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/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
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];
59 static int flv_probe(AVProbeData *p)
64 if (d[0] == 'F' && d[1] == 'L' && d[2] == 'V' && d[3] < 5 && d[5]==0 && AV_RB32(d+5)>8) {
65 return AVPROBE_SCORE_MAX;
70 static AVStream *create_stream(AVFormatContext *s, int codec_type)
72 AVStream *st = avformat_new_stream(s, NULL);
75 st->codec->codec_type = codec_type;
76 if(s->nb_streams>=3 ||( s->nb_streams==2
77 && s->streams[0]->codec->codec_type != AVMEDIA_TYPE_DATA
78 && s->streams[1]->codec->codec_type != AVMEDIA_TYPE_DATA))
79 s->ctx_flags &= ~AVFMTCTX_NOHEADER;
81 avpriv_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
84 static int flv_same_audio_codec(AVCodecContext *acodec, int flags)
86 int bits_per_coded_sample = (flags & FLV_AUDIO_SAMPLESIZE_MASK) ? 16 : 8;
87 int flv_codecid = flags & FLV_AUDIO_CODECID_MASK;
90 if (!acodec->codec_id && !acodec->codec_tag)
93 if (acodec->bits_per_coded_sample != bits_per_coded_sample)
97 //no distinction between S16 and S8 PCM codec flags
99 codec_id = bits_per_coded_sample == 8 ? AV_CODEC_ID_PCM_U8 :
101 AV_CODEC_ID_PCM_S16BE;
103 AV_CODEC_ID_PCM_S16LE;
105 return codec_id == acodec->codec_id;
106 case FLV_CODECID_PCM_LE:
107 codec_id = bits_per_coded_sample == 8 ? AV_CODEC_ID_PCM_U8 : AV_CODEC_ID_PCM_S16LE;
108 return codec_id == acodec->codec_id;
109 case FLV_CODECID_AAC:
110 return acodec->codec_id == AV_CODEC_ID_AAC;
111 case FLV_CODECID_ADPCM:
112 return acodec->codec_id == AV_CODEC_ID_ADPCM_SWF;
113 case FLV_CODECID_SPEEX:
114 return acodec->codec_id == AV_CODEC_ID_SPEEX;
115 case FLV_CODECID_MP3:
116 return acodec->codec_id == AV_CODEC_ID_MP3;
117 case FLV_CODECID_NELLYMOSER_8KHZ_MONO:
118 case FLV_CODECID_NELLYMOSER_16KHZ_MONO:
119 case FLV_CODECID_NELLYMOSER:
120 return acodec->codec_id == AV_CODEC_ID_NELLYMOSER;
121 case FLV_CODECID_PCM_MULAW:
122 return acodec->sample_rate == 8000 &&
123 acodec->codec_id == AV_CODEC_ID_PCM_MULAW;
124 case FLV_CODECID_PCM_ALAW:
125 return acodec->sample_rate = 8000 &&
126 acodec->codec_id == AV_CODEC_ID_PCM_ALAW;
128 return acodec->codec_tag == (flv_codecid >> FLV_AUDIO_CODECID_OFFSET);
132 static void flv_set_audio_codec(AVFormatContext *s, AVStream *astream, AVCodecContext *acodec, int flv_codecid) {
133 switch(flv_codecid) {
134 //no distinction between S16 and S8 PCM codec flags
135 case FLV_CODECID_PCM:
136 acodec->codec_id = acodec->bits_per_coded_sample == 8 ? AV_CODEC_ID_PCM_U8 :
138 AV_CODEC_ID_PCM_S16BE;
140 AV_CODEC_ID_PCM_S16LE;
143 case FLV_CODECID_PCM_LE:
144 acodec->codec_id = acodec->bits_per_coded_sample == 8 ? AV_CODEC_ID_PCM_U8 : AV_CODEC_ID_PCM_S16LE; break;
145 case FLV_CODECID_AAC : acodec->codec_id = AV_CODEC_ID_AAC; break;
146 case FLV_CODECID_ADPCM: acodec->codec_id = AV_CODEC_ID_ADPCM_SWF; break;
147 case FLV_CODECID_SPEEX:
148 acodec->codec_id = AV_CODEC_ID_SPEEX;
149 acodec->sample_rate = 16000;
151 case FLV_CODECID_MP3 : acodec->codec_id = AV_CODEC_ID_MP3 ; astream->need_parsing = AVSTREAM_PARSE_FULL; break;
152 case FLV_CODECID_NELLYMOSER_8KHZ_MONO:
153 acodec->sample_rate = 8000; //in case metadata does not otherwise declare samplerate
154 acodec->codec_id = AV_CODEC_ID_NELLYMOSER;
156 case FLV_CODECID_NELLYMOSER_16KHZ_MONO:
157 acodec->sample_rate = 16000;
158 acodec->codec_id = AV_CODEC_ID_NELLYMOSER;
160 case FLV_CODECID_NELLYMOSER:
161 acodec->codec_id = AV_CODEC_ID_NELLYMOSER;
163 case FLV_CODECID_PCM_MULAW:
164 acodec->sample_rate = 8000;
165 acodec->codec_id = AV_CODEC_ID_PCM_MULAW;
167 case FLV_CODECID_PCM_ALAW:
168 acodec->sample_rate = 8000;
169 acodec->codec_id = AV_CODEC_ID_PCM_ALAW;
172 av_log(s, AV_LOG_INFO, "Unsupported audio codec (%x)\n", flv_codecid >> FLV_AUDIO_CODECID_OFFSET);
173 acodec->codec_tag = flv_codecid >> FLV_AUDIO_CODECID_OFFSET;
177 static int flv_same_video_codec(AVCodecContext *vcodec, int flags)
179 int flv_codecid = flags & FLV_VIDEO_CODECID_MASK;
181 if (!vcodec->codec_id && !vcodec->codec_tag)
184 switch (flv_codecid) {
185 case FLV_CODECID_H263:
186 return vcodec->codec_id == AV_CODEC_ID_FLV1;
187 case FLV_CODECID_SCREEN:
188 return vcodec->codec_id == AV_CODEC_ID_FLASHSV;
189 case FLV_CODECID_SCREEN2:
190 return vcodec->codec_id == AV_CODEC_ID_FLASHSV2;
191 case FLV_CODECID_VP6:
192 return vcodec->codec_id == AV_CODEC_ID_VP6F;
193 case FLV_CODECID_VP6A:
194 return vcodec->codec_id == AV_CODEC_ID_VP6A;
195 case FLV_CODECID_H264:
196 return vcodec->codec_id == AV_CODEC_ID_H264;
198 return vcodec->codec_tag == flv_codecid;
202 static int flv_set_video_codec(AVFormatContext *s, AVStream *vstream, int flv_codecid) {
203 AVCodecContext *vcodec = vstream->codec;
204 switch(flv_codecid) {
205 case FLV_CODECID_H263 : vcodec->codec_id = AV_CODEC_ID_FLV1 ; break;
206 case FLV_CODECID_REALH263: vcodec->codec_id = AV_CODEC_ID_H263 ; break; // Really mean it this time
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 + FF_INPUT_BUFFER_PADDING_SIZE);
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
222 case FLV_CODECID_MPEG4:
223 vcodec->codec_id = AV_CODEC_ID_MPEG4;
226 av_log(s, AV_LOG_INFO, "Unsupported video codec (%x)\n", flv_codecid);
227 vcodec->codec_tag = flv_codecid;
233 static int amf_get_string(AVIOContext *ioc, char *buffer, int buffsize) {
234 int length = avio_rb16(ioc);
235 if(length >= buffsize) {
236 avio_skip(ioc, length);
240 avio_read(ioc, buffer, length);
242 buffer[length] = '\0';
247 static int parse_keyframes_index(AVFormatContext *s, AVIOContext *ioc, AVStream *vstream, int64_t max_pos) {
248 FLVContext *flv = s->priv_data;
249 unsigned int timeslen = 0, fileposlen = 0, i;
251 int64_t *times = NULL;
252 int64_t *filepositions = NULL;
253 int ret = AVERROR(ENOSYS);
254 int64_t initial_pos = avio_tell(ioc);
256 if(vstream->nb_index_entries>0){
257 av_log(s, AV_LOG_WARNING, "Skiping duplicate index\n");
261 if (s->flags & AVFMT_FLAG_IGNIDX)
264 while (avio_tell(ioc) < max_pos - 2 && amf_get_string(ioc, str_val, sizeof(str_val)) > 0) {
265 int64_t** current_array;
266 unsigned int arraylen;
268 // Expect array object in context
269 if (avio_r8(ioc) != AMF_DATA_TYPE_ARRAY)
272 arraylen = avio_rb32(ioc);
276 if (!strcmp(KEYFRAMES_TIMESTAMP_TAG , str_val) && !times){
277 current_array= ×
279 }else if (!strcmp(KEYFRAMES_BYTEOFFSET_TAG, str_val) && !filepositions){
280 current_array= &filepositions;
281 fileposlen= arraylen;
282 }else // unexpected metatag inside keyframes, will not use such metadata for indexing
285 if (!(*current_array = av_mallocz(sizeof(**current_array) * arraylen))) {
286 ret = AVERROR(ENOMEM);
290 for (i = 0; i < arraylen && avio_tell(ioc) < max_pos - 1; i++) {
291 if (avio_r8(ioc) != AMF_DATA_TYPE_NUMBER)
293 current_array[0][i] = av_int2double(avio_rb64(ioc));
295 if (times && filepositions) {
296 // All done, exiting at a position allowing amf_parse_object
297 // to finish parsing the object
303 if (timeslen == fileposlen && fileposlen>1 && max_pos <= filepositions[0]) {
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;
315 av_log(s, AV_LOG_WARNING, "Invalid keyframes object, skipping.\n");
320 av_freep(&filepositions);
321 avio_seek(ioc, initial_pos, SEEK_SET);
325 static int amf_parse_object(AVFormatContext *s, AVStream *astream, AVStream *vstream, const char *key, int64_t max_pos, int depth) {
326 AVCodecContext *acodec, *vcodec;
327 FLVContext *flv = s->priv_data;
329 AMFDataType amf_type;
336 amf_type = avio_r8(ioc);
339 case AMF_DATA_TYPE_NUMBER:
340 num_val = av_int2double(avio_rb64(ioc)); break;
341 case AMF_DATA_TYPE_BOOL:
342 num_val = avio_r8(ioc); break;
343 case AMF_DATA_TYPE_STRING:
344 if(amf_get_string(ioc, str_val, sizeof(str_val)) < 0)
347 case AMF_DATA_TYPE_OBJECT:
348 if ((vstream || astream) && ioc->seekable && key && !strcmp(KEYFRAMES_TAG, key) && depth == 1)
349 if (parse_keyframes_index(s, ioc, vstream ? vstream : astream,
351 av_log(s, AV_LOG_ERROR, "Keyframe index parsing failed\n");
353 while (avio_tell(ioc) < max_pos - 2 && amf_get_string(ioc, str_val, sizeof(str_val)) > 0) {
354 if (amf_parse_object(s, astream, vstream, str_val, max_pos, depth + 1) < 0)
355 return -1; //if we couldn't skip, bomb out.
357 if(avio_r8(ioc) != AMF_END_OF_OBJECT)
360 case AMF_DATA_TYPE_NULL:
361 case AMF_DATA_TYPE_UNDEFINED:
362 case AMF_DATA_TYPE_UNSUPPORTED:
363 break; //these take up no additional space
364 case AMF_DATA_TYPE_MIXEDARRAY:
365 avio_skip(ioc, 4); //skip 32-bit max array index
366 while(avio_tell(ioc) < max_pos - 2 && amf_get_string(ioc, str_val, sizeof(str_val)) > 0) {
367 //this is the only case in which we would want a nested parse to not skip over the object
368 if(amf_parse_object(s, astream, vstream, str_val, max_pos, depth + 1) < 0)
371 if(avio_r8(ioc) != AMF_END_OF_OBJECT)
374 case AMF_DATA_TYPE_ARRAY: {
375 unsigned int arraylen, i;
377 arraylen = avio_rb32(ioc);
378 for(i = 0; i < arraylen && avio_tell(ioc) < max_pos - 1; i++) {
379 if(amf_parse_object(s, NULL, NULL, NULL, max_pos, depth + 1) < 0)
380 return -1; //if we couldn't skip, bomb out.
384 case AMF_DATA_TYPE_DATE:
385 avio_skip(ioc, 8 + 2); //timestamp (double) and UTC offset (int16)
387 default: //unsupported type, we couldn't skip
391 if(depth == 1 && key) { //only look for metadata values when we are not nested and key != NULL
392 acodec = astream ? astream->codec : NULL;
393 vcodec = vstream ? vstream->codec : NULL;
395 if (amf_type == AMF_DATA_TYPE_NUMBER) {
396 if (!strcmp(key, "duration"))
397 s->duration = num_val * AV_TIME_BASE;
398 else if (!strcmp(key, "videodatarate") && vcodec && 0 <= (int)(num_val * 1024.0))
399 vcodec->bit_rate = num_val * 1024.0;
400 else if (!strcmp(key, "audiodatarate") && acodec && 0 <= (int)(num_val * 1024.0))
401 acodec->bit_rate = num_val * 1024.0;
402 else if (!strcmp(key, "datastream")) {
403 AVStream *st = create_stream(s, AVMEDIA_TYPE_DATA);
405 return AVERROR(ENOMEM);
406 st->codec->codec_id = AV_CODEC_ID_TEXT;
407 } else if (flv->trust_metadata) {
408 if (!strcmp(key, "videocodecid") && vcodec) {
409 flv_set_video_codec(s, vstream, num_val);
411 if (!strcmp(key, "audiocodecid") && acodec) {
412 flv_set_audio_codec(s, astream, acodec, num_val);
414 if (!strcmp(key, "audiosamplerate") && acodec) {
415 acodec->sample_rate = num_val;
417 if (!strcmp(key, "width") && vcodec) {
418 vcodec->width = num_val;
420 if (!strcmp(key, "height") && vcodec) {
421 vcodec->height = num_val;
426 if (amf_type == AMF_DATA_TYPE_OBJECT && s->nb_streams == 1 &&
427 ((!acodec && !strcmp(key, "audiocodecid")) ||
428 (!vcodec && !strcmp(key, "videocodecid"))))
429 s->ctx_flags &= ~AVFMTCTX_NOHEADER; //If there is either audio/video missing, codecid will be an empty object
431 if (!strcmp(key, "duration") ||
432 !strcmp(key, "filesize") ||
433 !strcmp(key, "width") ||
434 !strcmp(key, "height") ||
435 !strcmp(key, "videodatarate") ||
436 !strcmp(key, "framerate") ||
437 !strcmp(key, "videocodecid") ||
438 !strcmp(key, "audiodatarate") ||
439 !strcmp(key, "audiosamplerate") ||
440 !strcmp(key, "audiosamplesize") ||
441 !strcmp(key, "stereo") ||
442 !strcmp(key, "audiocodecid"))
445 if(amf_type == AMF_DATA_TYPE_BOOL) {
446 av_strlcpy(str_val, num_val > 0 ? "true" : "false", sizeof(str_val));
447 av_dict_set(&s->metadata, key, str_val, 0);
448 } else if(amf_type == AMF_DATA_TYPE_NUMBER) {
449 snprintf(str_val, sizeof(str_val), "%.f", num_val);
450 av_dict_set(&s->metadata, key, str_val, 0);
451 } else if (amf_type == AMF_DATA_TYPE_STRING)
452 av_dict_set(&s->metadata, key, str_val, 0);
458 static int flv_read_metabody(AVFormatContext *s, int64_t next_pos) {
460 AVStream *stream, *astream, *vstream, *dstream;
463 char buffer[11]; //only needs to hold the string "onMetaData". Anything longer is something we don't want.
465 vstream = astream = dstream = NULL;
468 //first object needs to be "onMetaData" string
470 if (type != AMF_DATA_TYPE_STRING ||
471 amf_get_string(ioc, buffer, sizeof(buffer)) < 0)
474 if (!strcmp(buffer, "onTextData"))
477 if (strcmp(buffer, "onMetaData"))
480 //find the streams now so that amf_parse_object doesn't need to do the lookup every time it is called.
481 for(i = 0; i < s->nb_streams; i++) {
482 stream = s->streams[i];
483 if(stream->codec->codec_type == AVMEDIA_TYPE_VIDEO) vstream = stream;
484 else if(stream->codec->codec_type == AVMEDIA_TYPE_AUDIO) astream = stream;
485 else if(stream->codec->codec_type == AVMEDIA_TYPE_DATA) dstream = stream;
488 //parse the second object (we want a mixed array)
489 if(amf_parse_object(s, astream, vstream, buffer, next_pos, 0) < 0)
495 static int flv_read_header(AVFormatContext *s)
500 flags = avio_r8(s->pb);
501 /* old flvtool cleared this field */
502 /* FIXME: better fix needed */
504 flags = FLV_HEADER_FLAG_HASVIDEO | FLV_HEADER_FLAG_HASAUDIO;
505 av_log(s, AV_LOG_WARNING, "Broken FLV file, which says no streams present, this might fail\n");
508 s->ctx_flags |= AVFMTCTX_NOHEADER;
510 if(flags & FLV_HEADER_FLAG_HASVIDEO){
511 if(!create_stream(s, AVMEDIA_TYPE_VIDEO))
512 return AVERROR(ENOMEM);
514 if(flags & FLV_HEADER_FLAG_HASAUDIO){
515 if(!create_stream(s, AVMEDIA_TYPE_AUDIO))
516 return AVERROR(ENOMEM);
518 // Flag doesn't indicate whether or not there is script-data present. Must
519 // create that stream if it's encountered.
521 offset = avio_rb32(s->pb);
522 avio_seek(s->pb, offset, SEEK_SET);
530 static int flv_read_close(AVFormatContext *s)
533 FLVContext *flv = s->priv_data;
534 for(i=0; i<FLV_STREAM_TYPE_NB; i++)
535 av_freep(&flv->new_extradata[i]);
539 static int flv_get_extradata(AVFormatContext *s, AVStream *st, int size)
541 av_free(st->codec->extradata);
542 st->codec->extradata = av_mallocz(size + FF_INPUT_BUFFER_PADDING_SIZE);
543 if (!st->codec->extradata)
544 return AVERROR(ENOMEM);
545 st->codec->extradata_size = size;
546 avio_read(s->pb, st->codec->extradata, st->codec->extradata_size);
550 static int flv_queue_extradata(FLVContext *flv, AVIOContext *pb, int stream,
553 av_free(flv->new_extradata[stream]);
554 flv->new_extradata[stream] = av_mallocz(size + FF_INPUT_BUFFER_PADDING_SIZE);
555 if (!flv->new_extradata[stream])
556 return AVERROR(ENOMEM);
557 flv->new_extradata_size[stream] = size;
558 avio_read(pb, flv->new_extradata[stream], size);
562 static void clear_index_entries(AVFormatContext *s, int64_t pos)
565 av_log(s, AV_LOG_WARNING, "Found invalid index entries, clearing the index.\n");
566 for (i = 0; i < s->nb_streams; i++) {
567 AVStream *st = s->streams[i];
568 /* Remove all index entries that point to >= pos */
570 for (j = 0; j < st->nb_index_entries; j++) {
571 if (st->index_entries[j].pos < pos)
572 st->index_entries[out++] = st->index_entries[j];
574 st->nb_index_entries = out;
579 static int flv_data_packet(AVFormatContext *s, AVPacket *pkt,
580 int64_t dts, int64_t next)
582 int ret = AVERROR_INVALIDDATA, i;
583 AVIOContext *pb = s->pb;
590 if (type == AMF_DATA_TYPE_MIXEDARRAY)
591 avio_seek(pb, 4, SEEK_CUR);
592 else if (type != AMF_DATA_TYPE_OBJECT)
595 amf_get_string(pb, buf, sizeof(buf));
596 if (strcmp(buf, "type") || avio_r8(pb) != AMF_DATA_TYPE_STRING)
599 amf_get_string(pb, buf, sizeof(buf));
600 //FIXME parse it as codec_id
601 amf_get_string(pb, buf, sizeof(buf));
602 if (strcmp(buf, "text") || avio_r8(pb) != AMF_DATA_TYPE_STRING)
605 length = avio_rb16(pb);
606 ret = av_get_packet(s->pb, pkt, length);
612 for (i = 0; i < s->nb_streams; i++) {
614 if (st->codec->codec_type == AVMEDIA_TYPE_DATA)
618 if (i == s->nb_streams) {
619 st = create_stream(s, AVMEDIA_TYPE_DATA);
622 st->codec->codec_id = AV_CODEC_ID_TEXT;
629 pkt->stream_index = st->index;
630 pkt->flags |= AV_PKT_FLAG_KEY;
632 avio_seek(s->pb, next + 4, SEEK_SET);
637 static int flv_read_packet(AVFormatContext *s, AVPacket *pkt)
639 FLVContext *flv = s->priv_data;
640 int ret, i, type, size, flags;
643 int64_t dts, pts = AV_NOPTS_VALUE;
644 int av_uninit(channels);
645 int av_uninit(sample_rate);
648 for(;;avio_skip(s->pb, 4)){ /* pkt size is repeated at end. skip it */
649 pos = avio_tell(s->pb);
650 type = avio_r8(s->pb);
651 size = avio_rb24(s->pb);
652 dts = avio_rb24(s->pb);
653 dts |= avio_r8(s->pb) << 24;
654 av_dlog(s, "type:%d, size:%d, dts:%"PRId64"\n", type, size, dts);
657 avio_skip(s->pb, 3); /* stream id, always 0 */
660 if (flv->validate_next < flv->validate_count) {
661 int64_t validate_pos = flv->validate_index[flv->validate_next].pos;
662 if (pos == validate_pos) {
663 if (FFABS(dts - flv->validate_index[flv->validate_next].dts) <=
664 VALIDATE_INDEX_TS_THRESH) {
665 flv->validate_next++;
667 clear_index_entries(s, validate_pos);
668 flv->validate_count = 0;
670 } else if (pos > validate_pos) {
671 clear_index_entries(s, validate_pos);
672 flv->validate_count = 0;
679 next= size + avio_tell(s->pb);
681 if (type == FLV_TAG_TYPE_AUDIO) {
682 stream_type=FLV_STREAM_TYPE_AUDIO;
683 flags = avio_r8(s->pb);
685 } else if (type == FLV_TAG_TYPE_VIDEO) {
686 stream_type=FLV_STREAM_TYPE_VIDEO;
687 flags = avio_r8(s->pb);
689 if ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_VIDEO_INFO_CMD)
691 } else if (type == FLV_TAG_TYPE_META) {
692 if (size > 13+1+4 && dts == 0) { // Header-type metadata stuff
693 flv_read_metabody(s, next);
695 } else if (dts != 0) { // Script-data "special" metadata frames - don't skip
696 stream_type=FLV_STREAM_TYPE_DATA;
701 av_log(s, AV_LOG_DEBUG, "skipping flv packet: type %d, size %d, flags %d\n", type, size, flags);
703 avio_seek(s->pb, next, SEEK_SET);
707 /* skip empty data packets */
711 /* now find stream */
712 for(i=0;i<s->nb_streams;i++) {
714 if (stream_type == FLV_STREAM_TYPE_AUDIO) {
715 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
716 (s->audio_codec_id || flv_same_audio_codec(st->codec, flags))) {
720 if (stream_type == FLV_STREAM_TYPE_VIDEO) {
721 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
722 (s->video_codec_id || flv_same_video_codec(st->codec, flags))) {
725 } else if (stream_type == FLV_STREAM_TYPE_DATA) {
726 if (st->codec->codec_type == AVMEDIA_TYPE_DATA)
730 if(i == s->nb_streams){
731 av_log(s, AV_LOG_WARNING, "Stream discovered after head already parsed\n");
732 st = create_stream(s,
733 (int[]){AVMEDIA_TYPE_VIDEO, AVMEDIA_TYPE_AUDIO, AVMEDIA_TYPE_DATA}[stream_type]);
735 return AVERROR(ENOMEM);
738 av_dlog(s, "%d %X %d \n", stream_type, flags, st->discard);
739 if( (st->discard >= AVDISCARD_NONKEY && !((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY || (stream_type == FLV_STREAM_TYPE_AUDIO)))
740 ||(st->discard >= AVDISCARD_BIDIR && ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_DISP_INTER && (stream_type == FLV_STREAM_TYPE_VIDEO)))
741 || st->discard >= AVDISCARD_ALL
743 avio_seek(s->pb, next, SEEK_SET);
746 if ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY)
747 av_add_index_entry(st, pos, dts, size, 0, AVINDEX_KEYFRAME);
751 // if not streamed and no duration from metadata then seek to end to find the duration from the timestamps
752 if(s->pb->seekable && (!s->duration || s->duration==AV_NOPTS_VALUE) && !flv->searched_for_end){
754 const int64_t pos= avio_tell(s->pb);
755 int64_t fsize= avio_size(s->pb);
757 avio_seek(s->pb, fsize-4, SEEK_SET);
758 size= avio_rb32(s->pb);
759 avio_seek(s->pb, fsize-3-size, SEEK_SET);
760 if(size == avio_rb24(s->pb) + 11){
761 uint32_t ts = avio_rb24(s->pb);
762 ts |= avio_r8(s->pb) << 24;
764 s->duration = ts * (int64_t)AV_TIME_BASE / 1000;
765 else if (fsize >= 8 && fsize - 8 >= size){
771 avio_seek(s->pb, pos, SEEK_SET);
772 flv->searched_for_end = 1;
775 if(stream_type == FLV_STREAM_TYPE_AUDIO){
776 int bits_per_coded_sample;
777 channels = (flags & FLV_AUDIO_CHANNEL_MASK) == FLV_STEREO ? 2 : 1;
778 sample_rate = (44100 << ((flags & FLV_AUDIO_SAMPLERATE_MASK) >> FLV_AUDIO_SAMPLERATE_OFFSET) >> 3);
779 bits_per_coded_sample = (flags & FLV_AUDIO_SAMPLESIZE_MASK) ? 16 : 8;
780 if(!st->codec->channels || !st->codec->sample_rate || !st->codec->bits_per_coded_sample) {
781 st->codec->channels = channels;
782 st->codec->channel_layout = channels == 1 ? AV_CH_LAYOUT_MONO :
784 st->codec->sample_rate = sample_rate;
785 st->codec->bits_per_coded_sample = bits_per_coded_sample;
787 if(!st->codec->codec_id){
788 flv_set_audio_codec(s, st, st->codec, flags & FLV_AUDIO_CODECID_MASK);
789 flv->last_sample_rate = sample_rate = st->codec->sample_rate;
790 flv->last_channels = channels = st->codec->channels;
793 ctx.sample_rate = sample_rate;
794 flv_set_audio_codec(s, st, &ctx, flags & FLV_AUDIO_CODECID_MASK);
795 sample_rate = ctx.sample_rate;
797 } else if(stream_type == FLV_STREAM_TYPE_VIDEO) {
798 size -= flv_set_video_codec(s, st, flags & FLV_VIDEO_CODECID_MASK);
801 if (st->codec->codec_id == AV_CODEC_ID_AAC ||
802 st->codec->codec_id == AV_CODEC_ID_H264 ||
803 st->codec->codec_id == AV_CODEC_ID_MPEG4) {
804 int type = avio_r8(s->pb);
806 if (st->codec->codec_id == AV_CODEC_ID_H264 || st->codec->codec_id == AV_CODEC_ID_MPEG4) {
807 int32_t cts = (avio_rb24(s->pb)+0xff800000)^0xff800000; // sign extension
809 if (cts < 0) { // dts are wrong
811 av_log(s, AV_LOG_WARNING, "negative cts, previous timestamps might be wrong\n");
814 dts = AV_NOPTS_VALUE;
816 if (type == 0 && (!st->codec->extradata || st->codec->codec_id == AV_CODEC_ID_AAC)) {
817 if (st->codec->extradata) {
818 if ((ret = flv_queue_extradata(flv, s->pb, stream_type, size)) < 0)
820 ret = AVERROR(EAGAIN);
823 if ((ret = flv_get_extradata(s, st, size)) < 0)
825 if (st->codec->codec_id == AV_CODEC_ID_AAC && 0) {
826 MPEG4AudioConfig cfg;
827 if (avpriv_mpeg4audio_get_config(&cfg, st->codec->extradata,
828 st->codec->extradata_size * 8, 1) >= 0) {
829 st->codec->channels = cfg.channels;
830 st->codec->channel_layout = 0;
831 if (cfg.ext_sample_rate)
832 st->codec->sample_rate = cfg.ext_sample_rate;
834 st->codec->sample_rate = cfg.sample_rate;
835 av_dlog(s, "mp4a config channels %d sample rate %d\n",
836 st->codec->channels, st->codec->sample_rate);
840 ret = AVERROR(EAGAIN);
845 /* skip empty data packets */
847 ret = AVERROR(EAGAIN);
851 ret= av_get_packet(s->pb, pkt, size);
855 pkt->pts = pts == AV_NOPTS_VALUE ? dts : pts;
856 pkt->stream_index = st->index;
857 if (flv->new_extradata[stream_type]) {
858 uint8_t *side = av_packet_new_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA,
859 flv->new_extradata_size[stream_type]);
861 memcpy(side, flv->new_extradata[stream_type],
862 flv->new_extradata_size[stream_type]);
863 av_freep(&flv->new_extradata[stream_type]);
864 flv->new_extradata_size[stream_type] = 0;
867 if (stream_type == FLV_STREAM_TYPE_AUDIO && (sample_rate != flv->last_sample_rate ||
868 channels != flv->last_channels)) {
869 flv->last_sample_rate = sample_rate;
870 flv->last_channels = channels;
871 ff_add_param_change(pkt, channels, 0, sample_rate, 0, 0);
874 if ( stream_type == FLV_STREAM_TYPE_AUDIO ||
875 ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY) ||
876 stream_type == FLV_STREAM_TYPE_DATA)
877 pkt->flags |= AV_PKT_FLAG_KEY;
884 static int flv_read_seek(AVFormatContext *s, int stream_index,
885 int64_t ts, int flags)
887 FLVContext *flv = s->priv_data;
888 flv->validate_count = 0;
889 return avio_seek_time(s->pb, stream_index, ts, flags);
892 #define OFFSET(x) offsetof(FLVContext, x)
893 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
894 static const AVOption options[] = {
895 { "flv_metadata", "Allocate streams according the onMetaData array", OFFSET(trust_metadata), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VD},
899 static const AVClass class = {
900 .class_name = "flvdec",
901 .item_name = av_default_item_name,
903 .version = LIBAVUTIL_VERSION_INT,
906 AVInputFormat ff_flv_demuxer = {
908 .long_name = NULL_IF_CONFIG_SMALL("FLV (Flash Video)"),
909 .priv_data_size = sizeof(FLVContext),
910 .read_probe = flv_probe,
911 .read_header = flv_read_header,
912 .read_packet = flv_read_packet,
913 .read_seek = flv_read_seek,
914 .read_close = flv_read_close,
916 .priv_class = &class,