3 * Copyright (c) 2003 The Libav 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 Libav.
12 * Libav 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 * Libav 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 Libav; 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 KEYFRAMES_TAG "keyframes"
40 #define KEYFRAMES_TIMESTAMP_TAG "times"
41 #define KEYFRAMES_BYTEOFFSET_TAG "filepositions"
43 #define VALIDATE_INDEX_TS_THRESH 2500
46 const AVClass *class; ///< Class for private options.
47 int trust_metadata; ///< configure streams according onMetaData
48 int wrong_dts; ///< wrong dts due to negative cts
49 uint8_t *new_extradata[2];
50 int new_extradata_size[2];
61 static int flv_probe(AVProbeData *p)
66 if (d[0] == 'F' && d[1] == 'L' && d[2] == 'V' && d[3] < 5 && d[5]==0 && AV_RB32(d+5)>8) {
67 return AVPROBE_SCORE_MAX;
72 static AVStream *create_stream(AVFormatContext *s, int codec_type)
74 AVStream *st = avformat_new_stream(s, NULL);
77 st->codec->codec_type = codec_type;
78 avpriv_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
81 static int flv_same_audio_codec(AVCodecContext *acodec, int flags)
83 int bits_per_coded_sample = (flags & FLV_AUDIO_SAMPLESIZE_MASK) ? 16 : 8;
84 int flv_codecid = flags & FLV_AUDIO_CODECID_MASK;
87 if (!acodec->codec_id && !acodec->codec_tag)
90 if (acodec->bits_per_coded_sample != bits_per_coded_sample)
94 //no distinction between S16 and S8 PCM codec flags
96 codec_id = bits_per_coded_sample == 8 ? AV_CODEC_ID_PCM_U8 :
98 AV_CODEC_ID_PCM_S16BE;
100 AV_CODEC_ID_PCM_S16LE;
102 return codec_id == acodec->codec_id;
103 case FLV_CODECID_PCM_LE:
104 codec_id = bits_per_coded_sample == 8 ? AV_CODEC_ID_PCM_U8 : AV_CODEC_ID_PCM_S16LE;
105 return codec_id == acodec->codec_id;
106 case FLV_CODECID_AAC:
107 return acodec->codec_id == AV_CODEC_ID_AAC;
108 case FLV_CODECID_ADPCM:
109 return acodec->codec_id == AV_CODEC_ID_ADPCM_SWF;
110 case FLV_CODECID_SPEEX:
111 return acodec->codec_id == AV_CODEC_ID_SPEEX;
112 case FLV_CODECID_MP3:
113 return acodec->codec_id == AV_CODEC_ID_MP3;
114 case FLV_CODECID_NELLYMOSER_8KHZ_MONO:
115 case FLV_CODECID_NELLYMOSER_16KHZ_MONO:
116 case FLV_CODECID_NELLYMOSER:
117 return acodec->codec_id == AV_CODEC_ID_NELLYMOSER;
118 case FLV_CODECID_PCM_MULAW:
119 return acodec->sample_rate == 8000 &&
120 acodec->codec_id == AV_CODEC_ID_PCM_MULAW;
121 case FLV_CODECID_PCM_ALAW:
122 return acodec->sample_rate = 8000 &&
123 acodec->codec_id == AV_CODEC_ID_PCM_ALAW;
125 return acodec->codec_tag == (flv_codecid >> FLV_AUDIO_CODECID_OFFSET);
131 static void flv_set_audio_codec(AVFormatContext *s, AVStream *astream, AVCodecContext *acodec, int flv_codecid) {
132 switch(flv_codecid) {
133 //no distinction between S16 and S8 PCM codec flags
134 case FLV_CODECID_PCM:
135 acodec->codec_id = acodec->bits_per_coded_sample == 8 ? AV_CODEC_ID_PCM_U8 :
137 AV_CODEC_ID_PCM_S16BE;
139 AV_CODEC_ID_PCM_S16LE;
142 case FLV_CODECID_PCM_LE:
143 acodec->codec_id = acodec->bits_per_coded_sample == 8 ? AV_CODEC_ID_PCM_U8 : AV_CODEC_ID_PCM_S16LE; break;
144 case FLV_CODECID_AAC : acodec->codec_id = AV_CODEC_ID_AAC; break;
145 case FLV_CODECID_ADPCM: acodec->codec_id = AV_CODEC_ID_ADPCM_SWF; break;
146 case FLV_CODECID_SPEEX:
147 acodec->codec_id = AV_CODEC_ID_SPEEX;
148 acodec->sample_rate = 16000;
150 case FLV_CODECID_MP3 : acodec->codec_id = AV_CODEC_ID_MP3 ; astream->need_parsing = AVSTREAM_PARSE_FULL; break;
151 case FLV_CODECID_NELLYMOSER_8KHZ_MONO:
152 acodec->sample_rate = 8000; //in case metadata does not otherwise declare samplerate
153 acodec->codec_id = AV_CODEC_ID_NELLYMOSER;
155 case FLV_CODECID_NELLYMOSER_16KHZ_MONO:
156 acodec->sample_rate = 16000;
157 acodec->codec_id = AV_CODEC_ID_NELLYMOSER;
159 case FLV_CODECID_NELLYMOSER:
160 acodec->codec_id = AV_CODEC_ID_NELLYMOSER;
162 case FLV_CODECID_PCM_MULAW:
163 acodec->sample_rate = 8000;
164 acodec->codec_id = AV_CODEC_ID_PCM_MULAW;
166 case FLV_CODECID_PCM_ALAW:
167 acodec->sample_rate = 8000;
168 acodec->codec_id = AV_CODEC_ID_PCM_ALAW;
171 av_log(s, AV_LOG_INFO, "Unsupported audio codec (%x)\n", flv_codecid >> FLV_AUDIO_CODECID_OFFSET);
172 acodec->codec_tag = flv_codecid >> FLV_AUDIO_CODECID_OFFSET;
176 static int flv_same_video_codec(AVCodecContext *vcodec, int flags)
178 int flv_codecid = flags & FLV_VIDEO_CODECID_MASK;
180 if (!vcodec->codec_id && !vcodec->codec_tag)
183 switch (flv_codecid) {
184 case FLV_CODECID_H263:
185 return vcodec->codec_id == AV_CODEC_ID_FLV1;
186 case FLV_CODECID_SCREEN:
187 return vcodec->codec_id == AV_CODEC_ID_FLASHSV;
188 case FLV_CODECID_SCREEN2:
189 return vcodec->codec_id == AV_CODEC_ID_FLASHSV2;
190 case FLV_CODECID_VP6:
191 return vcodec->codec_id == AV_CODEC_ID_VP6F;
192 case FLV_CODECID_VP6A:
193 return vcodec->codec_id == AV_CODEC_ID_VP6A;
194 case FLV_CODECID_H264:
195 return vcodec->codec_id == AV_CODEC_ID_H264;
197 return vcodec->codec_tag == flv_codecid;
203 static int flv_set_video_codec(AVFormatContext *s, AVStream *vstream, int flv_codecid) {
204 AVCodecContext *vcodec = vstream->codec;
205 switch(flv_codecid) {
206 case FLV_CODECID_H263 : vcodec->codec_id = AV_CODEC_ID_FLV1 ; break;
207 case FLV_CODECID_SCREEN: vcodec->codec_id = AV_CODEC_ID_FLASHSV; break;
208 case FLV_CODECID_SCREEN2: vcodec->codec_id = AV_CODEC_ID_FLASHSV2; break;
209 case FLV_CODECID_VP6 : vcodec->codec_id = AV_CODEC_ID_VP6F ;
210 case FLV_CODECID_VP6A :
211 if(flv_codecid == FLV_CODECID_VP6A)
212 vcodec->codec_id = AV_CODEC_ID_VP6A;
213 if(vcodec->extradata_size != 1) {
214 vcodec->extradata_size = 1;
215 vcodec->extradata = av_malloc(1);
217 vcodec->extradata[0] = avio_r8(s->pb);
218 return 1; // 1 byte body size adjustment for flv_read_packet()
219 case FLV_CODECID_H264:
220 vcodec->codec_id = AV_CODEC_ID_H264;
221 return 3; // not 4, reading packet type will consume one byte
223 av_log(s, AV_LOG_INFO, "Unsupported video codec (%x)\n", flv_codecid);
224 vcodec->codec_tag = flv_codecid;
230 static int amf_get_string(AVIOContext *ioc, char *buffer, int buffsize) {
231 int length = avio_rb16(ioc);
232 if(length >= buffsize) {
233 avio_skip(ioc, length);
237 avio_read(ioc, buffer, length);
239 buffer[length] = '\0';
244 static int parse_keyframes_index(AVFormatContext *s, AVIOContext *ioc, AVStream *vstream, int64_t max_pos) {
245 FLVContext *flv = s->priv_data;
246 unsigned int arraylen = 0, timeslen = 0, fileposlen = 0, i;
249 int64_t *times = NULL;
250 int64_t *filepositions = NULL;
251 int ret = AVERROR(ENOSYS);
252 int64_t initial_pos = avio_tell(ioc);
254 if (s->flags & AVFMT_FLAG_IGNIDX)
257 while (avio_tell(ioc) < max_pos - 2 && amf_get_string(ioc, str_val, sizeof(str_val)) > 0) {
258 int64_t* current_array;
260 // Expect array object in context
261 if (avio_r8(ioc) != AMF_DATA_TYPE_ARRAY)
264 arraylen = avio_rb32(ioc);
269 * Expect only 'times' or 'filepositions' sub-arrays in other case refuse to use such metadata
272 if (!strcmp(KEYFRAMES_TIMESTAMP_TAG, str_val) && !times) {
273 if (!(times = av_mallocz(sizeof(*times) * arraylen))) {
274 ret = AVERROR(ENOMEM);
278 current_array = times;
279 } else if (!strcmp(KEYFRAMES_BYTEOFFSET_TAG, str_val) && !filepositions) {
280 if (!(filepositions = av_mallocz(sizeof(*filepositions) * arraylen))) {
281 ret = AVERROR(ENOMEM);
284 fileposlen = arraylen;
285 current_array = filepositions;
286 } else // unexpected metatag inside keyframes, will not use such metadata for indexing
289 for (i = 0; i < arraylen && avio_tell(ioc) < max_pos - 1; i++) {
290 if (avio_r8(ioc) != AMF_DATA_TYPE_NUMBER)
292 num_val = av_int2double(avio_rb64(ioc));
293 current_array[i] = num_val;
295 if (times && filepositions) {
296 // All done, exiting at a position allowing amf_parse_object
297 // to finish parsing the object
303 if (!ret && timeslen == fileposlen) {
304 for (i = 0; i < fileposlen; i++) {
305 av_add_index_entry(vstream, filepositions[i], times[i]*1000,
306 0, 0, AVINDEX_KEYFRAME);
308 flv->validate_index[i].pos = filepositions[i];
309 flv->validate_index[i].dts = times[i] * 1000;
310 flv->validate_count = i + 1;
314 av_log(s, AV_LOG_WARNING, "Invalid keyframes object, skipping.\n");
318 av_freep(&filepositions);
319 // If we got unexpected data, but successfully reset back to
320 // the start pos, the caller can continue parsing
321 if (ret < 0 && avio_seek(ioc, initial_pos, SEEK_SET) > 0)
326 static int amf_parse_object(AVFormatContext *s, AVStream *astream, AVStream *vstream, const char *key, int64_t max_pos, int depth) {
327 AVCodecContext *acodec, *vcodec;
328 FLVContext *flv = s->priv_data;
330 AMFDataType amf_type;
337 amf_type = avio_r8(ioc);
340 case AMF_DATA_TYPE_NUMBER:
341 num_val = av_int2double(avio_rb64(ioc)); break;
342 case AMF_DATA_TYPE_BOOL:
343 num_val = avio_r8(ioc); break;
344 case AMF_DATA_TYPE_STRING:
345 if(amf_get_string(ioc, str_val, sizeof(str_val)) < 0)
348 case AMF_DATA_TYPE_OBJECT:
349 if ((vstream || astream) && key && !strcmp(KEYFRAMES_TAG, key) && depth == 1)
350 if (parse_keyframes_index(s, ioc, vstream ? vstream : astream,
354 while (avio_tell(ioc) < max_pos - 2 && amf_get_string(ioc, str_val, sizeof(str_val)) > 0) {
355 if (amf_parse_object(s, astream, vstream, str_val, max_pos, depth + 1) < 0)
356 return -1; //if we couldn't skip, bomb out.
358 if(avio_r8(ioc) != AMF_END_OF_OBJECT)
361 case AMF_DATA_TYPE_NULL:
362 case AMF_DATA_TYPE_UNDEFINED:
363 case AMF_DATA_TYPE_UNSUPPORTED:
364 break; //these take up no additional space
365 case AMF_DATA_TYPE_MIXEDARRAY:
366 avio_skip(ioc, 4); //skip 32-bit max array index
367 while(avio_tell(ioc) < max_pos - 2 && amf_get_string(ioc, str_val, sizeof(str_val)) > 0) {
368 //this is the only case in which we would want a nested parse to not skip over the object
369 if(amf_parse_object(s, astream, vstream, str_val, max_pos, depth + 1) < 0)
372 if(avio_r8(ioc) != AMF_END_OF_OBJECT)
375 case AMF_DATA_TYPE_ARRAY: {
376 unsigned int arraylen, i;
378 arraylen = avio_rb32(ioc);
379 for(i = 0; i < arraylen && avio_tell(ioc) < max_pos - 1; i++) {
380 if(amf_parse_object(s, NULL, NULL, NULL, max_pos, depth + 1) < 0)
381 return -1; //if we couldn't skip, bomb out.
385 case AMF_DATA_TYPE_DATE:
386 avio_skip(ioc, 8 + 2); //timestamp (double) and UTC offset (int16)
388 default: //unsupported type, we couldn't skip
392 if(depth == 1 && key) { //only look for metadata values when we are not nested and key != NULL
393 acodec = astream ? astream->codec : NULL;
394 vcodec = vstream ? vstream->codec : NULL;
396 if (amf_type == AMF_DATA_TYPE_NUMBER) {
397 if (!strcmp(key, "duration"))
398 s->duration = num_val * AV_TIME_BASE;
399 else if (!strcmp(key, "videodatarate") && vcodec && 0 <= (int)(num_val * 1024.0))
400 vcodec->bit_rate = num_val * 1024.0;
401 else if (!strcmp(key, "audiodatarate") && acodec && 0 <= (int)(num_val * 1024.0))
402 acodec->bit_rate = num_val * 1024.0;
403 else if (!strcmp(key, "datastream")) {
404 AVStream *st = create_stream(s, AVMEDIA_TYPE_DATA);
406 return AVERROR(ENOMEM);
407 st->codec->codec_id = AV_CODEC_ID_TEXT;
408 } else if (flv->trust_metadata) {
409 if (!strcmp(key, "videocodecid") && vcodec) {
410 flv_set_video_codec(s, vstream, num_val);
412 if (!strcmp(key, "audiocodecid") && acodec) {
413 flv_set_audio_codec(s, astream, acodec, num_val);
415 if (!strcmp(key, "audiosamplerate") && acodec) {
416 acodec->sample_rate = num_val;
418 if (!strcmp(key, "width") && vcodec) {
419 vcodec->width = num_val;
421 if (!strcmp(key, "height") && vcodec) {
422 vcodec->height = num_val;
427 if (!strcmp(key, "duration") ||
428 !strcmp(key, "filesize") ||
429 !strcmp(key, "width") ||
430 !strcmp(key, "height") ||
431 !strcmp(key, "videodatarate") ||
432 !strcmp(key, "framerate") ||
433 !strcmp(key, "videocodecid") ||
434 !strcmp(key, "audiodatarate") ||
435 !strcmp(key, "audiosamplerate") ||
436 !strcmp(key, "audiosamplesize") ||
437 !strcmp(key, "stereo") ||
438 !strcmp(key, "audiocodecid"))
441 if(amf_type == AMF_DATA_TYPE_BOOL) {
442 av_strlcpy(str_val, num_val > 0 ? "true" : "false", sizeof(str_val));
443 av_dict_set(&s->metadata, key, str_val, 0);
444 } else if(amf_type == AMF_DATA_TYPE_NUMBER) {
445 snprintf(str_val, sizeof(str_val), "%.f", num_val);
446 av_dict_set(&s->metadata, key, str_val, 0);
447 } else if (amf_type == AMF_DATA_TYPE_STRING)
448 av_dict_set(&s->metadata, key, str_val, 0);
454 static int flv_read_metabody(AVFormatContext *s, int64_t next_pos) {
456 AVStream *stream, *astream, *vstream;
459 char buffer[11]; //only needs to hold the string "onMetaData". Anything longer is something we don't want.
465 //first object needs to be "onMetaData" string
467 if (type != AMF_DATA_TYPE_STRING ||
468 amf_get_string(ioc, buffer, sizeof(buffer)) < 0)
471 if (!strcmp(buffer, "onTextData"))
474 if (strcmp(buffer, "onMetaData"))
477 //find the streams now so that amf_parse_object doesn't need to do the lookup every time it is called.
478 for(i = 0; i < s->nb_streams; i++) {
479 stream = s->streams[i];
480 if (stream->codec->codec_type == AVMEDIA_TYPE_AUDIO) astream = stream;
481 else if(stream->codec->codec_type == AVMEDIA_TYPE_VIDEO) vstream = stream;
484 //parse the second object (we want a mixed array)
485 if(amf_parse_object(s, astream, vstream, buffer, next_pos, 0) < 0)
491 static int flv_read_header(AVFormatContext *s)
496 flags = avio_r8(s->pb);
497 /* old flvtool cleared this field */
498 /* FIXME: better fix needed */
500 flags = FLV_HEADER_FLAG_HASVIDEO | FLV_HEADER_FLAG_HASAUDIO;
501 av_log(s, AV_LOG_WARNING, "Broken FLV file, which says no streams present, this might fail\n");
504 s->ctx_flags |= AVFMTCTX_NOHEADER;
506 if(flags & FLV_HEADER_FLAG_HASVIDEO){
507 if(!create_stream(s, AVMEDIA_TYPE_VIDEO))
508 return AVERROR(ENOMEM);
510 if(flags & FLV_HEADER_FLAG_HASAUDIO){
511 if(!create_stream(s, AVMEDIA_TYPE_AUDIO))
512 return AVERROR(ENOMEM);
515 offset = avio_rb32(s->pb);
516 avio_seek(s->pb, offset, SEEK_SET);
524 static int flv_read_close(AVFormatContext *s)
526 FLVContext *flv = s->priv_data;
527 av_freep(&flv->new_extradata[0]);
528 av_freep(&flv->new_extradata[1]);
532 static int flv_get_extradata(AVFormatContext *s, AVStream *st, int size)
534 av_free(st->codec->extradata);
535 st->codec->extradata = av_mallocz(size + FF_INPUT_BUFFER_PADDING_SIZE);
536 if (!st->codec->extradata)
537 return AVERROR(ENOMEM);
538 st->codec->extradata_size = size;
539 avio_read(s->pb, st->codec->extradata, st->codec->extradata_size);
543 static int flv_queue_extradata(FLVContext *flv, AVIOContext *pb, int stream,
546 av_free(flv->new_extradata[stream]);
547 flv->new_extradata[stream] = av_mallocz(size + FF_INPUT_BUFFER_PADDING_SIZE);
548 if (!flv->new_extradata[stream])
549 return AVERROR(ENOMEM);
550 flv->new_extradata_size[stream] = size;
551 avio_read(pb, flv->new_extradata[stream], size);
555 static void clear_index_entries(AVFormatContext *s, int64_t pos)
558 av_log(s, AV_LOG_WARNING, "Found invalid index entries, clearing the index.\n");
559 for (i = 0; i < s->nb_streams; i++) {
560 AVStream *st = s->streams[i];
561 /* Remove all index entries that point to >= pos */
563 for (j = 0; j < st->nb_index_entries; j++) {
564 if (st->index_entries[j].pos < pos)
565 st->index_entries[out++] = st->index_entries[j];
567 st->nb_index_entries = out;
572 static int flv_data_packet(AVFormatContext *s, AVPacket *pkt,
573 int64_t dts, int64_t next)
575 int ret = AVERROR_INVALIDDATA, i;
576 AVIOContext *pb = s->pb;
583 if (type == AMF_DATA_TYPE_MIXEDARRAY)
584 avio_seek(pb, 4, SEEK_CUR);
585 else if (type != AMF_DATA_TYPE_OBJECT)
588 amf_get_string(pb, buf, sizeof(buf));
589 if (strcmp(buf, "type") || avio_r8(pb) != AMF_DATA_TYPE_STRING)
592 amf_get_string(pb, buf, sizeof(buf));
593 //FIXME parse it as codec_id
594 amf_get_string(pb, buf, sizeof(buf));
595 if (strcmp(buf, "text") || avio_r8(pb) != AMF_DATA_TYPE_STRING)
598 length = avio_rb16(pb);
599 ret = av_get_packet(s->pb, pkt, length);
605 for (i = 0; i < s->nb_streams; i++) {
607 if (st->codec->codec_type == AVMEDIA_TYPE_DATA)
611 if (i == s->nb_streams) {
612 st = create_stream(s, AVMEDIA_TYPE_DATA);
615 st->codec->codec_id = AV_CODEC_ID_TEXT;
622 pkt->stream_index = st->index;
623 pkt->flags |= AV_PKT_FLAG_KEY;
625 avio_seek(s->pb, next + 4, SEEK_SET);
630 static int flv_read_packet(AVFormatContext *s, AVPacket *pkt)
632 FLVContext *flv = s->priv_data;
633 int ret, i, type, size, flags, is_audio;
635 int64_t dts, pts = AV_NOPTS_VALUE;
636 int sample_rate = 0, channels = 0;
639 for(;;avio_skip(s->pb, 4)){ /* pkt size is repeated at end. skip it */
640 pos = avio_tell(s->pb);
641 type = avio_r8(s->pb);
642 size = avio_rb24(s->pb);
643 dts = avio_rb24(s->pb);
644 dts |= avio_r8(s->pb) << 24;
645 av_dlog(s, "type:%d, size:%d, dts:%"PRId64"\n", type, size, dts);
646 if (s->pb->eof_reached)
648 avio_skip(s->pb, 3); /* stream id, always 0 */
651 if (flv->validate_next < flv->validate_count) {
652 int64_t validate_pos = flv->validate_index[flv->validate_next].pos;
653 if (pos == validate_pos) {
654 if (FFABS(dts - flv->validate_index[flv->validate_next].dts) <=
655 VALIDATE_INDEX_TS_THRESH) {
656 flv->validate_next++;
658 clear_index_entries(s, validate_pos);
659 flv->validate_count = 0;
661 } else if (pos > validate_pos) {
662 clear_index_entries(s, validate_pos);
663 flv->validate_count = 0;
670 next= size + avio_tell(s->pb);
672 if (type == FLV_TAG_TYPE_AUDIO) {
674 flags = avio_r8(s->pb);
676 } else if (type == FLV_TAG_TYPE_VIDEO) {
678 flags = avio_r8(s->pb);
680 if ((flags & 0xf0) == 0x50) /* video info / command frame */
683 if (type == FLV_TAG_TYPE_META && size > 13+1+4)
684 if (flv_read_metabody(s, next) > 0) {
685 return flv_data_packet(s, pkt, dts, next);
687 else /* skip packet */
688 av_log(s, AV_LOG_DEBUG, "skipping flv packet: type %d, size %d, flags %d\n", type, size, flags);
690 avio_seek(s->pb, next, SEEK_SET);
694 /* skip empty data packets */
698 /* now find stream */
699 for(i=0;i<s->nb_streams;i++) {
701 if (is_audio && st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
702 if (flv_same_audio_codec(st->codec, flags)) {
706 if (!is_audio && st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
707 if (flv_same_video_codec(st->codec, flags)) {
712 if(i == s->nb_streams){
713 st = create_stream(s,
714 is_audio ? AVMEDIA_TYPE_AUDIO : AVMEDIA_TYPE_VIDEO);
716 av_dlog(s, "%d %X %d \n", is_audio, flags, st->discard);
717 if( (st->discard >= AVDISCARD_NONKEY && !((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY || is_audio))
718 ||(st->discard >= AVDISCARD_BIDIR && ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_DISP_INTER && !is_audio))
719 || st->discard >= AVDISCARD_ALL
721 avio_seek(s->pb, next, SEEK_SET);
724 if ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY)
725 av_add_index_entry(st, pos, dts, size, 0, AVINDEX_KEYFRAME);
729 // if not streamed and no duration from metadata then seek to end to find the duration from the timestamps
730 if(s->pb->seekable && (!s->duration || s->duration==AV_NOPTS_VALUE)){
732 const int64_t pos= avio_tell(s->pb);
733 const int64_t fsize= avio_size(s->pb);
734 avio_seek(s->pb, fsize-4, SEEK_SET);
735 size= avio_rb32(s->pb);
736 avio_seek(s->pb, fsize-3-size, SEEK_SET);
737 if(size == avio_rb24(s->pb) + 11){
738 uint32_t ts = avio_rb24(s->pb);
739 ts |= avio_r8(s->pb) << 24;
740 s->duration = ts * (int64_t)AV_TIME_BASE / 1000;
742 avio_seek(s->pb, pos, SEEK_SET);
746 int bits_per_coded_sample;
747 channels = (flags & FLV_AUDIO_CHANNEL_MASK) == FLV_STEREO ? 2 : 1;
748 sample_rate = (44100 << ((flags & FLV_AUDIO_SAMPLERATE_MASK) >> FLV_AUDIO_SAMPLERATE_OFFSET) >> 3);
749 bits_per_coded_sample = (flags & FLV_AUDIO_SAMPLESIZE_MASK) ? 16 : 8;
750 if(!st->codec->channels || !st->codec->sample_rate || !st->codec->bits_per_coded_sample) {
751 st->codec->channels = channels;
752 st->codec->sample_rate = sample_rate;
753 st->codec->bits_per_coded_sample = bits_per_coded_sample;
755 if(!st->codec->codec_id){
756 flv_set_audio_codec(s, st, st->codec, flags & FLV_AUDIO_CODECID_MASK);
757 flv->last_sample_rate = sample_rate = st->codec->sample_rate;
758 flv->last_channels = channels = st->codec->channels;
761 ctx.sample_rate = sample_rate;
762 flv_set_audio_codec(s, st, &ctx, flags & FLV_AUDIO_CODECID_MASK);
763 sample_rate = ctx.sample_rate;
766 size -= flv_set_video_codec(s, st, flags & FLV_VIDEO_CODECID_MASK);
769 if (st->codec->codec_id == AV_CODEC_ID_AAC ||
770 st->codec->codec_id == AV_CODEC_ID_H264) {
771 int type = avio_r8(s->pb);
773 if (st->codec->codec_id == AV_CODEC_ID_H264) {
774 int32_t cts = (avio_rb24(s->pb)+0xff800000)^0xff800000; // sign extension
776 if (cts < 0) { // dts are wrong
778 av_log(s, AV_LOG_WARNING, "negative cts, previous timestamps might be wrong\n");
781 dts = AV_NOPTS_VALUE;
784 if (st->codec->extradata) {
785 if ((ret = flv_queue_extradata(flv, s->pb, is_audio, size)) < 0)
787 ret = AVERROR(EAGAIN);
790 if ((ret = flv_get_extradata(s, st, size)) < 0)
792 if (st->codec->codec_id == AV_CODEC_ID_AAC) {
793 MPEG4AudioConfig cfg;
794 avpriv_mpeg4audio_get_config(&cfg, st->codec->extradata,
795 st->codec->extradata_size * 8, 1);
796 st->codec->channels = cfg.channels;
797 if (cfg.ext_sample_rate)
798 st->codec->sample_rate = cfg.ext_sample_rate;
800 st->codec->sample_rate = cfg.sample_rate;
801 av_dlog(s, "mp4a config channels %d sample rate %d\n",
802 st->codec->channels, st->codec->sample_rate);
805 ret = AVERROR(EAGAIN);
810 /* skip empty data packets */
812 ret = AVERROR(EAGAIN);
816 ret= av_get_packet(s->pb, pkt, size);
820 /* note: we need to modify the packet size here to handle the last
824 pkt->pts = pts == AV_NOPTS_VALUE ? dts : pts;
825 pkt->stream_index = st->index;
826 if (flv->new_extradata[is_audio]) {
827 uint8_t *side = av_packet_new_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA,
828 flv->new_extradata_size[is_audio]);
830 memcpy(side, flv->new_extradata[is_audio],
831 flv->new_extradata_size[is_audio]);
832 av_freep(&flv->new_extradata[is_audio]);
833 flv->new_extradata_size[is_audio] = 0;
836 if (is_audio && (sample_rate != flv->last_sample_rate ||
837 channels != flv->last_channels)) {
838 flv->last_sample_rate = sample_rate;
839 flv->last_channels = channels;
840 ff_add_param_change(pkt, channels, 0, sample_rate, 0, 0);
843 if (is_audio || ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY))
844 pkt->flags |= AV_PKT_FLAG_KEY;
851 static int flv_read_seek(AVFormatContext *s, int stream_index,
852 int64_t ts, int flags)
854 FLVContext *flv = s->priv_data;
855 flv->validate_count = 0;
856 return avio_seek_time(s->pb, stream_index, ts, flags);
859 #define OFFSET(x) offsetof(FLVContext, x)
860 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
861 static const AVOption options[] = {
862 { "flv_metadata", "Allocate streams according the onMetaData array", OFFSET(trust_metadata), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VD},
866 static const AVClass class = {
867 .class_name = "flvdec",
868 .item_name = av_default_item_name,
870 .version = LIBAVUTIL_VERSION_INT,
873 AVInputFormat ff_flv_demuxer = {
875 .long_name = NULL_IF_CONFIG_SMALL("FLV (Flash Video)"),
876 .priv_data_size = sizeof(FLVContext),
877 .read_probe = flv_probe,
878 .read_header = flv_read_header,
879 .read_packet = flv_read_packet,
880 .read_seek = flv_read_seek,
881 .read_close = flv_read_close,
883 .priv_class = &class,