTCTX_NOHEADER; |
| 596 | |
| 597 | if (flags & FLV_HEADER_FLAG_HASVIDEO) |
| 598 | if (!create_stream(s, AVMEDIA_TYPE_VIDEO)) |
| 599 | return AVERROR(ENOMEM); |
| 600 | if (flags & FLV_HEADER_FLAG_HASAUDIO) |
| 601 | if (!create_stream(s, AVMEDIA_TYPE_AUDIO)) |
| 602 | return AVERROR(ENOMEM); |
| 603 | // Flag doesn't indicate whether or not there is script-data present. Must |
| 604 | // create that stream if it's encountered. |
| 605 | |
| 606 | offset = avio_rb32(s->pb); |
| 607 | avio_seek(s->pb, offset, SEEK_SET); |
| 608 | avio_skip(s->pb, 4); |
| 609 | |
| 610 | s->start_time = 0; |
| 611 | |
| 612 | return 0; |
| 613 | } |
| 614 | |
| 615 | static int flv_read_close(AVFormatContext *s) |
| 616 | { |
| 617 | int i; |
| 618 | FLVContext *flv = s->priv_data; |
| 619 | for (i=0; i<FLV_STREAM_TYPE_NB; i++) |
| 620 | av_freep(&flv->new_extradata[i]); |
| 621 | return 0; |
| 622 | } |
| 623 | |
| 624 | static int flv_get_extradata(AVFormatContext *s, AVStream *st, int size) |
| 625 | { |
| 626 | av_freep(&st->codec->extradata); |
| 627 | if (ff_get_extradata(st->codec, s->pb, size) < 0) |
| 628 | return AVERROR(ENOMEM); |
| 629 | return 0; |
| 630 | } |
| 631 | |
| 632 | static int flv_queue_extradata(FLVContext *flv, AVIOContext *pb, int stream, |
| 633 | int size) |
| 634 | { |
| 635 | av_free(flv->new_extradata[stream]); |
| 636 | flv->new_extradata[stream] = av_mallocz(size + |
| 637 | FF_INPUT_BUFFER_PADDING_SIZE); |
| 638 | if (!flv->new_extradata[stream]) |
| 639 | return AVERROR(ENOMEM); |
| 640 | flv->new_extradata_size[stream] = size; |
| 641 | avio_read(pb, flv->new_extradata[stream], size); |
| 642 | return 0; |
| 643 | } |
| 644 | |
| 645 | static void clear_index_entries(AVFormatContext *s, int64_t pos) |
| 646 | { |
| 647 | int i, j, out; |
| 648 | av_log(s, AV_LOG_WARNING, |
| 649 | "Found invalid index entries, clearing the index.\n"); |
| 650 | for (i = 0; i < s->nb_streams; i++) { |
| 651 | AVStream *st = s->streams[i]; |
| 652 | /* Remove all index entries that point to >= pos */ |
| 653 | out = 0; |
| 654 | for (j = 0; j < st->nb_index_entries; j++) |
| 655 | if (st->index_entries[j].pos < pos) |
| 656 | st->index_entries[out++] = st->index_entries[j]; |
| 657 | st->nb_index_entries = out; |
| 658 | } |
| 659 | } |
| 660 | |
| 661 | static int amf_skip_tag(AVIOContext *pb, AMFDataType type) |
| 662 | { |
| 663 | int nb = -1, ret, parse_name = 1; |
| 664 | |
| 665 | switch (type) { |
| 666 | case AMF_DATA_TYPE_NUMBER: |
| 667 | avio_skip(pb, 8); |
| 668 | break; |
| 669 | case AMF_DATA_TYPE_BOOL: |
| 670 | avio_skip(pb, 1); |
| 671 | break; |
| 672 | case AMF_DATA_TYPE_STRING: |
| 673 | avio_skip(pb, avio_rb16(pb)); |
| 674 | break; |
| 675 | case AMF_DATA_TYPE_ARRAY: |
| 676 | parse_name = 0; |
| 677 | case AMF_DATA_TYPE_MIXEDARRAY: |
| 678 | nb = avio_rb32(pb); |
| 679 | case AMF_DATA_TYPE_OBJECT: |
| 680 | while(!pb->eof_reached && (nb-- > 0 || type != AMF_DATA_TYPE_ARRAY)) { |
| 681 | if (parse_name) { |
| 682 | int size = avio_rb16(pb); |
| 683 | if (!size) { |
| 684 | avio_skip(pb, 1); |
| 685 | break; |
| 686 | } |
| 687 | avio_skip(pb, size); |
| 688 | } |
| 689 | if ((ret = amf_skip_tag(pb, avio_r8(pb))) < 0) |
| 690 | return ret; |
| 691 | } |
| 692 | break; |
| 693 | case AMF_DATA_TYPE_NULL: |
| 694 | case AMF_DATA_TYPE_OBJECT_END: |
| 695 | break; |
| 696 | default: |
| 697 | return AVERROR_INVALIDDATA; |
| 698 | } |
| 699 | return 0; |
| 700 | } |
| 701 | |
| 702 | static int flv_data_packet(AVFormatContext *s, AVPacket *pkt, |
| 703 | int64_t dts, int64_t next) |
| 704 | { |
| 705 | AVIOContext *pb = s->pb; |
| 706 | AVStream *st = NULL; |
| 707 | char buf[20]; |
| 708 | int ret = AVERROR_INVALIDDATA; |
| 709 | int i, length = -1; |
| 710 | |
| 711 | switch (avio_r8(pb)) { |
| 712 | case AMF_DATA_TYPE_MIXEDARRAY: |
| 713 | avio_seek(pb, 4, SEEK_CUR); |
| 714 | case AMF_DATA_TYPE_OBJECT: |
| 715 | break; |
| 716 | default: |
| 717 | goto skip; |
| 718 | } |
| 719 | |
| 720 | while ((ret = amf_get_string(pb, buf, sizeof(buf))) > 0) { |
| 721 | AMFDataType type = avio_r8(pb); |
| 722 | if (type == AMF_DATA_TYPE_STRING && !strcmp(buf, "text")) { |
| 723 | length = avio_rb16(pb); |
| 724 | ret = av_get_packet(pb, pkt, length); |
| 725 | if (ret < 0) |
| 726 | goto skip; |
| 727 | else |
| 728 | break; |
| 729 | } else { |
| 730 | if ((ret = amf_skip_tag(pb, type)) < 0) |
| 731 | goto skip; |
| 732 | } |
| 733 | } |
| 734 | |
| 735 | if (length < 0) { |
| 736 | ret = AVERROR_INVALIDDATA; |
| 737 | goto skip; |
| 738 | } |
| 739 | |
| 740 | for (i = 0; i < s->nb_streams; i++) { |
| 741 | st = s->streams[i]; |
| 742 | if (st->codec->codec_type == AVMEDIA_TYPE_DATA) |
| 743 | break; |
| 744 | } |
| 745 | |
| 746 | if (i == s->nb_streams) { |
| 747 | st = create_stream(s, AVMEDIA_TYPE_DATA); |
| 748 | if (!st) |
| 749 | return AVERROR(ENOMEM); |
| 750 | st->codec->codec_id = AV_CODEC_ID_TEXT; |
| 751 | } |
| 752 | |
| 753 | pkt->dts = dts; |
| 754 | pkt->pts = dts; |
| 755 | pkt->size = ret; |
| 756 | |
| 757 | pkt->stream_index = st->index; |
| 758 | pkt->flags |= AV_PKT_FLAG_KEY; |
| 759 | |
| 760 | skip: |
| 761 | avio_seek(s->pb, next + 4, SEEK_SET); |
| 762 | |
| 763 | return ret; |
| 764 | } |
| 765 | |
| 766 | static int flv_read_packet(AVFormatContext *s, AVPacket *pkt) |
| 767 | { |
| 768 | FLVContext *flv = s->priv_data; |
| 769 | int ret, i, type, size, flags; |
| 770 | int stream_type=-1; |
| 771 | int64_t next, pos, meta_pos; |
| 772 | int64_t dts, pts = AV_NOPTS_VALUE; |
| 773 | int av_uninit(channels); |
| 774 | int av_uninit(sample_rate); |
| 775 | AVStream *st = NULL; |
| 776 | |
| 777 | /* pkt size is repeated at end. skip it */ |
| 778 | for (;; avio_skip(s->pb, 4)) { |
| 779 | pos = avio_tell(s->pb); |
| 780 | type = (avio_r8(s->pb) & 0x1F); |
| 781 | size = avio_rb24(s->pb); |
| 782 | dts = avio_rb24(s->pb); |
| 783 | dts |= avio_r8(s->pb) << 24; |
| 784 | av_dlog(s, "type:%d, size:%d, dts:%"PRId64" pos:%"PRId64"\n", type, size, dts, avio_tell(s->pb)); |
| 785 | if (avio_feof(s->pb)) |
| 786 | return AVERROR_EOF; |
| 787 | avio_skip(s->pb, 3); /* stream id, always 0 */ |
| 788 | flags = 0; |
| 789 | |
| 790 | if (flv->validate_next < flv->validate_count) { |
| 791 | int64_t validate_pos = flv->validate_index[flv->validate_next].pos; |
| 792 | if (pos == validate_pos) { |
| 793 | if (FFABS(dts - flv->validate_index[flv->validate_next].dts) <= |
| 794 | VALIDATE_INDEX_TS_THRESH) { |
| 795 | flv->validate_next++; |
| 796 | } else { |
| 797 | clear_index_entries(s, validate_pos); |
| 798 | flv->validate_count = 0; |
| 799 | } |
| 800 | } else if (pos > validate_pos) { |
| 801 | clear_index_entries(s, validate_pos); |
| 802 | flv->validate_count = 0; |
| 803 | } |
| 804 | } |
| 805 | |
| 806 | if (size == 0) |
| 807 | continue; |
| 808 | |
| 809 | next = size + avio_tell(s->pb); |
| 810 | |
| 811 | if (type == FLV_TAG_TYPE_AUDIO) { |
| 812 | stream_type = FLV_STREAM_TYPE_AUDIO; |
| 813 | flags = avio_r8(s->pb); |
| 814 | size--; |
| 815 | } else if (type == FLV_TAG_TYPE_VIDEO) { |
| 816 | stream_type = FLV_STREAM_TYPE_VIDEO; |
| 817 | flags = avio_r8(s->pb); |
| 818 | size--; |
| 819 | if ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_VIDEO_INFO_CMD) |
| 820 | goto skip; |
| 821 | } else if (type == FLV_TAG_TYPE_META) { |
| 822 | stream_type=FLV_STREAM_TYPE_DATA; |
| 823 | if (size > 13 + 1 + 4 && dts == 0) { // Header-type metadata stuff |
| 824 | meta_pos = avio_tell(s->pb); |
| 825 | if (flv_read_metabody(s, next) == 0) { |
| 826 | goto skip; |
| 827 | } |
| 828 | avio_seek(s->pb, meta_pos, SEEK_SET); |
| 829 | } |
| 830 | } else { |
| 831 | av_log(s, AV_LOG_DEBUG, |
| 832 | "Skipping flv packet: type %d, size %d, flags %d.\n", |
| 833 | type, size, flags); |
| 834 | skip: |
| 835 | avio_seek(s->pb, next, SEEK_SET); |
| 836 | continue; |
| 837 | } |
| 838 | |
| 839 | /* skip empty data packets */ |
| 840 | if (!size) |
| 841 | continue; |
| 842 | |
| 843 | /* now find stream */ |
| 844 | for (i = 0; i < s->nb_streams; i++) { |
| 845 | st = s->streams[i]; |
| 846 | if (stream_type == FLV_STREAM_TYPE_AUDIO) { |
| 847 | if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO && |
| 848 | (s->audio_codec_id || flv_same_audio_codec(st->codec, flags))) |
| 849 | break; |
| 850 | } else if (stream_type == FLV_STREAM_TYPE_VIDEO) { |
| 851 | if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && |
| 852 | (s->video_codec_id || flv_same_video_codec(st->codec, flags))) |
| 853 | break; |
| 854 | } else if (stream_type == FLV_STREAM_TYPE_DATA) { |
| 855 | if (st->codec->codec_type == AVMEDIA_TYPE_DATA) |
| 856 | break; |
| 857 | } |
| 858 | } |
| 859 | if (i == s->nb_streams) { |
| 860 | static const enum AVMediaType stream_types[] = {AVMEDIA_TYPE_VIDEO, AVMEDIA_TYPE_AUDIO, AVMEDIA_TYPE_DATA}; |
| 861 | av_log(s, AV_LOG_WARNING, "Stream discovered after head already parsed\n"); |
| 862 | st = create_stream(s, stream_types[stream_type]); |
| 863 | if (!st) |
| 864 | return AVERROR(ENOMEM); |
| 865 | |
| 866 | } |
| 867 | av_dlog(s, "%d %X %d \n", stream_type, flags, st->discard); |
| 868 | |
| 869 | if ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY || |
| 870 | stream_type == FLV_STREAM_TYPE_AUDIO) |
| 871 | av_add_index_entry(st, pos, dts, size, 0, AVINDEX_KEYFRAME); |
| 872 | |
| 873 | if ( (st->discard >= AVDISCARD_NONKEY && !((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY || (stream_type == FLV_STREAM_TYPE_AUDIO))) |
| 874 | ||(st->discard >= AVDISCARD_BIDIR && ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_DISP_INTER && (stream_type == FLV_STREAM_TYPE_VIDEO))) |
| 875 | || st->discard >= AVDISCARD_ALL |
| 876 | ) { |
| 877 | avio_seek(s->pb, next, SEEK_SET); |
| 878 | continue; |
| 879 | } |
| 880 | break; |
| 881 | } |
| 882 | |
| 883 | // if not streamed and no duration from metadata then seek to end to find |
| 884 | // the duration from the timestamps |
| 885 | if (s->pb->seekable && (!s->duration || s->duration == AV_NOPTS_VALUE) && !flv->searched_for_end) { |
| 886 | int size; |
| 887 | const int64_t pos = avio_tell(s->pb); |
| 888 | // Read the last 4 bytes of the file, this should be the size of the |
| 889 | // previous FLV tag. Use the timestamp of its payload as duration. |
| 890 | int64_t fsize = avio_size(s->pb); |
| 891 | retry_duration: |
| 892 | avio_seek(s->pb, fsize - 4, SEEK_SET); |
| 893 | size = avio_rb32(s->pb); |
| 894 | // Seek to the start of the last FLV tag at position (fsize - 4 - size) |
| 895 | // but skip the byte indicating the type. |
| 896 | avio_seek(s->pb, fsize - 3 - size, SEEK_SET); |
| 897 | if (size == avio_rb24(s->pb) + 11) { |
| 898 | uint32_t ts = avio_rb24(s->pb); |
| 899 | ts |= avio_r8(s->pb) << 24; |
| 900 | if (ts) |
| 901 | s->duration = ts * (int64_t)AV_TIME_BASE / 1000; |
| 902 | else if (fsize >= 8 && fsize - 8 >= size) { |
| 903 | fsize -= size+4; |
| 904 | goto retry_duration; |
| 905 | } |
| 906 | } |
| 907 | |
| 908 | avio_seek(s->pb, pos, SEEK_SET); |
| 909 | flv->searched_for_end = 1; |
| 910 | } |
| 911 | |
| 912 | if (stream_type == FLV_STREAM_TYPE_AUDIO) { |
| 913 | int bits_per_coded_sample; |
| 914 | channels = (flags & FLV_AUDIO_CHANNEL_MASK) == FLV_STEREO ? 2 : 1; |
| 915 | sample_rate = 44100 << ((flags & FLV_AUDIO_SAMPLERATE_MASK) >> |
| 916 | FLV_AUDIO_SAMPLERATE_OFFSET) >> 3; |
| 917 | bits_per_coded_sample = (flags & FLV_AUDIO_SAMPLESIZE_MASK) ? 16 : 8; |
| 918 | if (!st->codec->channels || !st->codec->sample_rate || |
| 919 | !st->codec->bits_per_coded_sample) { |
| 920 | st->codec->channels = channels; |
| 921 | st->codec->channel_layout = channels == 1 |
| 922 | ? AV_CH_LAYOUT_MONO |
| 923 | : AV_CH_LAYOUT_STEREO; |
| 924 | st->codec->sample_rate = sample_rate; |
| 925 | st->codec->bits_per_coded_sample = bits_per_coded_sample; |
| 926 | } |
| 927 | if (!st->codec->codec_id) { |
| 928 | flv_set_audio_codec(s, st, st->codec, |
| 929 | flags & FLV_AUDIO_CODECID_MASK); |
| 930 | flv->last_sample_rate = |
| 931 | sample_rate = st->codec->sample_rate; |
| 932 | flv->last_channels = |
| 933 | channels = st->codec->channels; |
| 934 | } else { |
| 935 | AVCodecContext ctx = {0}; |
| 936 | ctx.sample_rate = sample_rate; |
| 937 | ctx.bits_per_coded_sample = bits_per_coded_sample; |
| 938 | flv_set_audio_codec(s, st, &ctx, flags & FLV_AUDIO_CODECID_MASK); |
| 939 | sample_rate = ctx.sample_rate; |
| 940 | } |
| 941 | } else if (stream_type == FLV_STREAM_TYPE_VIDEO) { |
| 942 | size -= flv_set_video_codec(s, st, flags & FLV_VIDEO_CODECID_MASK, 1); |
| 943 | } |
| 944 | |
| 945 | if (st->codec->codec_id == AV_CODEC_ID_AAC || |
| 946 | st->codec->codec_id == AV_CODEC_ID_H264 || |
| 947 | st->codec->codec_id == AV_CODEC_ID_MPEG4) { |
| 948 | int type = avio_r8(s->pb); |
| 949 | size--; |
| 950 | if (st->codec->codec_id == AV_CODEC_ID_H264 || st->codec->codec_id == AV_CODEC_ID_MPEG4) { |
| 951 | // sign extension |
| 952 | int32_t cts = (avio_rb24(s->pb) + 0xff800000) ^ 0xff800000; |
| 953 | pts = dts + cts; |
| 954 | if (cts < 0) { // dts might be wrong |
| 955 | if (!flv->wrong_dts) |
| 956 | av_log(s, AV_LOG_WARNING, |
| 957 | "Negative cts, previous timestamps might be wrong.\n"); |
| 958 | flv->wrong_dts = 1; |
| 959 | } else if (FFABS(dts - pts) > 1000*60*15) { |
| 960 | av_log(s, AV_LOG_WARNING, |
| 961 | "invalid timestamps %"PRId64" %"PRId64"\n", dts, pts); |
| 962 | dts = pts = AV_NOPTS_VALUE; |
| 963 | } |
| 964 | } |
| 965 | if (type == 0 && (!st->codec->extradata || st->codec->codec_id == AV_CODEC_ID_AAC || |
| 966 | st->codec->codec_id == AV_CODEC_ID_H264)) { |
| 967 | AVDictionaryEntry *t; |
| 968 | |
| 969 | if (st->codec->extradata) { |
| 970 | if ((ret = flv_queue_extradata(flv, s->pb, stream_type, size)) < 0) |
| 971 | return ret; |
| 972 | ret = AVERROR(EAGAIN); |
| 973 | goto leave; |
| 974 | } |
| 975 | if ((ret = flv_get_extradata(s, st, size)) < 0) |
| 976 | return ret; |
| 977 | |
| 978 | /* Workaround for buggy Omnia A/XE encoder */ |
| 979 | t = av_dict_get(s->metadata, "Encoder", NULL, 0); |
| 980 | if (st->codec->codec_id == AV_CODEC_ID_AAC && t && !strcmp(t->value, "Omnia A/XE")) |
| 981 | st->codec->extradata_size = 2; |
| 982 | |
| 983 | if (st->codec->codec_id == AV_CODEC_ID_AAC && 0) { |
| 984 | MPEG4AudioConfig cfg; |
| 985 | |
| 986 | if (avpriv_mpeg4audio_get_config(&cfg, st->codec->extradata, |
| 987 | st->codec->extradata_size * 8, 1) >= 0) { |
| 988 | st->codec->channels = cfg.channels; |
| 989 | st->codec->channel_layout = 0; |
| 990 | if (cfg.ext_sample_rate) |
| 991 | st->codec->sample_rate = cfg.ext_sample_rate; |
| 992 | else |
| 993 | st->codec->sample_rate = cfg.sample_rate; |
| 994 | av_dlog(s, "mp4a config channels %d sample rate %d\n", |
| 995 | st->codec->channels, st->codec->sample_rate); |
| 996 | } |
| 997 | } |
| 998 | |
| 999 | ret = AVERROR(EAGAIN); |
| 1000 | goto leave; |
| 1001 | } |
| 1002 | } |
| 1003 | |
| 1004 | /* skip empty data packets */ |
| 1005 | if (!size) { |
| 1006 | ret = AVERROR(EAGAIN); |
| 1007 | goto leave; |
| 1008 | } |
| 1009 | |
| 1010 | ret = av_get_packet(s->pb, pkt, size); |
| 1011 | if (ret < 0) |
| 1012 | return ret; |
| 1013 | pkt->dts = dts; |
| 1014 | pkt->pts = pts == AV_NOPTS_VALUE ? dts : pts; |
| 1015 | pkt->stream_index = st->index; |
| 1016 | if (flv->new_extradata[stream_type]) { |
| 1017 | uint8_t *side = av_packet_new_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA, |
| 1018 | flv->new_extradata_size[stream_type]); |
| 1019 | if (side) { |
| 1020 | memcpy(side, flv->new_extradata[stream_type], |
| 1021 | flv->new_extradata_size[stream_type]); |
| 1022 | av_freep(&flv->new_extradata[stream_type]); |
| 1023 | flv->new_extradata_size[stream_type] = 0; |
| 1024 | } |
| 1025 | } |
| 1026 | if (stream_type == FLV_STREAM_TYPE_AUDIO && |
| 1027 | (sample_rate != flv->last_sample_rate || |
| 1028 | channels != flv->last_channels)) { |
| 1029 | flv->last_sample_rate = sample_rate; |
| 1030 | flv->last_channels = channels; |
| 1031 | ff_add_param_change(pkt, channels, 0, sample_rate, 0, 0); |
| 1032 | } |
| 1033 | |
| 1034 | if ( stream_type == FLV_STREAM_TYPE_AUDIO || |
| 1035 | ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY) || |
| 1036 | stream_type == FLV_STREAM_TYPE_DATA) |
| 1037 | pkt->flags |= AV_PKT_FLAG_KEY; |
| 1038 | |
| 1039 | leave: |
| 1040 | avio_skip(s->pb, 4); |
| 1041 | return ret; |
| 1042 | } |
| 1043 | |
| 1044 | static int flv_read_seek(AVFormatContext *s, int stream_index, |
| 1045 | int64_t ts, int flags) |
| 1046 | { |
| 1047 | FLVContext *flv = s->priv_data; |
| 1048 | flv->validate_count = 0; |
| 1049 | return avio_seek_time(s->pb, stream_index, ts, flags); |
| 1050 | } |
| 1051 | |
| 1052 | #define OFFSET(x) offsetof(FLVContext, x) |
| 1053 | #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM |
| 1054 | static const AVOption options[] = { |
| 1055 | { "flv_metadata", "Allocate streams according to the onMetaData array", OFFSET(trust_metadata), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VD }, |
| 1056 | { NULL } |
| 1057 | }; |
| 1058 | |
| 1059 | static const AVClass flv_class = { |
| 1060 | .class_name = "flvdec", |
| 1061 | .item_name = av_default_item_name, |
| 1062 | .option = options, |
| 1063 | .version = LIBAVUTIL_VERSION_INT, |
| 1064 | }; |
| 1065 | |
| 1066 | AVInputFormat ff_flv_demuxer = { |
| 1067 | .name = "flv", |
| 1068 | .long_name = NULL_IF_CONFIG_SMALL("FLV (Flash Video)"), |
| 1069 | .priv_data_size = sizeof(FLVContext), |
| 1070 | .read_probe = flv_probe, |
| 1071 | .read_header = flv_read_header, |
| 1072 | .read_packet = flv_read_packet, |
| 1073 | .read_seek = flv_read_seek, |
| 1074 | .read_close = flv_read_close, |
| 1075 | .extensions = "flv", |
| 1076 | .priv_class = &flv_class, |
| 1077 | }; |
| 1078 | |
| 1079 | static const AVClass live_flv_class = { |
| 1080 | .class_name = "live_flvdec", |
| 1081 | .item_name = av_default_item_name, |
| 1082 | .option = options, |
| 1083 | .version = LIBAVUTIL_VERSION_INT, |
| 1084 | }; |
| 1085 | |
| 1086 | AVInputFormat ff_live_flv_demuxer = { |
| 1087 | .name = "live_flv", |
| 1088 | .long_name = NULL_IF_CONFIG_SMALL("live RTMP FLV (Flash Video)"), |
| 1089 | .priv_data_size = sizeof(FLVContext), |
| 1090 | .read_probe = live_flv_probe, |
| 1091 | .read_header = flv_read_header, |
| 1092 | .read_packet = flv_read_packet, |
| 1093 | .read_seek = flv_read_seek, |
| 1094 | .read_close = flv_read_close, |
| 1095 | .extensions = "flv", |
| 1096 | .priv_class = &live_flv_class, |
| 1097 | .flags = AVFMT_TS_DISCONT |
| 1098 | }; |