3 * Copyright (c) 2003 The FFmpeg Project
5 * This demuxer will generate a 1 byte extradata for VP6F content.
7 * - upper 4 bits: difference between encoded width and visible width
8 * - lower 4 bits: difference between encoded height and visible height
10 * This file is part of FFmpeg.
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.
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.
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
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"
37 #include "avio_internal.h"
40 #define VALIDATE_INDEX_TS_THRESH 2500
42 #define RESYNC_BUFFER_SIZE (1<<20)
44 typedef struct FLVContext {
45 const AVClass *class; ///< Class for private options.
46 int trust_metadata; ///< configure streams according onMetaData
47 int trust_datasize; ///< trust data size of FLVTag
48 int dump_full_metadata; ///< Dump full metadata of the onMetadata
49 int wrong_dts; ///< wrong dts due to negative cts
50 uint8_t *new_extradata[FLV_STREAM_TYPE_NB];
51 int new_extradata_size[FLV_STREAM_TYPE_NB];
62 uint8_t resync_buffer[2*RESYNC_BUFFER_SIZE];
67 int last_keyframe_stream_index;
69 int64_t video_bit_rate;
70 int64_t audio_bit_rate;
71 int64_t *keyframe_times;
72 int64_t *keyframe_filepositions;
77 static int probe(AVProbeData *p, int live)
79 const uint8_t *d = p->buf;
80 unsigned offset = AV_RB32(d + 5);
85 d[3] < 5 && d[5] == 0 &&
86 offset + 100 < p->buf_size &&
88 int is_live = !memcmp(d + offset + 40, "NGINX RTMP", 10);
91 return AVPROBE_SCORE_MAX;
96 static int flv_probe(AVProbeData *p)
101 static int live_flv_probe(AVProbeData *p)
106 static void add_keyframes_index(AVFormatContext *s)
108 FLVContext *flv = s->priv_data;
109 AVStream *stream = NULL;
112 if (flv->last_keyframe_stream_index < 0) {
113 av_log(s, AV_LOG_DEBUG, "keyframe stream hasn't been created\n");
117 av_assert0(flv->last_keyframe_stream_index <= s->nb_streams);
118 stream = s->streams[flv->last_keyframe_stream_index];
120 if (stream->nb_index_entries == 0) {
121 for (i = 0; i < flv->keyframe_count; i++) {
122 av_log(s, AV_LOG_TRACE, "keyframe filepositions = %"PRId64" times = %"PRId64"\n",
123 flv->keyframe_filepositions[i], flv->keyframe_times[i] * 1000);
124 av_add_index_entry(stream, flv->keyframe_filepositions[i],
125 flv->keyframe_times[i] * 1000, 0, 0, AVINDEX_KEYFRAME);
128 av_log(s, AV_LOG_WARNING, "Skipping duplicate index\n");
130 if (stream->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
131 av_freep(&flv->keyframe_times);
132 av_freep(&flv->keyframe_filepositions);
133 flv->keyframe_count = 0;
137 static AVStream *create_stream(AVFormatContext *s, int codec_type)
139 FLVContext *flv = s->priv_data;
140 AVStream *st = avformat_new_stream(s, NULL);
143 st->codecpar->codec_type = codec_type;
144 if (s->nb_streams>=3 ||( s->nb_streams==2
145 && s->streams[0]->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE
146 && s->streams[1]->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE
147 && s->streams[0]->codecpar->codec_type != AVMEDIA_TYPE_DATA
148 && s->streams[1]->codecpar->codec_type != AVMEDIA_TYPE_DATA))
149 s->ctx_flags &= ~AVFMTCTX_NOHEADER;
150 if (codec_type == AVMEDIA_TYPE_AUDIO) {
151 st->codecpar->bit_rate = flv->audio_bit_rate;
152 flv->missing_streams &= ~FLV_HEADER_FLAG_HASAUDIO;
154 if (codec_type == AVMEDIA_TYPE_VIDEO) {
155 st->codecpar->bit_rate = flv->video_bit_rate;
156 flv->missing_streams &= ~FLV_HEADER_FLAG_HASVIDEO;
157 st->avg_frame_rate = flv->framerate;
161 avpriv_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
162 flv->last_keyframe_stream_index = s->nb_streams - 1;
163 add_keyframes_index(s);
167 static int flv_same_audio_codec(AVCodecParameters *apar, int flags)
169 int bits_per_coded_sample = (flags & FLV_AUDIO_SAMPLESIZE_MASK) ? 16 : 8;
170 int flv_codecid = flags & FLV_AUDIO_CODECID_MASK;
173 if (!apar->codec_id && !apar->codec_tag)
176 if (apar->bits_per_coded_sample != bits_per_coded_sample)
179 switch (flv_codecid) {
180 // no distinction between S16 and S8 PCM codec flags
181 case FLV_CODECID_PCM:
182 codec_id = bits_per_coded_sample == 8
185 : AV_CODEC_ID_PCM_S16BE;
187 : AV_CODEC_ID_PCM_S16LE;
189 return codec_id == apar->codec_id;
190 case FLV_CODECID_PCM_LE:
191 codec_id = bits_per_coded_sample == 8
193 : AV_CODEC_ID_PCM_S16LE;
194 return codec_id == apar->codec_id;
195 case FLV_CODECID_AAC:
196 return apar->codec_id == AV_CODEC_ID_AAC;
197 case FLV_CODECID_ADPCM:
198 return apar->codec_id == AV_CODEC_ID_ADPCM_SWF;
199 case FLV_CODECID_SPEEX:
200 return apar->codec_id == AV_CODEC_ID_SPEEX;
201 case FLV_CODECID_MP3:
202 return apar->codec_id == AV_CODEC_ID_MP3;
203 case FLV_CODECID_NELLYMOSER_8KHZ_MONO:
204 case FLV_CODECID_NELLYMOSER_16KHZ_MONO:
205 case FLV_CODECID_NELLYMOSER:
206 return apar->codec_id == AV_CODEC_ID_NELLYMOSER;
207 case FLV_CODECID_PCM_MULAW:
208 return apar->sample_rate == 8000 &&
209 apar->codec_id == AV_CODEC_ID_PCM_MULAW;
210 case FLV_CODECID_PCM_ALAW:
211 return apar->sample_rate == 8000 &&
212 apar->codec_id == AV_CODEC_ID_PCM_ALAW;
214 return apar->codec_tag == (flv_codecid >> FLV_AUDIO_CODECID_OFFSET);
218 static void flv_set_audio_codec(AVFormatContext *s, AVStream *astream,
219 AVCodecParameters *apar, int flv_codecid)
221 switch (flv_codecid) {
222 // no distinction between S16 and S8 PCM codec flags
223 case FLV_CODECID_PCM:
224 apar->codec_id = apar->bits_per_coded_sample == 8
227 : AV_CODEC_ID_PCM_S16BE;
229 : AV_CODEC_ID_PCM_S16LE;
232 case FLV_CODECID_PCM_LE:
233 apar->codec_id = apar->bits_per_coded_sample == 8
235 : AV_CODEC_ID_PCM_S16LE;
237 case FLV_CODECID_AAC:
238 apar->codec_id = AV_CODEC_ID_AAC;
240 case FLV_CODECID_ADPCM:
241 apar->codec_id = AV_CODEC_ID_ADPCM_SWF;
243 case FLV_CODECID_SPEEX:
244 apar->codec_id = AV_CODEC_ID_SPEEX;
245 apar->sample_rate = 16000;
247 case FLV_CODECID_MP3:
248 apar->codec_id = AV_CODEC_ID_MP3;
249 astream->need_parsing = AVSTREAM_PARSE_FULL;
251 case FLV_CODECID_NELLYMOSER_8KHZ_MONO:
252 // in case metadata does not otherwise declare samplerate
253 apar->sample_rate = 8000;
254 apar->codec_id = AV_CODEC_ID_NELLYMOSER;
256 case FLV_CODECID_NELLYMOSER_16KHZ_MONO:
257 apar->sample_rate = 16000;
258 apar->codec_id = AV_CODEC_ID_NELLYMOSER;
260 case FLV_CODECID_NELLYMOSER:
261 apar->codec_id = AV_CODEC_ID_NELLYMOSER;
263 case FLV_CODECID_PCM_MULAW:
264 apar->sample_rate = 8000;
265 apar->codec_id = AV_CODEC_ID_PCM_MULAW;
267 case FLV_CODECID_PCM_ALAW:
268 apar->sample_rate = 8000;
269 apar->codec_id = AV_CODEC_ID_PCM_ALAW;
272 avpriv_request_sample(s, "Audio codec (%x)",
273 flv_codecid >> FLV_AUDIO_CODECID_OFFSET);
274 apar->codec_tag = flv_codecid >> FLV_AUDIO_CODECID_OFFSET;
278 static int flv_same_video_codec(AVCodecParameters *vpar, int flags)
280 int flv_codecid = flags & FLV_VIDEO_CODECID_MASK;
282 if (!vpar->codec_id && !vpar->codec_tag)
285 switch (flv_codecid) {
286 case FLV_CODECID_H263:
287 return vpar->codec_id == AV_CODEC_ID_FLV1;
288 case FLV_CODECID_SCREEN:
289 return vpar->codec_id == AV_CODEC_ID_FLASHSV;
290 case FLV_CODECID_SCREEN2:
291 return vpar->codec_id == AV_CODEC_ID_FLASHSV2;
292 case FLV_CODECID_VP6:
293 return vpar->codec_id == AV_CODEC_ID_VP6F;
294 case FLV_CODECID_VP6A:
295 return vpar->codec_id == AV_CODEC_ID_VP6A;
296 case FLV_CODECID_H264:
297 return vpar->codec_id == AV_CODEC_ID_H264;
299 return vpar->codec_tag == flv_codecid;
303 static int flv_set_video_codec(AVFormatContext *s, AVStream *vstream,
304 int flv_codecid, int read)
307 AVCodecParameters *par = vstream->codecpar;
308 enum AVCodecID old_codec_id = vstream->codecpar->codec_id;
309 switch (flv_codecid) {
310 case FLV_CODECID_H263:
311 par->codec_id = AV_CODEC_ID_FLV1;
313 case FLV_CODECID_REALH263:
314 par->codec_id = AV_CODEC_ID_H263;
315 break; // Really mean it this time
316 case FLV_CODECID_SCREEN:
317 par->codec_id = AV_CODEC_ID_FLASHSV;
319 case FLV_CODECID_SCREEN2:
320 par->codec_id = AV_CODEC_ID_FLASHSV2;
322 case FLV_CODECID_VP6:
323 par->codec_id = AV_CODEC_ID_VP6F;
324 case FLV_CODECID_VP6A:
325 if (flv_codecid == FLV_CODECID_VP6A)
326 par->codec_id = AV_CODEC_ID_VP6A;
328 if (par->extradata_size != 1) {
329 ff_alloc_extradata(par, 1);
332 par->extradata[0] = avio_r8(s->pb);
336 ret = 1; // 1 byte body size adjustment for flv_read_packet()
338 case FLV_CODECID_H264:
339 par->codec_id = AV_CODEC_ID_H264;
340 vstream->need_parsing = AVSTREAM_PARSE_HEADERS;
341 ret = 3; // not 4, reading packet type will consume one byte
343 case FLV_CODECID_MPEG4:
344 par->codec_id = AV_CODEC_ID_MPEG4;
348 avpriv_request_sample(s, "Video codec (%x)", flv_codecid);
349 par->codec_tag = flv_codecid;
352 if (!vstream->internal->need_context_update && par->codec_id != old_codec_id) {
353 avpriv_request_sample(s, "Changing the codec id midstream");
354 return AVERROR_PATCHWELCOME;
360 static int amf_get_string(AVIOContext *ioc, char *buffer, int buffsize)
362 int length = avio_rb16(ioc);
363 if (length >= buffsize) {
364 avio_skip(ioc, length);
368 avio_read(ioc, buffer, length);
370 buffer[length] = '\0';
375 static int parse_keyframes_index(AVFormatContext *s, AVIOContext *ioc, int64_t max_pos)
377 FLVContext *flv = s->priv_data;
378 unsigned int timeslen = 0, fileposlen = 0, i;
380 int64_t *times = NULL;
381 int64_t *filepositions = NULL;
382 int ret = AVERROR(ENOSYS);
383 int64_t initial_pos = avio_tell(ioc);
385 if (flv->keyframe_count > 0) {
386 av_log(s, AV_LOG_DEBUG, "keyframes have been paresed\n");
389 av_assert0(!flv->keyframe_times);
390 av_assert0(!flv->keyframe_filepositions);
392 if (s->flags & AVFMT_FLAG_IGNIDX)
395 while (avio_tell(ioc) < max_pos - 2 &&
396 amf_get_string(ioc, str_val, sizeof(str_val)) > 0) {
397 int64_t **current_array;
398 unsigned int arraylen;
400 // Expect array object in context
401 if (avio_r8(ioc) != AMF_DATA_TYPE_ARRAY)
404 arraylen = avio_rb32(ioc);
408 if (!strcmp(KEYFRAMES_TIMESTAMP_TAG , str_val) && !times) {
409 current_array = ×
411 } else if (!strcmp(KEYFRAMES_BYTEOFFSET_TAG, str_val) &&
413 current_array = &filepositions;
414 fileposlen = arraylen;
416 // unexpected metatag inside keyframes, will not use such
417 // metadata for indexing
420 if (!(*current_array = av_mallocz(sizeof(**current_array) * arraylen))) {
421 ret = AVERROR(ENOMEM);
425 for (i = 0; i < arraylen && avio_tell(ioc) < max_pos - 1; i++) {
426 if (avio_r8(ioc) != AMF_DATA_TYPE_NUMBER)
428 current_array[0][i] = av_int2double(avio_rb64(ioc));
430 if (times && filepositions) {
431 // All done, exiting at a position allowing amf_parse_object
432 // to finish parsing the object
438 if (timeslen == fileposlen && fileposlen>1 && max_pos <= filepositions[0]) {
439 for (i = 0; i < FFMIN(2,fileposlen); i++) {
440 flv->validate_index[i].pos = filepositions[i];
441 flv->validate_index[i].dts = times[i] * 1000;
442 flv->validate_count = i + 1;
444 flv->keyframe_times = times;
445 flv->keyframe_filepositions = filepositions;
446 flv->keyframe_count = timeslen;
448 filepositions = NULL;
451 av_log(s, AV_LOG_WARNING, "Invalid keyframes object, skipping.\n");
456 av_freep(&filepositions);
457 avio_seek(ioc, initial_pos, SEEK_SET);
461 static int amf_parse_object(AVFormatContext *s, AVStream *astream,
462 AVStream *vstream, const char *key,
463 int64_t max_pos, int depth)
465 AVCodecParameters *apar, *vpar;
466 FLVContext *flv = s->priv_data;
468 AMFDataType amf_type;
474 amf_type = avio_r8(ioc);
477 case AMF_DATA_TYPE_NUMBER:
478 num_val = av_int2double(avio_rb64(ioc));
480 case AMF_DATA_TYPE_BOOL:
481 num_val = avio_r8(ioc);
483 case AMF_DATA_TYPE_STRING:
484 if (amf_get_string(ioc, str_val, sizeof(str_val)) < 0) {
485 av_log(s, AV_LOG_ERROR, "AMF_DATA_TYPE_STRING parsing failed\n");
489 case AMF_DATA_TYPE_OBJECT:
491 (ioc->seekable & AVIO_SEEKABLE_NORMAL) &&
492 !strcmp(KEYFRAMES_TAG, key) && depth == 1)
493 if (parse_keyframes_index(s, ioc,
495 av_log(s, AV_LOG_ERROR, "Keyframe index parsing failed\n");
497 add_keyframes_index(s);
498 while (avio_tell(ioc) < max_pos - 2 &&
499 amf_get_string(ioc, str_val, sizeof(str_val)) > 0)
500 if (amf_parse_object(s, astream, vstream, str_val, max_pos,
502 return -1; // if we couldn't skip, bomb out.
503 if (avio_r8(ioc) != AMF_END_OF_OBJECT) {
504 av_log(s, AV_LOG_ERROR, "Missing AMF_END_OF_OBJECT in AMF_DATA_TYPE_OBJECT\n");
508 case AMF_DATA_TYPE_NULL:
509 case AMF_DATA_TYPE_UNDEFINED:
510 case AMF_DATA_TYPE_UNSUPPORTED:
511 break; // these take up no additional space
512 case AMF_DATA_TYPE_MIXEDARRAY:
515 avio_skip(ioc, 4); // skip 32-bit max array index
516 while (avio_tell(ioc) < max_pos - 2 &&
517 amf_get_string(ioc, str_val, sizeof(str_val)) > 0)
518 // this is the only case in which we would want a nested
519 // parse to not skip over the object
520 if (amf_parse_object(s, astream, vstream, str_val, max_pos,
524 if (v != AMF_END_OF_OBJECT) {
525 av_log(s, AV_LOG_ERROR, "Missing AMF_END_OF_OBJECT in AMF_DATA_TYPE_MIXEDARRAY, found %d\n", v);
530 case AMF_DATA_TYPE_ARRAY:
532 unsigned int arraylen, i;
534 arraylen = avio_rb32(ioc);
535 for (i = 0; i < arraylen && avio_tell(ioc) < max_pos - 1; i++)
536 if (amf_parse_object(s, NULL, NULL, NULL, max_pos,
538 return -1; // if we couldn't skip, bomb out.
541 case AMF_DATA_TYPE_DATE:
542 avio_skip(ioc, 8 + 2); // timestamp (double) and UTC offset (int16)
544 default: // unsupported type, we couldn't skip
545 av_log(s, AV_LOG_ERROR, "unsupported amf type %d\n", amf_type);
550 apar = astream ? astream->codecpar : NULL;
551 vpar = vstream ? vstream->codecpar : NULL;
553 // stream info doesn't live any deeper than the first object
555 if (amf_type == AMF_DATA_TYPE_NUMBER ||
556 amf_type == AMF_DATA_TYPE_BOOL) {
557 if (!strcmp(key, "duration"))
558 s->duration = num_val * AV_TIME_BASE;
559 else if (!strcmp(key, "videodatarate") &&
560 0 <= (int)(num_val * 1024.0))
561 flv->video_bit_rate = num_val * 1024.0;
562 else if (!strcmp(key, "audiodatarate") &&
563 0 <= (int)(num_val * 1024.0))
564 flv->audio_bit_rate = num_val * 1024.0;
565 else if (!strcmp(key, "datastream")) {
566 AVStream *st = create_stream(s, AVMEDIA_TYPE_SUBTITLE);
568 return AVERROR(ENOMEM);
569 st->codecpar->codec_id = AV_CODEC_ID_TEXT;
570 } else if (!strcmp(key, "framerate")) {
571 flv->framerate = av_d2q(num_val, 1000);
573 vstream->avg_frame_rate = flv->framerate;
574 } else if (flv->trust_metadata) {
575 if (!strcmp(key, "videocodecid") && vpar) {
576 int ret = flv_set_video_codec(s, vstream, num_val, 0);
579 } else if (!strcmp(key, "audiocodecid") && apar) {
580 int id = ((int)num_val) << FLV_AUDIO_CODECID_OFFSET;
581 flv_set_audio_codec(s, astream, apar, id);
582 } else if (!strcmp(key, "audiosamplerate") && apar) {
583 apar->sample_rate = num_val;
584 } else if (!strcmp(key, "audiosamplesize") && apar) {
585 apar->bits_per_coded_sample = num_val;
586 } else if (!strcmp(key, "stereo") && apar) {
587 apar->channels = num_val + 1;
588 apar->channel_layout = apar->channels == 2 ?
589 AV_CH_LAYOUT_STEREO :
591 } else if (!strcmp(key, "width") && vpar) {
592 vpar->width = num_val;
593 } else if (!strcmp(key, "height") && vpar) {
594 vpar->height = num_val;
598 if (amf_type == AMF_DATA_TYPE_STRING) {
599 if (!strcmp(key, "encoder")) {
601 if (1 == sscanf(str_val, "Open Broadcaster Software v0.%d", &version)) {
602 if (version > 0 && version <= 655)
603 flv->broken_sizes = 1;
605 } else if (!strcmp(key, "metadatacreator")) {
606 if ( !strcmp (str_val, "MEGA")
607 || !strncmp(str_val, "FlixEngine", 10))
608 flv->broken_sizes = 1;
613 if (amf_type == AMF_DATA_TYPE_OBJECT && s->nb_streams == 1 &&
614 ((!apar && !strcmp(key, "audiocodecid")) ||
615 (!vpar && !strcmp(key, "videocodecid"))))
616 s->ctx_flags &= ~AVFMTCTX_NOHEADER; //If there is either audio/video missing, codecid will be an empty object
618 if ((!strcmp(key, "duration") ||
619 !strcmp(key, "filesize") ||
620 !strcmp(key, "width") ||
621 !strcmp(key, "height") ||
622 !strcmp(key, "videodatarate") ||
623 !strcmp(key, "framerate") ||
624 !strcmp(key, "videocodecid") ||
625 !strcmp(key, "audiodatarate") ||
626 !strcmp(key, "audiosamplerate") ||
627 !strcmp(key, "audiosamplesize") ||
628 !strcmp(key, "stereo") ||
629 !strcmp(key, "audiocodecid") ||
630 !strcmp(key, "datastream")) && !flv->dump_full_metadata)
633 s->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
634 if (amf_type == AMF_DATA_TYPE_BOOL) {
635 av_strlcpy(str_val, num_val > 0 ? "true" : "false",
637 av_dict_set(&s->metadata, key, str_val, 0);
638 } else if (amf_type == AMF_DATA_TYPE_NUMBER) {
639 snprintf(str_val, sizeof(str_val), "%.f", num_val);
640 av_dict_set(&s->metadata, key, str_val, 0);
641 } else if (amf_type == AMF_DATA_TYPE_STRING)
642 av_dict_set(&s->metadata, key, str_val, 0);
648 #define TYPE_ONTEXTDATA 1
649 #define TYPE_ONCAPTION 2
650 #define TYPE_ONCAPTIONINFO 3
651 #define TYPE_UNKNOWN 9
653 static int flv_read_metabody(AVFormatContext *s, int64_t next_pos)
655 FLVContext *flv = s->priv_data;
657 AVStream *stream, *astream, *vstream;
658 AVStream av_unused *dstream;
668 // first object needs to be "onMetaData" string
670 if (type != AMF_DATA_TYPE_STRING ||
671 amf_get_string(ioc, buffer, sizeof(buffer)) < 0)
674 if (!strcmp(buffer, "onTextData"))
675 return TYPE_ONTEXTDATA;
677 if (!strcmp(buffer, "onCaption"))
678 return TYPE_ONCAPTION;
680 if (!strcmp(buffer, "onCaptionInfo"))
681 return TYPE_ONCAPTIONINFO;
683 if (strcmp(buffer, "onMetaData") && strcmp(buffer, "onCuePoint")) {
684 av_log(s, AV_LOG_DEBUG, "Unknown type %s\n", buffer);
688 // find the streams now so that amf_parse_object doesn't need to do
689 // the lookup every time it is called.
690 for (i = 0; i < s->nb_streams; i++) {
691 stream = s->streams[i];
692 if (stream->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
694 flv->last_keyframe_stream_index = i;
695 } else if (stream->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
697 if (flv->last_keyframe_stream_index == -1)
698 flv->last_keyframe_stream_index = i;
700 else if (stream->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE)
704 // parse the second object (we want a mixed array)
705 if (amf_parse_object(s, astream, vstream, buffer, next_pos, 0) < 0)
711 static int flv_read_header(AVFormatContext *s)
714 FLVContext *flv = s->priv_data;
716 int pre_tag_size = 0;
719 flags = avio_r8(s->pb);
721 flv->missing_streams = flags & (FLV_HEADER_FLAG_HASVIDEO | FLV_HEADER_FLAG_HASAUDIO);
723 s->ctx_flags |= AVFMTCTX_NOHEADER;
725 offset = avio_rb32(s->pb);
726 avio_seek(s->pb, offset, SEEK_SET);
728 /* Annex E. The FLV File Format
731 * PreviousTagSize0 UI32 Always 0
733 pre_tag_size = avio_rb32(s->pb);
735 av_log(s, AV_LOG_WARNING, "Read FLV header error, input file is not a standard flv format, first PreviousTagSize0 always is 0\n");
739 flv->sum_flv_tag_size = 0;
740 flv->last_keyframe_stream_index = -1;
745 static int flv_read_close(AVFormatContext *s)
748 FLVContext *flv = s->priv_data;
749 for (i=0; i<FLV_STREAM_TYPE_NB; i++)
750 av_freep(&flv->new_extradata[i]);
751 av_freep(&flv->keyframe_times);
752 av_freep(&flv->keyframe_filepositions);
756 static int flv_get_extradata(AVFormatContext *s, AVStream *st, int size)
761 av_freep(&st->codecpar->extradata);
762 if (ff_get_extradata(s, st->codecpar, s->pb, size) < 0)
763 return AVERROR(ENOMEM);
764 st->internal->need_context_update = 1;
768 static int flv_queue_extradata(FLVContext *flv, AVIOContext *pb, int stream,
774 av_free(flv->new_extradata[stream]);
775 flv->new_extradata[stream] = av_mallocz(size +
776 AV_INPUT_BUFFER_PADDING_SIZE);
777 if (!flv->new_extradata[stream])
778 return AVERROR(ENOMEM);
779 flv->new_extradata_size[stream] = size;
780 avio_read(pb, flv->new_extradata[stream], size);
784 static void clear_index_entries(AVFormatContext *s, int64_t pos)
787 av_log(s, AV_LOG_WARNING,
788 "Found invalid index entries, clearing the index.\n");
789 for (i = 0; i < s->nb_streams; i++) {
790 AVStream *st = s->streams[i];
791 /* Remove all index entries that point to >= pos */
793 for (j = 0; j < st->nb_index_entries; j++)
794 if (st->index_entries[j].pos < pos)
795 st->index_entries[out++] = st->index_entries[j];
796 st->nb_index_entries = out;
800 static int amf_skip_tag(AVIOContext *pb, AMFDataType type)
802 int nb = -1, ret, parse_name = 1;
805 case AMF_DATA_TYPE_NUMBER:
808 case AMF_DATA_TYPE_BOOL:
811 case AMF_DATA_TYPE_STRING:
812 avio_skip(pb, avio_rb16(pb));
814 case AMF_DATA_TYPE_ARRAY:
816 case AMF_DATA_TYPE_MIXEDARRAY:
818 case AMF_DATA_TYPE_OBJECT:
819 while(!pb->eof_reached && (nb-- > 0 || type != AMF_DATA_TYPE_ARRAY)) {
821 int size = avio_rb16(pb);
828 if ((ret = amf_skip_tag(pb, avio_r8(pb))) < 0)
832 case AMF_DATA_TYPE_NULL:
833 case AMF_DATA_TYPE_OBJECT_END:
836 return AVERROR_INVALIDDATA;
841 static int flv_data_packet(AVFormatContext *s, AVPacket *pkt,
842 int64_t dts, int64_t next)
844 AVIOContext *pb = s->pb;
847 int ret = AVERROR_INVALIDDATA;
851 switch (avio_r8(pb)) {
852 case AMF_DATA_TYPE_ARRAY:
854 case AMF_DATA_TYPE_MIXEDARRAY:
855 avio_seek(pb, 4, SEEK_CUR);
856 case AMF_DATA_TYPE_OBJECT:
862 while (array || (ret = amf_get_string(pb, buf, sizeof(buf))) > 0) {
863 AMFDataType type = avio_r8(pb);
864 if (type == AMF_DATA_TYPE_STRING && (array || !strcmp(buf, "text"))) {
865 length = avio_rb16(pb);
866 ret = av_get_packet(pb, pkt, length);
872 if ((ret = amf_skip_tag(pb, type)) < 0)
878 ret = AVERROR_INVALIDDATA;
882 for (i = 0; i < s->nb_streams; i++) {
884 if (st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE)
888 if (i == s->nb_streams) {
889 st = create_stream(s, AVMEDIA_TYPE_SUBTITLE);
891 return AVERROR(ENOMEM);
892 st->codecpar->codec_id = AV_CODEC_ID_TEXT;
899 pkt->stream_index = st->index;
900 pkt->flags |= AV_PKT_FLAG_KEY;
903 avio_seek(s->pb, next + 4, SEEK_SET);
908 static int resync(AVFormatContext *s)
910 FLVContext *flv = s->priv_data;
912 int64_t pos = avio_tell(s->pb);
914 for (i=0; !avio_feof(s->pb); i++) {
915 int j = i & (RESYNC_BUFFER_SIZE-1);
916 int j1 = j + RESYNC_BUFFER_SIZE;
917 flv->resync_buffer[j ] =
918 flv->resync_buffer[j1] = avio_r8(s->pb);
921 unsigned lsize2 = AV_RB32(flv->resync_buffer + j1 - 4);
922 if (lsize2 >= 11 && lsize2 + 8LL < FFMIN(i, RESYNC_BUFFER_SIZE)) {
923 unsigned size2 = AV_RB24(flv->resync_buffer + j1 - lsize2 + 1 - 4);
924 unsigned lsize1 = AV_RB32(flv->resync_buffer + j1 - lsize2 - 8);
925 if (lsize1 >= 11 && lsize1 + 8LL + lsize2 < FFMIN(i, RESYNC_BUFFER_SIZE)) {
926 unsigned size1 = AV_RB24(flv->resync_buffer + j1 - lsize1 + 1 - lsize2 - 8);
927 if (size1 == lsize1 - 11 && size2 == lsize2 - 11) {
928 avio_seek(s->pb, pos + i - lsize1 - lsize2 - 8, SEEK_SET);
938 static int flv_read_packet(AVFormatContext *s, AVPacket *pkt)
940 FLVContext *flv = s->priv_data;
941 int ret, i, size, flags;
942 enum FlvTagType type;
944 int64_t next, pos, meta_pos;
945 int64_t dts, pts = AV_NOPTS_VALUE;
946 int av_uninit(channels);
947 int av_uninit(sample_rate);
953 /* pkt size is repeated at end. skip it */
954 pos = avio_tell(s->pb);
955 type = (avio_r8(s->pb) & 0x1F);
957 size = avio_rb24(s->pb);
958 flv->sum_flv_tag_size += size + 11;
959 dts = avio_rb24(s->pb);
960 dts |= (unsigned)avio_r8(s->pb) << 24;
961 av_log(s, AV_LOG_TRACE, "type:%d, size:%d, last:%d, dts:%"PRId64" pos:%"PRId64"\n", type, size, last, dts, avio_tell(s->pb));
962 if (avio_feof(s->pb))
964 avio_skip(s->pb, 3); /* stream id, always 0 */
967 if (flv->validate_next < flv->validate_count) {
968 int64_t validate_pos = flv->validate_index[flv->validate_next].pos;
969 if (pos == validate_pos) {
970 if (FFABS(dts - flv->validate_index[flv->validate_next].dts) <=
971 VALIDATE_INDEX_TS_THRESH) {
972 flv->validate_next++;
974 clear_index_entries(s, validate_pos);
975 flv->validate_count = 0;
977 } else if (pos > validate_pos) {
978 clear_index_entries(s, validate_pos);
979 flv->validate_count = 0;
988 next = size + avio_tell(s->pb);
990 if (type == FLV_TAG_TYPE_AUDIO) {
991 stream_type = FLV_STREAM_TYPE_AUDIO;
992 flags = avio_r8(s->pb);
994 } else if (type == FLV_TAG_TYPE_VIDEO) {
995 stream_type = FLV_STREAM_TYPE_VIDEO;
996 flags = avio_r8(s->pb);
998 if ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_VIDEO_INFO_CMD)
1000 } else if (type == FLV_TAG_TYPE_META) {
1001 stream_type=FLV_STREAM_TYPE_SUBTITLE;
1002 if (size > 13 + 1 + 4) { // Header-type metadata stuff
1004 meta_pos = avio_tell(s->pb);
1005 type = flv_read_metabody(s, next);
1006 if (type == 0 && dts == 0 || type < 0) {
1007 if (type < 0 && flv->validate_count &&
1008 flv->validate_index[0].pos > next &&
1009 flv->validate_index[0].pos - 4 < next
1011 av_log(s, AV_LOG_WARNING, "Adjusting next position due to index mismatch\n");
1012 next = flv->validate_index[0].pos - 4;
1015 } else if (type == TYPE_ONTEXTDATA) {
1016 avpriv_request_sample(s, "OnTextData packet");
1017 return flv_data_packet(s, pkt, dts, next);
1018 } else if (type == TYPE_ONCAPTION) {
1019 return flv_data_packet(s, pkt, dts, next);
1020 } else if (type == TYPE_UNKNOWN) {
1021 stream_type = FLV_STREAM_TYPE_DATA;
1023 avio_seek(s->pb, meta_pos, SEEK_SET);
1026 av_log(s, AV_LOG_DEBUG,
1027 "Skipping flv packet: type %d, size %d, flags %d.\n",
1030 if (avio_seek(s->pb, next, SEEK_SET) != next) {
1031 // This can happen if flv_read_metabody above read past
1032 // next, on a non-seekable input, and the preceding data has
1033 // been flushed out from the IO buffer.
1034 av_log(s, AV_LOG_ERROR, "Unable to seek to the next packet\n");
1035 return AVERROR_INVALIDDATA;
1041 /* skip empty data packets */
1047 /* now find stream */
1048 for (i = 0; i < s->nb_streams; i++) {
1050 if (stream_type == FLV_STREAM_TYPE_AUDIO) {
1051 if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
1052 (s->audio_codec_id || flv_same_audio_codec(st->codecpar, flags)))
1054 } else if (stream_type == FLV_STREAM_TYPE_VIDEO) {
1055 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
1056 (s->video_codec_id || flv_same_video_codec(st->codecpar, flags)))
1058 } else if (stream_type == FLV_STREAM_TYPE_SUBTITLE) {
1059 if (st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE)
1061 } else if (stream_type == FLV_STREAM_TYPE_DATA) {
1062 if (st->codecpar->codec_type == AVMEDIA_TYPE_DATA)
1066 if (i == s->nb_streams) {
1067 static const enum AVMediaType stream_types[] = {AVMEDIA_TYPE_VIDEO, AVMEDIA_TYPE_AUDIO, AVMEDIA_TYPE_SUBTITLE, AVMEDIA_TYPE_DATA};
1068 st = create_stream(s, stream_types[stream_type]);
1070 return AVERROR(ENOMEM);
1073 av_log(s, AV_LOG_TRACE, "%d %X %d \n", stream_type, flags, st->discard);
1075 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) &&
1076 ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY ||
1077 stream_type == FLV_STREAM_TYPE_AUDIO))
1078 av_add_index_entry(st, pos, dts, size, 0, AVINDEX_KEYFRAME);
1080 if ( (st->discard >= AVDISCARD_NONKEY && !((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY || (stream_type == FLV_STREAM_TYPE_AUDIO)))
1081 ||(st->discard >= AVDISCARD_BIDIR && ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_DISP_INTER && (stream_type == FLV_STREAM_TYPE_VIDEO)))
1082 || st->discard >= AVDISCARD_ALL
1084 avio_seek(s->pb, next, SEEK_SET);
1089 // if not streamed and no duration from metadata then seek to end to find
1090 // the duration from the timestamps
1091 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) &&
1092 (!s->duration || s->duration == AV_NOPTS_VALUE) &&
1093 !flv->searched_for_end) {
1095 const int64_t pos = avio_tell(s->pb);
1096 // Read the last 4 bytes of the file, this should be the size of the
1097 // previous FLV tag. Use the timestamp of its payload as duration.
1098 int64_t fsize = avio_size(s->pb);
1100 avio_seek(s->pb, fsize - 4, SEEK_SET);
1101 size = avio_rb32(s->pb);
1102 if (size > 0 && size < fsize) {
1103 // Seek to the start of the last FLV tag at position (fsize - 4 - size)
1104 // but skip the byte indicating the type.
1105 avio_seek(s->pb, fsize - 3 - size, SEEK_SET);
1106 if (size == avio_rb24(s->pb) + 11) {
1107 uint32_t ts = avio_rb24(s->pb);
1108 ts |= avio_r8(s->pb) << 24;
1110 s->duration = ts * (int64_t)AV_TIME_BASE / 1000;
1111 else if (fsize >= 8 && fsize - 8 >= size) {
1113 goto retry_duration;
1118 avio_seek(s->pb, pos, SEEK_SET);
1119 flv->searched_for_end = 1;
1122 if (stream_type == FLV_STREAM_TYPE_AUDIO) {
1123 int bits_per_coded_sample;
1124 channels = (flags & FLV_AUDIO_CHANNEL_MASK) == FLV_STEREO ? 2 : 1;
1125 sample_rate = 44100 << ((flags & FLV_AUDIO_SAMPLERATE_MASK) >>
1126 FLV_AUDIO_SAMPLERATE_OFFSET) >> 3;
1127 bits_per_coded_sample = (flags & FLV_AUDIO_SAMPLESIZE_MASK) ? 16 : 8;
1128 if (!st->codecpar->channels || !st->codecpar->sample_rate ||
1129 !st->codecpar->bits_per_coded_sample) {
1130 st->codecpar->channels = channels;
1131 st->codecpar->channel_layout = channels == 1
1133 : AV_CH_LAYOUT_STEREO;
1134 st->codecpar->sample_rate = sample_rate;
1135 st->codecpar->bits_per_coded_sample = bits_per_coded_sample;
1137 if (!st->codecpar->codec_id) {
1138 flv_set_audio_codec(s, st, st->codecpar,
1139 flags & FLV_AUDIO_CODECID_MASK);
1140 flv->last_sample_rate =
1141 sample_rate = st->codecpar->sample_rate;
1142 flv->last_channels =
1143 channels = st->codecpar->channels;
1145 AVCodecParameters *par = avcodec_parameters_alloc();
1147 ret = AVERROR(ENOMEM);
1150 par->sample_rate = sample_rate;
1151 par->bits_per_coded_sample = bits_per_coded_sample;
1152 flv_set_audio_codec(s, st, par, flags & FLV_AUDIO_CODECID_MASK);
1153 sample_rate = par->sample_rate;
1154 avcodec_parameters_free(&par);
1156 } else if (stream_type == FLV_STREAM_TYPE_VIDEO) {
1157 int ret = flv_set_video_codec(s, st, flags & FLV_VIDEO_CODECID_MASK, 1);
1161 } else if (stream_type == FLV_STREAM_TYPE_SUBTITLE) {
1162 st->codecpar->codec_id = AV_CODEC_ID_TEXT;
1163 } else if (stream_type == FLV_STREAM_TYPE_DATA) {
1164 st->codecpar->codec_id = AV_CODEC_ID_NONE; // Opaque AMF data
1167 if (st->codecpar->codec_id == AV_CODEC_ID_AAC ||
1168 st->codecpar->codec_id == AV_CODEC_ID_H264 ||
1169 st->codecpar->codec_id == AV_CODEC_ID_MPEG4) {
1170 int type = avio_r8(s->pb);
1174 ret = AVERROR_INVALIDDATA;
1178 if (st->codecpar->codec_id == AV_CODEC_ID_H264 || st->codecpar->codec_id == AV_CODEC_ID_MPEG4) {
1180 int32_t cts = (avio_rb24(s->pb) + 0xff800000) ^ 0xff800000;
1182 if (cts < 0) { // dts might be wrong
1183 if (!flv->wrong_dts)
1184 av_log(s, AV_LOG_WARNING,
1185 "Negative cts, previous timestamps might be wrong.\n");
1187 } else if (FFABS(dts - pts) > 1000*60*15) {
1188 av_log(s, AV_LOG_WARNING,
1189 "invalid timestamps %"PRId64" %"PRId64"\n", dts, pts);
1190 dts = pts = AV_NOPTS_VALUE;
1193 if (type == 0 && (!st->codecpar->extradata || st->codecpar->codec_id == AV_CODEC_ID_AAC ||
1194 st->codecpar->codec_id == AV_CODEC_ID_H264)) {
1195 AVDictionaryEntry *t;
1197 if (st->codecpar->extradata) {
1198 if ((ret = flv_queue_extradata(flv, s->pb, stream_type, size)) < 0)
1203 if ((ret = flv_get_extradata(s, st, size)) < 0)
1206 /* Workaround for buggy Omnia A/XE encoder */
1207 t = av_dict_get(s->metadata, "Encoder", NULL, 0);
1208 if (st->codecpar->codec_id == AV_CODEC_ID_AAC && t && !strcmp(t->value, "Omnia A/XE"))
1209 st->codecpar->extradata_size = 2;
1211 if (st->codecpar->codec_id == AV_CODEC_ID_AAC && 0) {
1212 MPEG4AudioConfig cfg;
1214 if (avpriv_mpeg4audio_get_config(&cfg, st->codecpar->extradata,
1215 st->codecpar->extradata_size * 8, 1) >= 0) {
1216 st->codecpar->channels = cfg.channels;
1217 st->codecpar->channel_layout = 0;
1218 if (cfg.ext_sample_rate)
1219 st->codecpar->sample_rate = cfg.ext_sample_rate;
1221 st->codecpar->sample_rate = cfg.sample_rate;
1222 av_log(s, AV_LOG_TRACE, "mp4a config channels %d sample rate %d\n",
1223 st->codecpar->channels, st->codecpar->sample_rate);
1232 /* skip empty data packets */
1238 ret = av_get_packet(s->pb, pkt, size);
1242 pkt->pts = pts == AV_NOPTS_VALUE ? dts : pts;
1243 pkt->stream_index = st->index;
1245 if (flv->new_extradata[stream_type]) {
1246 uint8_t *side = av_packet_new_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA,
1247 flv->new_extradata_size[stream_type]);
1249 memcpy(side, flv->new_extradata[stream_type],
1250 flv->new_extradata_size[stream_type]);
1251 av_freep(&flv->new_extradata[stream_type]);
1252 flv->new_extradata_size[stream_type] = 0;
1255 if (stream_type == FLV_STREAM_TYPE_AUDIO &&
1256 (sample_rate != flv->last_sample_rate ||
1257 channels != flv->last_channels)) {
1258 flv->last_sample_rate = sample_rate;
1259 flv->last_channels = channels;
1260 ff_add_param_change(pkt, channels, 0, sample_rate, 0, 0);
1263 if ( stream_type == FLV_STREAM_TYPE_AUDIO ||
1264 ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY) ||
1265 stream_type == FLV_STREAM_TYPE_SUBTITLE ||
1266 stream_type == FLV_STREAM_TYPE_DATA)
1267 pkt->flags |= AV_PKT_FLAG_KEY;
1270 last = avio_rb32(s->pb);
1271 if (!flv->trust_datasize) {
1272 if (last != orig_size + 11 && last != orig_size + 10 &&
1273 !avio_feof(s->pb) &&
1274 (last != orig_size || !last) && last != flv->sum_flv_tag_size &&
1275 !flv->broken_sizes) {
1276 av_log(s, AV_LOG_ERROR, "Packet mismatch %d %d %d\n", last, orig_size + 11, flv->sum_flv_tag_size);
1277 avio_seek(s->pb, pos + 1, SEEK_SET);
1279 av_packet_unref(pkt);
1288 static int flv_read_seek(AVFormatContext *s, int stream_index,
1289 int64_t ts, int flags)
1291 FLVContext *flv = s->priv_data;
1292 flv->validate_count = 0;
1293 return avio_seek_time(s->pb, stream_index, ts, flags);
1296 #define OFFSET(x) offsetof(FLVContext, x)
1297 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
1298 static const AVOption options[] = {
1299 { "flv_metadata", "Allocate streams according to the onMetaData array", OFFSET(trust_metadata), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VD },
1300 { "flv_full_metadata", "Dump full metadata of the onMetadata", OFFSET(dump_full_metadata), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VD },
1301 { "flv_ignore_prevtag", "Ignore the Size of previous tag", OFFSET(trust_datasize), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VD },
1302 { "missing_streams", "", OFFSET(missing_streams), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 0xFF, VD | AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY },
1306 static const AVClass flv_class = {
1307 .class_name = "flvdec",
1308 .item_name = av_default_item_name,
1310 .version = LIBAVUTIL_VERSION_INT,
1313 AVInputFormat ff_flv_demuxer = {
1315 .long_name = NULL_IF_CONFIG_SMALL("FLV (Flash Video)"),
1316 .priv_data_size = sizeof(FLVContext),
1317 .read_probe = flv_probe,
1318 .read_header = flv_read_header,
1319 .read_packet = flv_read_packet,
1320 .read_seek = flv_read_seek,
1321 .read_close = flv_read_close,
1322 .extensions = "flv",
1323 .priv_class = &flv_class,
1326 static const AVClass live_flv_class = {
1327 .class_name = "live_flvdec",
1328 .item_name = av_default_item_name,
1330 .version = LIBAVUTIL_VERSION_INT,
1333 AVInputFormat ff_live_flv_demuxer = {
1335 .long_name = NULL_IF_CONFIG_SMALL("live RTMP FLV (Flash Video)"),
1336 .priv_data_size = sizeof(FLVContext),
1337 .read_probe = live_flv_probe,
1338 .read_header = flv_read_header,
1339 .read_packet = flv_read_packet,
1340 .read_seek = flv_read_seek,
1341 .read_close = flv_read_close,
1342 .extensions = "flv",
1343 .priv_class = &live_flv_class,
1344 .flags = AVFMT_TS_DISCONT