3 * Copyright (c) 2003 The FFmpeg Project
5 * This demuxer will generate a 1 byte extradata for VP6F content.
7 * - upper 4bits: difference between encoded width and visible width
8 * - lower 4bits: 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/dict.h"
29 #include "libavutil/opt.h"
30 #include "libavutil/intfloat.h"
31 #include "libavutil/mathematics.h"
32 #include "libavcodec/bytestream.h"
33 #include "libavcodec/mpeg4audio.h"
36 #include "avio_internal.h"
39 #define VALIDATE_INDEX_TS_THRESH 2500
42 const AVClass *class; ///< Class for private options.
43 int trust_metadata; ///< configure streams according onMetaData
44 int wrong_dts; ///< wrong dts due to negative cts
45 uint8_t *new_extradata[FLV_STREAM_TYPE_NB];
46 int new_extradata_size[FLV_STREAM_TYPE_NB];
58 static int flv_probe(AVProbeData *p)
63 if (d[0] == 'F' && d[1] == 'L' && d[2] == 'V' && d[3] < 5 && d[5]==0 && AV_RB32(d+5)>8) {
64 return AVPROBE_SCORE_MAX;
69 static AVStream *create_stream(AVFormatContext *s, int codec_type)
71 AVStream *st = avformat_new_stream(s, NULL);
74 st->codec->codec_type = codec_type;
75 if(s->nb_streams>=3 ||( s->nb_streams==2
76 && s->streams[0]->codec->codec_type != AVMEDIA_TYPE_DATA
77 && s->streams[1]->codec->codec_type != AVMEDIA_TYPE_DATA))
78 s->ctx_flags &= ~AVFMTCTX_NOHEADER;
80 avpriv_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
83 static int flv_same_audio_codec(AVCodecContext *acodec, int flags)
85 int bits_per_coded_sample = (flags & FLV_AUDIO_SAMPLESIZE_MASK) ? 16 : 8;
86 int flv_codecid = flags & FLV_AUDIO_CODECID_MASK;
89 if (!acodec->codec_id && !acodec->codec_tag)
92 if (acodec->bits_per_coded_sample != bits_per_coded_sample)
96 //no distinction between S16 and S8 PCM codec flags
98 codec_id = bits_per_coded_sample == 8 ? AV_CODEC_ID_PCM_U8 :
100 AV_CODEC_ID_PCM_S16BE;
102 AV_CODEC_ID_PCM_S16LE;
104 return codec_id == acodec->codec_id;
105 case FLV_CODECID_PCM_LE:
106 codec_id = bits_per_coded_sample == 8 ? AV_CODEC_ID_PCM_U8 : AV_CODEC_ID_PCM_S16LE;
107 return codec_id == acodec->codec_id;
108 case FLV_CODECID_AAC:
109 return acodec->codec_id == AV_CODEC_ID_AAC;
110 case FLV_CODECID_ADPCM:
111 return acodec->codec_id == AV_CODEC_ID_ADPCM_SWF;
112 case FLV_CODECID_SPEEX:
113 return acodec->codec_id == AV_CODEC_ID_SPEEX;
114 case FLV_CODECID_MP3:
115 return acodec->codec_id == AV_CODEC_ID_MP3;
116 case FLV_CODECID_NELLYMOSER_8KHZ_MONO:
117 case FLV_CODECID_NELLYMOSER_16KHZ_MONO:
118 case FLV_CODECID_NELLYMOSER:
119 return acodec->codec_id == AV_CODEC_ID_NELLYMOSER;
120 case FLV_CODECID_PCM_MULAW:
121 return acodec->sample_rate == 8000 &&
122 acodec->codec_id == AV_CODEC_ID_PCM_MULAW;
123 case FLV_CODECID_PCM_ALAW:
124 return acodec->sample_rate = 8000 &&
125 acodec->codec_id == AV_CODEC_ID_PCM_ALAW;
127 return acodec->codec_tag == (flv_codecid >> FLV_AUDIO_CODECID_OFFSET);
133 static void flv_set_audio_codec(AVFormatContext *s, AVStream *astream, AVCodecContext *acodec, int flv_codecid) {
134 switch(flv_codecid) {
135 //no distinction between S16 and S8 PCM codec flags
136 case FLV_CODECID_PCM:
137 acodec->codec_id = acodec->bits_per_coded_sample == 8 ? AV_CODEC_ID_PCM_U8 :
139 AV_CODEC_ID_PCM_S16BE;
141 AV_CODEC_ID_PCM_S16LE;
144 case FLV_CODECID_PCM_LE:
145 acodec->codec_id = acodec->bits_per_coded_sample == 8 ? AV_CODEC_ID_PCM_U8 : AV_CODEC_ID_PCM_S16LE; break;
146 case FLV_CODECID_AAC : acodec->codec_id = AV_CODEC_ID_AAC; break;
147 case FLV_CODECID_ADPCM: acodec->codec_id = AV_CODEC_ID_ADPCM_SWF; break;
148 case FLV_CODECID_SPEEX:
149 acodec->codec_id = AV_CODEC_ID_SPEEX;
150 acodec->sample_rate = 16000;
152 case FLV_CODECID_MP3 : acodec->codec_id = AV_CODEC_ID_MP3 ; astream->need_parsing = AVSTREAM_PARSE_FULL; break;
153 case FLV_CODECID_NELLYMOSER_8KHZ_MONO:
154 acodec->sample_rate = 8000; //in case metadata does not otherwise declare samplerate
155 acodec->codec_id = AV_CODEC_ID_NELLYMOSER;
157 case FLV_CODECID_NELLYMOSER_16KHZ_MONO:
158 acodec->sample_rate = 16000;
159 acodec->codec_id = AV_CODEC_ID_NELLYMOSER;
161 case FLV_CODECID_NELLYMOSER:
162 acodec->codec_id = AV_CODEC_ID_NELLYMOSER;
164 case FLV_CODECID_PCM_MULAW:
165 acodec->sample_rate = 8000;
166 acodec->codec_id = AV_CODEC_ID_PCM_MULAW;
168 case FLV_CODECID_PCM_ALAW:
169 acodec->sample_rate = 8000;
170 acodec->codec_id = AV_CODEC_ID_PCM_ALAW;
173 av_log(s, AV_LOG_INFO, "Unsupported audio codec (%x)\n", flv_codecid >> FLV_AUDIO_CODECID_OFFSET);
174 acodec->codec_tag = flv_codecid >> FLV_AUDIO_CODECID_OFFSET;
178 static int flv_same_video_codec(AVCodecContext *vcodec, int flags)
180 int flv_codecid = flags & FLV_VIDEO_CODECID_MASK;
182 if (!vcodec->codec_id && !vcodec->codec_tag)
185 switch (flv_codecid) {
186 case FLV_CODECID_H263:
187 return vcodec->codec_id == AV_CODEC_ID_FLV1;
188 case FLV_CODECID_SCREEN:
189 return vcodec->codec_id == AV_CODEC_ID_FLASHSV;
190 case FLV_CODECID_SCREEN2:
191 return vcodec->codec_id == AV_CODEC_ID_FLASHSV2;
192 case FLV_CODECID_VP6:
193 return vcodec->codec_id == AV_CODEC_ID_VP6F;
194 case FLV_CODECID_VP6A:
195 return vcodec->codec_id == AV_CODEC_ID_VP6A;
196 case FLV_CODECID_H264:
197 return vcodec->codec_id == AV_CODEC_ID_H264;
199 return vcodec->codec_tag == flv_codecid;
205 static int flv_set_video_codec(AVFormatContext *s, AVStream *vstream, int flv_codecid) {
206 AVCodecContext *vcodec = vstream->codec;
207 switch(flv_codecid) {
208 case FLV_CODECID_H263 : vcodec->codec_id = AV_CODEC_ID_FLV1 ; break;
209 case FLV_CODECID_REALH263: vcodec->codec_id = AV_CODEC_ID_H263 ; break; // Really mean it this time
210 case FLV_CODECID_SCREEN: vcodec->codec_id = AV_CODEC_ID_FLASHSV; break;
211 case FLV_CODECID_SCREEN2: vcodec->codec_id = AV_CODEC_ID_FLASHSV2; break;
212 case FLV_CODECID_VP6 : vcodec->codec_id = AV_CODEC_ID_VP6F ;
213 case FLV_CODECID_VP6A :
214 if(flv_codecid == FLV_CODECID_VP6A)
215 vcodec->codec_id = AV_CODEC_ID_VP6A;
216 if(vcodec->extradata_size != 1) {
217 vcodec->extradata_size = 1;
218 vcodec->extradata = av_malloc(1 + FF_INPUT_BUFFER_PADDING_SIZE);
220 vcodec->extradata[0] = avio_r8(s->pb);
221 return 1; // 1 byte body size adjustment for flv_read_packet()
222 case FLV_CODECID_H264:
223 vcodec->codec_id = AV_CODEC_ID_H264;
224 return 3; // not 4, reading packet type will consume one byte
225 case FLV_CODECID_MPEG4:
226 vcodec->codec_id = AV_CODEC_ID_MPEG4;
229 av_log(s, AV_LOG_INFO, "Unsupported video codec (%x)\n", flv_codecid);
230 vcodec->codec_tag = flv_codecid;
236 static int amf_get_string(AVIOContext *ioc, char *buffer, int buffsize) {
237 int length = avio_rb16(ioc);
238 if(length >= buffsize) {
239 avio_skip(ioc, length);
243 avio_read(ioc, buffer, length);
245 buffer[length] = '\0';
250 static int parse_keyframes_index(AVFormatContext *s, AVIOContext *ioc, AVStream *vstream, int64_t max_pos) {
251 FLVContext *flv = s->priv_data;
252 unsigned int timeslen = 0, fileposlen = 0, i;
254 int64_t *times = NULL;
255 int64_t *filepositions = NULL;
256 int ret = AVERROR(ENOSYS);
257 int64_t initial_pos = avio_tell(ioc);
259 if(vstream->nb_index_entries>0){
260 av_log(s, AV_LOG_WARNING, "Skiping duplicate index\n");
264 if (s->flags & AVFMT_FLAG_IGNIDX)
267 while (avio_tell(ioc) < max_pos - 2 && amf_get_string(ioc, str_val, sizeof(str_val)) > 0) {
268 int64_t** current_array;
269 unsigned int arraylen;
271 // Expect array object in context
272 if (avio_r8(ioc) != AMF_DATA_TYPE_ARRAY)
275 arraylen = avio_rb32(ioc);
279 if (!strcmp(KEYFRAMES_TIMESTAMP_TAG , str_val) && !times){
280 current_array= ×
282 }else if (!strcmp(KEYFRAMES_BYTEOFFSET_TAG, str_val) && !filepositions){
283 current_array= &filepositions;
284 fileposlen= arraylen;
285 }else // unexpected metatag inside keyframes, will not use such metadata for indexing
288 if (!(*current_array = av_mallocz(sizeof(**current_array) * arraylen))) {
289 ret = AVERROR(ENOMEM);
293 for (i = 0; i < arraylen && avio_tell(ioc) < max_pos - 1; i++) {
294 if (avio_r8(ioc) != AMF_DATA_TYPE_NUMBER)
296 current_array[0][i] = av_int2double(avio_rb64(ioc));
298 if (times && filepositions) {
299 // All done, exiting at a position allowing amf_parse_object
300 // to finish parsing the object
306 if (timeslen == fileposlen && fileposlen>1 && max_pos <= filepositions[0]) {
307 for (i = 0; i < fileposlen; i++) {
308 av_add_index_entry(vstream, filepositions[i], times[i]*1000,
309 0, 0, AVINDEX_KEYFRAME);
311 flv->validate_index[i].pos = filepositions[i];
312 flv->validate_index[i].dts = times[i] * 1000;
313 flv->validate_count = i + 1;
318 av_log(s, AV_LOG_WARNING, "Invalid keyframes object, skipping.\n");
323 av_freep(&filepositions);
324 avio_seek(ioc, initial_pos, SEEK_SET);
328 static int amf_parse_object(AVFormatContext *s, AVStream *astream, AVStream *vstream, const char *key, int64_t max_pos, int depth) {
329 AVCodecContext *acodec, *vcodec;
330 FLVContext *flv = s->priv_data;
332 AMFDataType amf_type;
339 amf_type = avio_r8(ioc);
342 case AMF_DATA_TYPE_NUMBER:
343 num_val = av_int2double(avio_rb64(ioc)); break;
344 case AMF_DATA_TYPE_BOOL:
345 num_val = avio_r8(ioc); break;
346 case AMF_DATA_TYPE_STRING:
347 if(amf_get_string(ioc, str_val, sizeof(str_val)) < 0)
350 case AMF_DATA_TYPE_OBJECT:
351 if ((vstream || astream) && ioc->seekable && key && !strcmp(KEYFRAMES_TAG, key) && depth == 1)
352 if (parse_keyframes_index(s, ioc, vstream ? vstream : astream,
354 av_log(s, AV_LOG_ERROR, "Keyframe index parsing failed\n");
356 while (avio_tell(ioc) < max_pos - 2 && amf_get_string(ioc, str_val, sizeof(str_val)) > 0) {
357 if (amf_parse_object(s, astream, vstream, str_val, max_pos, depth + 1) < 0)
358 return -1; //if we couldn't skip, bomb out.
360 if(avio_r8(ioc) != AMF_END_OF_OBJECT)
363 case AMF_DATA_TYPE_NULL:
364 case AMF_DATA_TYPE_UNDEFINED:
365 case AMF_DATA_TYPE_UNSUPPORTED:
366 break; //these take up no additional space
367 case AMF_DATA_TYPE_MIXEDARRAY:
368 avio_skip(ioc, 4); //skip 32-bit max array index
369 while(avio_tell(ioc) < max_pos - 2 && amf_get_string(ioc, str_val, sizeof(str_val)) > 0) {
370 //this is the only case in which we would want a nested parse to not skip over the object
371 if(amf_parse_object(s, astream, vstream, str_val, max_pos, depth + 1) < 0)
374 if(avio_r8(ioc) != AMF_END_OF_OBJECT)
377 case AMF_DATA_TYPE_ARRAY: {
378 unsigned int arraylen, i;
380 arraylen = avio_rb32(ioc);
381 for(i = 0; i < arraylen && avio_tell(ioc) < max_pos - 1; i++) {
382 if(amf_parse_object(s, NULL, NULL, NULL, max_pos, depth + 1) < 0)
383 return -1; //if we couldn't skip, bomb out.
387 case AMF_DATA_TYPE_DATE:
388 avio_skip(ioc, 8 + 2); //timestamp (double) and UTC offset (int16)
390 default: //unsupported type, we couldn't skip
394 if(depth == 1 && key) { //only look for metadata values when we are not nested and key != NULL
395 acodec = astream ? astream->codec : NULL;
396 vcodec = vstream ? vstream->codec : NULL;
398 if (amf_type == AMF_DATA_TYPE_NUMBER) {
399 if (!strcmp(key, "duration"))
400 s->duration = num_val * AV_TIME_BASE;
401 else if (!strcmp(key, "videodatarate") && vcodec && 0 <= (int)(num_val * 1024.0))
402 vcodec->bit_rate = num_val * 1024.0;
403 else if (!strcmp(key, "audiodatarate") && acodec && 0 <= (int)(num_val * 1024.0))
404 acodec->bit_rate = num_val * 1024.0;
405 else if (!strcmp(key, "datastream")) {
406 AVStream *st = create_stream(s, AVMEDIA_TYPE_DATA);
408 return AVERROR(ENOMEM);
409 st->codec->codec_id = AV_CODEC_ID_TEXT;
410 } else if (flv->trust_metadata) {
411 if (!strcmp(key, "videocodecid") && vcodec) {
412 flv_set_video_codec(s, vstream, num_val);
414 if (!strcmp(key, "audiocodecid") && acodec) {
415 flv_set_audio_codec(s, astream, acodec, num_val);
417 if (!strcmp(key, "audiosamplerate") && acodec) {
418 acodec->sample_rate = num_val;
420 if (!strcmp(key, "width") && vcodec) {
421 vcodec->width = num_val;
423 if (!strcmp(key, "height") && vcodec) {
424 vcodec->height = num_val;
429 if (amf_type == AMF_DATA_TYPE_OBJECT && s->nb_streams == 1 &&
430 ((!acodec && !strcmp(key, "audiocodecid")) ||
431 (!vcodec && !strcmp(key, "videocodecid"))))
432 s->ctx_flags &= ~AVFMTCTX_NOHEADER; //If there is either audio/video missing, codecid will be an empty object
434 if (!strcmp(key, "duration") ||
435 !strcmp(key, "filesize") ||
436 !strcmp(key, "width") ||
437 !strcmp(key, "height") ||
438 !strcmp(key, "videodatarate") ||
439 !strcmp(key, "framerate") ||
440 !strcmp(key, "videocodecid") ||
441 !strcmp(key, "audiodatarate") ||
442 !strcmp(key, "audiosamplerate") ||
443 !strcmp(key, "audiosamplesize") ||
444 !strcmp(key, "stereo") ||
445 !strcmp(key, "audiocodecid"))
448 if(amf_type == AMF_DATA_TYPE_BOOL) {
449 av_strlcpy(str_val, num_val > 0 ? "true" : "false", sizeof(str_val));
450 av_dict_set(&s->metadata, key, str_val, 0);
451 } else if(amf_type == AMF_DATA_TYPE_NUMBER) {
452 snprintf(str_val, sizeof(str_val), "%.f", num_val);
453 av_dict_set(&s->metadata, key, str_val, 0);
454 } else if (amf_type == AMF_DATA_TYPE_STRING)
455 av_dict_set(&s->metadata, key, str_val, 0);
461 static int flv_read_metabody(AVFormatContext *s, int64_t next_pos) {
463 AVStream *stream, *astream, *vstream, *dstream;
466 char buffer[11]; //only needs to hold the string "onMetaData". Anything longer is something we don't want.
468 vstream = astream = dstream = NULL;
471 //first object needs to be "onMetaData" string
473 if (type != AMF_DATA_TYPE_STRING ||
474 amf_get_string(ioc, buffer, sizeof(buffer)) < 0)
477 if (!strcmp(buffer, "onTextData"))
480 if (strcmp(buffer, "onMetaData"))
483 //find the streams now so that amf_parse_object doesn't need to do the lookup every time it is called.
484 for(i = 0; i < s->nb_streams; i++) {
485 stream = s->streams[i];
486 if(stream->codec->codec_type == AVMEDIA_TYPE_VIDEO) vstream = stream;
487 else if(stream->codec->codec_type == AVMEDIA_TYPE_AUDIO) astream = stream;
488 else if(stream->codec->codec_type == AVMEDIA_TYPE_DATA) dstream = stream;
491 //parse the second object (we want a mixed array)
492 if(amf_parse_object(s, astream, vstream, buffer, next_pos, 0) < 0)
498 static int flv_read_header(AVFormatContext *s)
503 flags = avio_r8(s->pb);
504 /* old flvtool cleared this field */
505 /* FIXME: better fix needed */
507 flags = FLV_HEADER_FLAG_HASVIDEO | FLV_HEADER_FLAG_HASAUDIO;
508 av_log(s, AV_LOG_WARNING, "Broken FLV file, which says no streams present, this might fail\n");
510 s->ctx_flags |= AVFMTCTX_NOHEADER;
512 if(flags & FLV_HEADER_FLAG_HASVIDEO){
513 if(!create_stream(s, AVMEDIA_TYPE_VIDEO))
514 return AVERROR(ENOMEM);
516 if(flags & FLV_HEADER_FLAG_HASAUDIO){
517 if(!create_stream(s, AVMEDIA_TYPE_AUDIO))
518 return AVERROR(ENOMEM);
520 // Flag doesn't indicate whether or not there is script-data present. Must
521 // create that stream if it's encountered.
523 offset = avio_rb32(s->pb);
524 avio_seek(s->pb, offset, SEEK_SET);
532 static int flv_read_close(AVFormatContext *s)
535 FLVContext *flv = s->priv_data;
536 for(i=0; i<FLV_STREAM_TYPE_NB; i++)
537 av_freep(&flv->new_extradata[i]);
541 static int flv_get_extradata(AVFormatContext *s, AVStream *st, int size)
543 av_free(st->codec->extradata);
544 st->codec->extradata = av_mallocz(size + FF_INPUT_BUFFER_PADDING_SIZE);
545 if (!st->codec->extradata)
546 return AVERROR(ENOMEM);
547 st->codec->extradata_size = size;
548 avio_read(s->pb, st->codec->extradata, st->codec->extradata_size);
552 static int flv_queue_extradata(FLVContext *flv, AVIOContext *pb, int stream,
555 av_free(flv->new_extradata[stream]);
556 flv->new_extradata[stream] = av_mallocz(size + FF_INPUT_BUFFER_PADDING_SIZE);
557 if (!flv->new_extradata[stream])
558 return AVERROR(ENOMEM);
559 flv->new_extradata_size[stream] = size;
560 avio_read(pb, flv->new_extradata[stream], size);
564 static void clear_index_entries(AVFormatContext *s, int64_t pos)
567 av_log(s, AV_LOG_WARNING, "Found invalid index entries, clearing the index.\n");
568 for (i = 0; i < s->nb_streams; i++) {
569 AVStream *st = s->streams[i];
570 /* Remove all index entries that point to >= pos */
572 for (j = 0; j < st->nb_index_entries; j++) {
573 if (st->index_entries[j].pos < pos)
574 st->index_entries[out++] = st->index_entries[j];
576 st->nb_index_entries = out;
581 static int flv_data_packet(AVFormatContext *s, AVPacket *pkt,
582 int64_t dts, int64_t next)
584 int ret = AVERROR_INVALIDDATA, i;
585 AVIOContext *pb = s->pb;
592 if (type == AMF_DATA_TYPE_MIXEDARRAY)
593 avio_seek(pb, 4, SEEK_CUR);
594 else if (type != AMF_DATA_TYPE_OBJECT)
597 amf_get_string(pb, buf, sizeof(buf));
598 if (strcmp(buf, "type") || avio_r8(pb) != AMF_DATA_TYPE_STRING)
601 amf_get_string(pb, buf, sizeof(buf));
602 //FIXME parse it as codec_id
603 amf_get_string(pb, buf, sizeof(buf));
604 if (strcmp(buf, "text") || avio_r8(pb) != AMF_DATA_TYPE_STRING)
607 length = avio_rb16(pb);
608 ret = av_get_packet(s->pb, pkt, length);
614 for (i = 0; i < s->nb_streams; i++) {
616 if (st->codec->codec_type == AVMEDIA_TYPE_DATA)
620 if (i == s->nb_streams) {
621 st = create_stream(s, AVMEDIA_TYPE_DATA);
624 st->codec->codec_id = AV_CODEC_ID_TEXT;
631 pkt->stream_index = st->index;
632 pkt->flags |= AV_PKT_FLAG_KEY;
634 avio_seek(s->pb, next + 4, SEEK_SET);
639 static int flv_read_packet(AVFormatContext *s, AVPacket *pkt)
641 FLVContext *flv = s->priv_data;
642 int ret, i, type, size, flags;
645 int64_t dts, pts = AV_NOPTS_VALUE;
646 int av_uninit(channels);
647 int av_uninit(sample_rate);
650 for(;;avio_skip(s->pb, 4)){ /* pkt size is repeated at end. skip it */
651 pos = avio_tell(s->pb);
652 type = avio_r8(s->pb);
653 size = avio_rb24(s->pb);
654 dts = avio_rb24(s->pb);
655 dts |= avio_r8(s->pb) << 24;
656 av_dlog(s, "type:%d, size:%d, dts:%"PRId64"\n", type, size, dts);
659 avio_skip(s->pb, 3); /* stream id, always 0 */
662 if (flv->validate_next < flv->validate_count) {
663 int64_t validate_pos = flv->validate_index[flv->validate_next].pos;
664 if (pos == validate_pos) {
665 if (FFABS(dts - flv->validate_index[flv->validate_next].dts) <=
666 VALIDATE_INDEX_TS_THRESH) {
667 flv->validate_next++;
669 clear_index_entries(s, validate_pos);
670 flv->validate_count = 0;
672 } else if (pos > validate_pos) {
673 clear_index_entries(s, validate_pos);
674 flv->validate_count = 0;
681 next= size + avio_tell(s->pb);
683 if (type == FLV_TAG_TYPE_AUDIO) {
684 stream_type=FLV_STREAM_TYPE_AUDIO;
685 flags = avio_r8(s->pb);
687 } else if (type == FLV_TAG_TYPE_VIDEO) {
688 stream_type=FLV_STREAM_TYPE_VIDEO;
689 flags = avio_r8(s->pb);
691 if ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_VIDEO_INFO_CMD)
693 } else if (type == FLV_TAG_TYPE_META) {
694 if (size > 13+1+4 && dts == 0) { // Header-type metadata stuff
695 flv_read_metabody(s, next);
697 } else if (dts != 0) { // Script-data "special" metadata frames - don't skip
698 stream_type=FLV_STREAM_TYPE_DATA;
703 av_log(s, AV_LOG_DEBUG, "skipping flv packet: type %d, size %d, flags %d\n", type, size, flags);
705 avio_seek(s->pb, next, SEEK_SET);
709 /* skip empty data packets */
713 /* now find stream */
714 for(i=0;i<s->nb_streams;i++) {
716 if (stream_type == FLV_STREAM_TYPE_AUDIO && st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
717 if (flv_same_audio_codec(st->codec, flags)) {
721 if (stream_type == FLV_STREAM_TYPE_VIDEO && st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
722 if (flv_same_video_codec(st->codec, flags)) {
725 } else if (st->id == stream_type) {
729 if(i == s->nb_streams){
730 av_log(s, AV_LOG_WARNING, "Stream discovered after head already parsed\n");
731 st = create_stream(s,
732 (int[]){AVMEDIA_TYPE_VIDEO, AVMEDIA_TYPE_AUDIO, AVMEDIA_TYPE_DATA}[stream_type]);
734 av_dlog(s, "%d %X %d \n", stream_type, flags, st->discard);
735 if( (st->discard >= AVDISCARD_NONKEY && !((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY || (stream_type == FLV_STREAM_TYPE_AUDIO)))
736 ||(st->discard >= AVDISCARD_BIDIR && ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_DISP_INTER && (stream_type == FLV_STREAM_TYPE_VIDEO)))
737 || st->discard >= AVDISCARD_ALL
739 avio_seek(s->pb, next, SEEK_SET);
742 if ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY)
743 av_add_index_entry(st, pos, dts, size, 0, AVINDEX_KEYFRAME);
747 // if not streamed and no duration from metadata then seek to end to find the duration from the timestamps
748 if(s->pb->seekable && (!s->duration || s->duration==AV_NOPTS_VALUE) && !flv->searched_for_end){
750 const int64_t pos= avio_tell(s->pb);
751 int64_t fsize= avio_size(s->pb);
753 avio_seek(s->pb, fsize-4, SEEK_SET);
754 size= avio_rb32(s->pb);
755 avio_seek(s->pb, fsize-3-size, SEEK_SET);
756 if(size == avio_rb24(s->pb) + 11){
757 uint32_t ts = avio_rb24(s->pb);
758 ts |= avio_r8(s->pb) << 24;
760 s->duration = ts * (int64_t)AV_TIME_BASE / 1000;
761 else if (fsize >= 8 && fsize - 8 >= size){
767 avio_seek(s->pb, pos, SEEK_SET);
768 flv->searched_for_end = 1;
771 if(stream_type == FLV_STREAM_TYPE_AUDIO){
772 int bits_per_coded_sample;
773 channels = (flags & FLV_AUDIO_CHANNEL_MASK) == FLV_STEREO ? 2 : 1;
774 sample_rate = (44100 << ((flags & FLV_AUDIO_SAMPLERATE_MASK) >> FLV_AUDIO_SAMPLERATE_OFFSET) >> 3);
775 bits_per_coded_sample = (flags & FLV_AUDIO_SAMPLESIZE_MASK) ? 16 : 8;
776 if(!st->codec->channels || !st->codec->sample_rate || !st->codec->bits_per_coded_sample) {
777 st->codec->channels = channels;
778 st->codec->sample_rate = sample_rate;
779 st->codec->bits_per_coded_sample = bits_per_coded_sample;
781 if(!st->codec->codec_id){
782 flv_set_audio_codec(s, st, st->codec, flags & FLV_AUDIO_CODECID_MASK);
783 flv->last_sample_rate = sample_rate = st->codec->sample_rate;
784 flv->last_channels = channels = st->codec->channels;
787 ctx.sample_rate = sample_rate;
788 flv_set_audio_codec(s, st, &ctx, flags & FLV_AUDIO_CODECID_MASK);
789 sample_rate = ctx.sample_rate;
791 } else if(stream_type == FLV_STREAM_TYPE_VIDEO) {
792 size -= flv_set_video_codec(s, st, flags & FLV_VIDEO_CODECID_MASK);
795 if (st->codec->codec_id == AV_CODEC_ID_AAC ||
796 st->codec->codec_id == AV_CODEC_ID_H264 ||
797 st->codec->codec_id == AV_CODEC_ID_MPEG4) {
798 int type = avio_r8(s->pb);
800 if (st->codec->codec_id == AV_CODEC_ID_H264 || st->codec->codec_id == AV_CODEC_ID_MPEG4) {
801 int32_t cts = (avio_rb24(s->pb)+0xff800000)^0xff800000; // sign extension
803 if (cts < 0) { // dts are wrong
805 av_log(s, AV_LOG_WARNING, "negative cts, previous timestamps might be wrong\n");
808 dts = AV_NOPTS_VALUE;
810 if (type == 0 && (!st->codec->extradata || st->codec->codec_id == AV_CODEC_ID_AAC)) {
811 if (st->codec->extradata) {
812 if ((ret = flv_queue_extradata(flv, s->pb, stream_type, size)) < 0)
814 ret = AVERROR(EAGAIN);
817 if ((ret = flv_get_extradata(s, st, size)) < 0)
819 if (st->codec->codec_id == AV_CODEC_ID_AAC) {
820 MPEG4AudioConfig cfg;
821 if (avpriv_mpeg4audio_get_config(&cfg, st->codec->extradata,
822 st->codec->extradata_size * 8, 1) >= 0) {
823 st->codec->channels = cfg.channels;
824 if (cfg.ext_sample_rate)
825 st->codec->sample_rate = cfg.ext_sample_rate;
827 st->codec->sample_rate = cfg.sample_rate;
828 av_dlog(s, "mp4a config channels %d sample rate %d\n",
829 st->codec->channels, st->codec->sample_rate);
833 ret = AVERROR(EAGAIN);
838 /* skip empty data packets */
840 ret = AVERROR(EAGAIN);
844 ret= av_get_packet(s->pb, pkt, size);
848 pkt->pts = pts == AV_NOPTS_VALUE ? dts : pts;
849 pkt->stream_index = st->index;
850 if (flv->new_extradata[stream_type]) {
851 uint8_t *side = av_packet_new_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA,
852 flv->new_extradata_size[stream_type]);
854 memcpy(side, flv->new_extradata[stream_type],
855 flv->new_extradata_size[stream_type]);
856 av_freep(&flv->new_extradata[stream_type]);
857 flv->new_extradata_size[stream_type] = 0;
860 if (stream_type == FLV_STREAM_TYPE_AUDIO && (sample_rate != flv->last_sample_rate ||
861 channels != flv->last_channels)) {
862 flv->last_sample_rate = sample_rate;
863 flv->last_channels = channels;
864 ff_add_param_change(pkt, channels, 0, sample_rate, 0, 0);
867 if ( stream_type == FLV_STREAM_TYPE_AUDIO ||
868 ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY) ||
869 stream_type == FLV_STREAM_TYPE_DATA)
870 pkt->flags |= AV_PKT_FLAG_KEY;
877 static int flv_read_seek(AVFormatContext *s, int stream_index,
878 int64_t ts, int flags)
880 FLVContext *flv = s->priv_data;
881 flv->validate_count = 0;
882 return avio_seek_time(s->pb, stream_index, ts, flags);
885 #define OFFSET(x) offsetof(FLVContext, x)
886 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
887 static const AVOption options[] = {
888 { "flv_metadata", "Allocate streams according the onMetaData array", OFFSET(trust_metadata), AV_OPT_TYPE_INT, { 0 }, 0, 1, VD},
892 static const AVClass class = {
893 .class_name = "flvdec",
894 .item_name = av_default_item_name,
896 .version = LIBAVUTIL_VERSION_INT,
899 AVInputFormat ff_flv_demuxer = {
901 .long_name = NULL_IF_CONFIG_SMALL("FLV (Flash Video)"),
902 .priv_data_size = sizeof(FLVContext),
903 .read_probe = flv_probe,
904 .read_header = flv_read_header,
905 .read_packet = flv_read_packet,
906 .read_seek = flv_read_seek,
907 .read_close = flv_read_close,
909 .priv_class = &class,