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 probe(AVProbeData *p, int live)
61 const uint8_t *d = p->buf;
62 unsigned offset = AV_RB32(d + 5);
67 d[3] < 5 && d[5] == 0 &&
68 offset + 100 < p->buf_size &&
70 int is_live = !memcmp(d + offset + 40, "NGINX RTMP", 10);
73 return AVPROBE_SCORE_MAX;
78 static int flv_probe(AVProbeData *p)
83 static int live_flv_probe(AVProbeData *p)
88 static AVStream *create_stream(AVFormatContext *s, int codec_type)
90 AVStream *st = avformat_new_stream(s, NULL);
93 st->codec->codec_type = codec_type;
94 if (s->nb_streams>=3 ||( s->nb_streams==2
95 && s->streams[0]->codec->codec_type != AVMEDIA_TYPE_DATA
96 && s->streams[1]->codec->codec_type != AVMEDIA_TYPE_DATA))
97 s->ctx_flags &= ~AVFMTCTX_NOHEADER;
99 avpriv_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
103 static int flv_same_audio_codec(AVCodecContext *acodec, int flags)
105 int bits_per_coded_sample = (flags & FLV_AUDIO_SAMPLESIZE_MASK) ? 16 : 8;
106 int flv_codecid = flags & FLV_AUDIO_CODECID_MASK;
109 if (!acodec->codec_id && !acodec->codec_tag)
112 if (acodec->bits_per_coded_sample != bits_per_coded_sample)
115 switch (flv_codecid) {
116 // no distinction between S16 and S8 PCM codec flags
117 case FLV_CODECID_PCM:
118 codec_id = bits_per_coded_sample == 8
121 : AV_CODEC_ID_PCM_S16BE;
123 : AV_CODEC_ID_PCM_S16LE;
125 return codec_id == acodec->codec_id;
126 case FLV_CODECID_PCM_LE:
127 codec_id = bits_per_coded_sample == 8
129 : AV_CODEC_ID_PCM_S16LE;
130 return codec_id == acodec->codec_id;
131 case FLV_CODECID_AAC:
132 return acodec->codec_id == AV_CODEC_ID_AAC;
133 case FLV_CODECID_ADPCM:
134 return acodec->codec_id == AV_CODEC_ID_ADPCM_SWF;
135 case FLV_CODECID_SPEEX:
136 return acodec->codec_id == AV_CODEC_ID_SPEEX;
137 case FLV_CODECID_MP3:
138 return acodec->codec_id == AV_CODEC_ID_MP3;
139 case FLV_CODECID_NELLYMOSER_8KHZ_MONO:
140 case FLV_CODECID_NELLYMOSER_16KHZ_MONO:
141 case FLV_CODECID_NELLYMOSER:
142 return acodec->codec_id == AV_CODEC_ID_NELLYMOSER;
143 case FLV_CODECID_PCM_MULAW:
144 return acodec->sample_rate == 8000 &&
145 acodec->codec_id == AV_CODEC_ID_PCM_MULAW;
146 case FLV_CODECID_PCM_ALAW:
147 return acodec->sample_rate == 8000 &&
148 acodec->codec_id == AV_CODEC_ID_PCM_ALAW;
150 return acodec->codec_tag == (flv_codecid >> FLV_AUDIO_CODECID_OFFSET);
154 static void flv_set_audio_codec(AVFormatContext *s, AVStream *astream,
155 AVCodecContext *acodec, int flv_codecid)
157 switch (flv_codecid) {
158 // no distinction between S16 and S8 PCM codec flags
159 case FLV_CODECID_PCM:
160 acodec->codec_id = acodec->bits_per_coded_sample == 8
163 : AV_CODEC_ID_PCM_S16BE;
165 : AV_CODEC_ID_PCM_S16LE;
168 case FLV_CODECID_PCM_LE:
169 acodec->codec_id = acodec->bits_per_coded_sample == 8
171 : AV_CODEC_ID_PCM_S16LE;
173 case FLV_CODECID_AAC:
174 acodec->codec_id = AV_CODEC_ID_AAC;
176 case FLV_CODECID_ADPCM:
177 acodec->codec_id = AV_CODEC_ID_ADPCM_SWF;
179 case FLV_CODECID_SPEEX:
180 acodec->codec_id = AV_CODEC_ID_SPEEX;
181 acodec->sample_rate = 16000;
183 case FLV_CODECID_MP3:
184 acodec->codec_id = AV_CODEC_ID_MP3;
185 astream->need_parsing = AVSTREAM_PARSE_FULL;
187 case FLV_CODECID_NELLYMOSER_8KHZ_MONO:
188 // in case metadata does not otherwise declare samplerate
189 acodec->sample_rate = 8000;
190 acodec->codec_id = AV_CODEC_ID_NELLYMOSER;
192 case FLV_CODECID_NELLYMOSER_16KHZ_MONO:
193 acodec->sample_rate = 16000;
194 acodec->codec_id = AV_CODEC_ID_NELLYMOSER;
196 case FLV_CODECID_NELLYMOSER:
197 acodec->codec_id = AV_CODEC_ID_NELLYMOSER;
199 case FLV_CODECID_PCM_MULAW:
200 acodec->sample_rate = 8000;
201 acodec->codec_id = AV_CODEC_ID_PCM_MULAW;
203 case FLV_CODECID_PCM_ALAW:
204 acodec->sample_rate = 8000;
205 acodec->codec_id = AV_CODEC_ID_PCM_ALAW;
208 avpriv_request_sample(s, "Audio codec (%x)",
209 flv_codecid >> FLV_AUDIO_CODECID_OFFSET);
210 acodec->codec_tag = flv_codecid >> FLV_AUDIO_CODECID_OFFSET;
214 static int flv_same_video_codec(AVCodecContext *vcodec, int flags)
216 int flv_codecid = flags & FLV_VIDEO_CODECID_MASK;
218 if (!vcodec->codec_id && !vcodec->codec_tag)
221 switch (flv_codecid) {
222 case FLV_CODECID_H263:
223 return vcodec->codec_id == AV_CODEC_ID_FLV1;
224 case FLV_CODECID_SCREEN:
225 return vcodec->codec_id == AV_CODEC_ID_FLASHSV;
226 case FLV_CODECID_SCREEN2:
227 return vcodec->codec_id == AV_CODEC_ID_FLASHSV2;
228 case FLV_CODECID_VP6:
229 return vcodec->codec_id == AV_CODEC_ID_VP6F;
230 case FLV_CODECID_VP6A:
231 return vcodec->codec_id == AV_CODEC_ID_VP6A;
232 case FLV_CODECID_H264:
233 return vcodec->codec_id == AV_CODEC_ID_H264;
235 return vcodec->codec_tag == flv_codecid;
239 static int flv_set_video_codec(AVFormatContext *s, AVStream *vstream,
240 int flv_codecid, int read)
242 AVCodecContext *vcodec = vstream->codec;
243 switch (flv_codecid) {
244 case FLV_CODECID_H263:
245 vcodec->codec_id = AV_CODEC_ID_FLV1;
247 case FLV_CODECID_REALH263:
248 vcodec->codec_id = AV_CODEC_ID_H263;
249 break; // Really mean it this time
250 case FLV_CODECID_SCREEN:
251 vcodec->codec_id = AV_CODEC_ID_FLASHSV;
253 case FLV_CODECID_SCREEN2:
254 vcodec->codec_id = AV_CODEC_ID_FLASHSV2;
256 case FLV_CODECID_VP6:
257 vcodec->codec_id = AV_CODEC_ID_VP6F;
258 case FLV_CODECID_VP6A:
259 if (flv_codecid == FLV_CODECID_VP6A)
260 vcodec->codec_id = AV_CODEC_ID_VP6A;
262 if (vcodec->extradata_size != 1) {
263 ff_alloc_extradata(vcodec, 1);
265 if (vcodec->extradata)
266 vcodec->extradata[0] = avio_r8(s->pb);
270 return 1; // 1 byte body size adjustment for flv_read_packet()
271 case FLV_CODECID_H264:
272 vcodec->codec_id = AV_CODEC_ID_H264;
273 vstream->need_parsing = AVSTREAM_PARSE_HEADERS;
274 return 3; // not 4, reading packet type will consume one byte
275 case FLV_CODECID_MPEG4:
276 vcodec->codec_id = AV_CODEC_ID_MPEG4;
279 avpriv_request_sample(s, "Video codec (%x)", flv_codecid);
280 vcodec->codec_tag = flv_codecid;
286 static int amf_get_string(AVIOContext *ioc, char *buffer, int buffsize)
288 int length = avio_rb16(ioc);
289 if (length >= buffsize) {
290 avio_skip(ioc, length);
294 avio_read(ioc, buffer, length);
296 buffer[length] = '\0';
301 static int parse_keyframes_index(AVFormatContext *s, AVIOContext *ioc,
302 AVStream *vstream, int64_t max_pos)
304 FLVContext *flv = s->priv_data;
305 unsigned int timeslen = 0, fileposlen = 0, i;
307 int64_t *times = NULL;
308 int64_t *filepositions = NULL;
309 int ret = AVERROR(ENOSYS);
310 int64_t initial_pos = avio_tell(ioc);
312 if (vstream->nb_index_entries>0) {
313 av_log(s, AV_LOG_WARNING, "Skipping duplicate index\n");
317 if (s->flags & AVFMT_FLAG_IGNIDX)
320 while (avio_tell(ioc) < max_pos - 2 &&
321 amf_get_string(ioc, str_val, sizeof(str_val)) > 0) {
322 int64_t **current_array;
323 unsigned int arraylen;
325 // Expect array object in context
326 if (avio_r8(ioc) != AMF_DATA_TYPE_ARRAY)
329 arraylen = avio_rb32(ioc);
333 if (!strcmp(KEYFRAMES_TIMESTAMP_TAG , str_val) && !times) {
334 current_array = ×
336 } else if (!strcmp(KEYFRAMES_BYTEOFFSET_TAG, str_val) &&
338 current_array = &filepositions;
339 fileposlen = arraylen;
341 // unexpected metatag inside keyframes, will not use such
342 // metadata for indexing
345 if (!(*current_array = av_mallocz(sizeof(**current_array) * arraylen))) {
346 ret = AVERROR(ENOMEM);
350 for (i = 0; i < arraylen && avio_tell(ioc) < max_pos - 1; i++) {
351 if (avio_r8(ioc) != AMF_DATA_TYPE_NUMBER)
353 current_array[0][i] = av_int2double(avio_rb64(ioc));
355 if (times && filepositions) {
356 // All done, exiting at a position allowing amf_parse_object
357 // to finish parsing the object
363 if (timeslen == fileposlen && fileposlen>1 && max_pos <= filepositions[0]) {
364 for (i = 0; i < fileposlen; i++) {
365 av_add_index_entry(vstream, filepositions[i], times[i] * 1000,
366 0, 0, AVINDEX_KEYFRAME);
368 flv->validate_index[i].pos = filepositions[i];
369 flv->validate_index[i].dts = times[i] * 1000;
370 flv->validate_count = i + 1;
375 av_log(s, AV_LOG_WARNING, "Invalid keyframes object, skipping.\n");
380 av_freep(&filepositions);
381 avio_seek(ioc, initial_pos, SEEK_SET);
385 static int amf_parse_object(AVFormatContext *s, AVStream *astream,
386 AVStream *vstream, const char *key,
387 int64_t max_pos, int depth)
389 AVCodecContext *acodec, *vcodec;
390 FLVContext *flv = s->priv_data;
392 AMFDataType amf_type;
398 amf_type = avio_r8(ioc);
401 case AMF_DATA_TYPE_NUMBER:
402 num_val = av_int2double(avio_rb64(ioc));
404 case AMF_DATA_TYPE_BOOL:
405 num_val = avio_r8(ioc);
407 case AMF_DATA_TYPE_STRING:
408 if (amf_get_string(ioc, str_val, sizeof(str_val)) < 0)
411 case AMF_DATA_TYPE_OBJECT:
412 if ((vstream || astream) && key &&
414 !strcmp(KEYFRAMES_TAG, key) && depth == 1)
415 if (parse_keyframes_index(s, ioc, vstream ? vstream : astream,
417 av_log(s, AV_LOG_ERROR, "Keyframe index parsing failed\n");
419 while (avio_tell(ioc) < max_pos - 2 &&
420 amf_get_string(ioc, str_val, sizeof(str_val)) > 0)
421 if (amf_parse_object(s, astream, vstream, str_val, max_pos,
423 return -1; // if we couldn't skip, bomb out.
424 if (avio_r8(ioc) != AMF_END_OF_OBJECT)
427 case AMF_DATA_TYPE_NULL:
428 case AMF_DATA_TYPE_UNDEFINED:
429 case AMF_DATA_TYPE_UNSUPPORTED:
430 break; // these take up no additional space
431 case AMF_DATA_TYPE_MIXEDARRAY:
432 avio_skip(ioc, 4); // skip 32-bit max array index
433 while (avio_tell(ioc) < max_pos - 2 &&
434 amf_get_string(ioc, str_val, sizeof(str_val)) > 0)
435 // this is the only case in which we would want a nested
436 // parse to not skip over the object
437 if (amf_parse_object(s, astream, vstream, str_val, max_pos,
440 if (avio_r8(ioc) != AMF_END_OF_OBJECT)
443 case AMF_DATA_TYPE_ARRAY:
445 unsigned int arraylen, i;
447 arraylen = avio_rb32(ioc);
448 for (i = 0; i < arraylen && avio_tell(ioc) < max_pos - 1; i++)
449 if (amf_parse_object(s, NULL, NULL, NULL, max_pos,
451 return -1; // if we couldn't skip, bomb out.
454 case AMF_DATA_TYPE_DATE:
455 avio_skip(ioc, 8 + 2); // timestamp (double) and UTC offset (int16)
457 default: // unsupported type, we couldn't skip
461 // only look for metadata values when we are not nested and key != NULL
462 if (depth == 1 && key) {
463 acodec = astream ? astream->codec : NULL;
464 vcodec = vstream ? vstream->codec : NULL;
466 if (amf_type == AMF_DATA_TYPE_NUMBER ||
467 amf_type == AMF_DATA_TYPE_BOOL) {
468 if (!strcmp(key, "duration"))
469 s->duration = num_val * AV_TIME_BASE;
470 else if (!strcmp(key, "videodatarate") && vcodec &&
471 0 <= (int)(num_val * 1024.0))
472 vcodec->bit_rate = num_val * 1024.0;
473 else if (!strcmp(key, "audiodatarate") && acodec &&
474 0 <= (int)(num_val * 1024.0))
475 acodec->bit_rate = num_val * 1024.0;
476 else if (!strcmp(key, "datastream")) {
477 AVStream *st = create_stream(s, AVMEDIA_TYPE_DATA);
479 return AVERROR(ENOMEM);
480 st->codec->codec_id = AV_CODEC_ID_TEXT;
481 } else if (flv->trust_metadata) {
482 if (!strcmp(key, "videocodecid") && vcodec) {
483 flv_set_video_codec(s, vstream, num_val, 0);
484 } else if (!strcmp(key, "audiocodecid") && acodec) {
485 int id = ((int)num_val) << FLV_AUDIO_CODECID_OFFSET;
486 flv_set_audio_codec(s, astream, acodec, id);
487 } else if (!strcmp(key, "audiosamplerate") && acodec) {
488 acodec->sample_rate = num_val;
489 } else if (!strcmp(key, "audiosamplesize") && acodec) {
490 acodec->bits_per_coded_sample = num_val;
491 } else if (!strcmp(key, "stereo") && acodec) {
492 acodec->channels = num_val + 1;
493 acodec->channel_layout = acodec->channels == 2 ?
494 AV_CH_LAYOUT_STEREO :
496 } else if (!strcmp(key, "width") && vcodec) {
497 vcodec->width = num_val;
498 } else if (!strcmp(key, "height") && vcodec) {
499 vcodec->height = num_val;
504 if (amf_type == AMF_DATA_TYPE_OBJECT && s->nb_streams == 1 &&
505 ((!acodec && !strcmp(key, "audiocodecid")) ||
506 (!vcodec && !strcmp(key, "videocodecid"))))
507 s->ctx_flags &= ~AVFMTCTX_NOHEADER; //If there is either audio/video missing, codecid will be an empty object
509 if (!strcmp(key, "duration") ||
510 !strcmp(key, "filesize") ||
511 !strcmp(key, "width") ||
512 !strcmp(key, "height") ||
513 !strcmp(key, "videodatarate") ||
514 !strcmp(key, "framerate") ||
515 !strcmp(key, "videocodecid") ||
516 !strcmp(key, "audiodatarate") ||
517 !strcmp(key, "audiosamplerate") ||
518 !strcmp(key, "audiosamplesize") ||
519 !strcmp(key, "stereo") ||
520 !strcmp(key, "audiocodecid") ||
521 !strcmp(key, "datastream"))
524 if (amf_type == AMF_DATA_TYPE_BOOL) {
525 av_strlcpy(str_val, num_val > 0 ? "true" : "false",
527 av_dict_set(&s->metadata, key, str_val, 0);
528 } else if (amf_type == AMF_DATA_TYPE_NUMBER) {
529 snprintf(str_val, sizeof(str_val), "%.f", num_val);
530 av_dict_set(&s->metadata, key, str_val, 0);
531 } else if (amf_type == AMF_DATA_TYPE_STRING)
532 av_dict_set(&s->metadata, key, str_val, 0);
538 static int flv_read_metabody(AVFormatContext *s, int64_t next_pos)
541 AVStream *stream, *astream, *vstream;
542 AVStream av_unused *dstream;
545 // only needs to hold the string "onMetaData".
546 // Anything longer is something we don't want.
554 // first object needs to be "onMetaData" string
556 if (type != AMF_DATA_TYPE_STRING ||
557 amf_get_string(ioc, buffer, sizeof(buffer)) < 0)
560 if (!strcmp(buffer, "onTextData"))
563 if (strcmp(buffer, "onMetaData"))
566 // find the streams now so that amf_parse_object doesn't need to do
567 // the lookup every time it is called.
568 for (i = 0; i < s->nb_streams; i++) {
569 stream = s->streams[i];
570 if (stream->codec->codec_type == AVMEDIA_TYPE_VIDEO)
572 else if (stream->codec->codec_type == AVMEDIA_TYPE_AUDIO)
574 else if (stream->codec->codec_type == AVMEDIA_TYPE_DATA)
578 // parse the second object (we want a mixed array)
579 if (amf_parse_object(s, astream, vstream, buffer, next_pos, 0) < 0)
585 static int flv_read_header(AVFormatContext *s)
590 flags = avio_r8(s->pb);
592 s->ctx_flags |= AVFMTCTX_NOHEADER;
594 if (flags & FLV_HEADER_FLAG_HASVIDEO)
595 if (!create_stream(s, AVMEDIA_TYPE_VIDEO))
596 return AVERROR(ENOMEM);
597 if (flags & FLV_HEADER_FLAG_HASAUDIO)
598 if (!create_stream(s, AVMEDIA_TYPE_AUDIO))
599 return AVERROR(ENOMEM);
600 // Flag doesn't indicate whether or not there is script-data present. Must
601 // create that stream if it's encountered.
603 offset = avio_rb32(s->pb);
604 avio_seek(s->pb, offset, SEEK_SET);
612 static int flv_read_close(AVFormatContext *s)
615 FLVContext *flv = s->priv_data;
616 for (i=0; i<FLV_STREAM_TYPE_NB; i++)
617 av_freep(&flv->new_extradata[i]);
621 static int flv_get_extradata(AVFormatContext *s, AVStream *st, int size)
623 av_free(st->codec->extradata);
624 if (ff_get_extradata(st->codec, s->pb, size) < 0)
625 return AVERROR(ENOMEM);
629 static int flv_queue_extradata(FLVContext *flv, AVIOContext *pb, int stream,
632 av_free(flv->new_extradata[stream]);
633 flv->new_extradata[stream] = av_mallocz(size +
634 FF_INPUT_BUFFER_PADDING_SIZE);
635 if (!flv->new_extradata[stream])
636 return AVERROR(ENOMEM);
637 flv->new_extradata_size[stream] = size;
638 avio_read(pb, flv->new_extradata[stream], size);
642 static void clear_index_entries(AVFormatContext *s, int64_t pos)
645 av_log(s, AV_LOG_WARNING,
646 "Found invalid index entries, clearing the index.\n");
647 for (i = 0; i < s->nb_streams; i++) {
648 AVStream *st = s->streams[i];
649 /* Remove all index entries that point to >= pos */
651 for (j = 0; j < st->nb_index_entries; j++)
652 if (st->index_entries[j].pos < pos)
653 st->index_entries[out++] = st->index_entries[j];
654 st->nb_index_entries = out;
658 static int amf_skip_tag(AVIOContext *pb, AMFDataType type)
660 int nb = -1, ret, parse_name = 1;
663 case AMF_DATA_TYPE_NUMBER:
666 case AMF_DATA_TYPE_BOOL:
669 case AMF_DATA_TYPE_STRING:
670 avio_skip(pb, avio_rb16(pb));
672 case AMF_DATA_TYPE_ARRAY:
674 case AMF_DATA_TYPE_MIXEDARRAY:
676 case AMF_DATA_TYPE_OBJECT:
677 while(!pb->eof_reached && (nb-- > 0 || type != AMF_DATA_TYPE_ARRAY)) {
679 int size = avio_rb16(pb);
686 if ((ret = amf_skip_tag(pb, avio_r8(pb))) < 0)
690 case AMF_DATA_TYPE_NULL:
691 case AMF_DATA_TYPE_OBJECT_END:
694 return AVERROR_INVALIDDATA;
699 static int flv_data_packet(AVFormatContext *s, AVPacket *pkt,
700 int64_t dts, int64_t next)
702 AVIOContext *pb = s->pb;
705 int ret = AVERROR_INVALIDDATA;
708 switch (avio_r8(pb)) {
709 case AMF_DATA_TYPE_MIXEDARRAY:
710 avio_seek(pb, 4, SEEK_CUR);
711 case AMF_DATA_TYPE_OBJECT:
717 while ((ret = amf_get_string(pb, buf, sizeof(buf))) > 0) {
718 AMFDataType type = avio_r8(pb);
719 if (type == AMF_DATA_TYPE_STRING && !strcmp(buf, "text")) {
720 length = avio_rb16(pb);
721 ret = av_get_packet(pb, pkt, length);
727 if ((ret = amf_skip_tag(pb, type)) < 0)
733 ret = AVERROR_INVALIDDATA;
737 for (i = 0; i < s->nb_streams; i++) {
739 if (st->codec->codec_type == AVMEDIA_TYPE_DATA)
743 if (i == s->nb_streams) {
744 st = create_stream(s, AVMEDIA_TYPE_DATA);
746 return AVERROR_INVALIDDATA;
747 st->codec->codec_id = AV_CODEC_ID_TEXT;
754 pkt->stream_index = st->index;
755 pkt->flags |= AV_PKT_FLAG_KEY;
758 avio_seek(s->pb, next + 4, SEEK_SET);
763 static int flv_read_packet(AVFormatContext *s, AVPacket *pkt)
765 FLVContext *flv = s->priv_data;
766 int ret, i, type, size, flags;
768 int64_t next, pos, meta_pos;
769 int64_t dts, pts = AV_NOPTS_VALUE;
770 int av_uninit(channels);
771 int av_uninit(sample_rate);
774 /* pkt size is repeated at end. skip it */
775 for (;; avio_skip(s->pb, 4)) {
776 pos = avio_tell(s->pb);
777 type = avio_r8(s->pb);
778 size = avio_rb24(s->pb);
779 dts = avio_rb24(s->pb);
780 dts |= avio_r8(s->pb) << 24;
781 av_dlog(s, "type:%d, size:%d, dts:%"PRId64" pos:%"PRId64"\n", type, size, dts, avio_tell(s->pb));
784 avio_skip(s->pb, 3); /* stream id, always 0 */
787 if (flv->validate_next < flv->validate_count) {
788 int64_t validate_pos = flv->validate_index[flv->validate_next].pos;
789 if (pos == validate_pos) {
790 if (FFABS(dts - flv->validate_index[flv->validate_next].dts) <=
791 VALIDATE_INDEX_TS_THRESH) {
792 flv->validate_next++;
794 clear_index_entries(s, validate_pos);
795 flv->validate_count = 0;
797 } else if (pos > validate_pos) {
798 clear_index_entries(s, validate_pos);
799 flv->validate_count = 0;
806 next = size + avio_tell(s->pb);
808 if (type == FLV_TAG_TYPE_AUDIO) {
809 stream_type = FLV_STREAM_TYPE_AUDIO;
810 flags = avio_r8(s->pb);
812 } else if (type == FLV_TAG_TYPE_VIDEO) {
813 stream_type = FLV_STREAM_TYPE_VIDEO;
814 flags = avio_r8(s->pb);
816 if ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_VIDEO_INFO_CMD)
818 } else if (type == FLV_TAG_TYPE_META) {
819 stream_type=FLV_STREAM_TYPE_DATA;
820 if (size > 13 + 1 + 4 && dts == 0) { // Header-type metadata stuff
821 meta_pos = avio_tell(s->pb);
822 if (flv_read_metabody(s, next) == 0) {
825 avio_seek(s->pb, meta_pos, SEEK_SET);
828 av_log(s, AV_LOG_DEBUG,
829 "Skipping flv packet: type %d, size %d, flags %d.\n",
832 avio_seek(s->pb, next, SEEK_SET);
836 /* skip empty data packets */
840 /* now find stream */
841 for (i = 0; i < s->nb_streams; i++) {
843 if (stream_type == FLV_STREAM_TYPE_AUDIO) {
844 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
845 (s->audio_codec_id || flv_same_audio_codec(st->codec, flags)))
847 } else if (stream_type == FLV_STREAM_TYPE_VIDEO) {
848 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
849 (s->video_codec_id || flv_same_video_codec(st->codec, flags)))
851 } else if (stream_type == FLV_STREAM_TYPE_DATA) {
852 if (st->codec->codec_type == AVMEDIA_TYPE_DATA)
856 if (i == s->nb_streams) {
857 static const enum AVMediaType stream_types[] = {AVMEDIA_TYPE_VIDEO, AVMEDIA_TYPE_AUDIO, AVMEDIA_TYPE_DATA};
858 av_log(s, AV_LOG_WARNING, "Stream discovered after head already parsed\n");
859 st = create_stream(s, stream_types[stream_type]);
861 return AVERROR(ENOMEM);
864 av_dlog(s, "%d %X %d \n", stream_type, flags, st->discard);
865 if ( (st->discard >= AVDISCARD_NONKEY && !((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY || (stream_type == FLV_STREAM_TYPE_AUDIO)))
866 ||(st->discard >= AVDISCARD_BIDIR && ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_DISP_INTER && (stream_type == FLV_STREAM_TYPE_VIDEO)))
867 || st->discard >= AVDISCARD_ALL
869 avio_seek(s->pb, next, SEEK_SET);
872 if ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY || stream_type == FLV_STREAM_TYPE_AUDIO)
873 av_add_index_entry(st, pos, dts, size, 0, AVINDEX_KEYFRAME);
877 // if not streamed and no duration from metadata then seek to end to find
878 // the duration from the timestamps
879 if (s->pb->seekable && (!s->duration || s->duration == AV_NOPTS_VALUE) && !flv->searched_for_end) {
881 const int64_t pos = avio_tell(s->pb);
882 int64_t fsize = avio_size(s->pb);
884 avio_seek(s->pb, fsize - 4, SEEK_SET);
885 size = avio_rb32(s->pb);
886 avio_seek(s->pb, fsize - 3 - size, SEEK_SET);
887 if (size == avio_rb24(s->pb) + 11) {
888 uint32_t ts = avio_rb24(s->pb);
889 ts |= avio_r8(s->pb) << 24;
891 s->duration = ts * (int64_t)AV_TIME_BASE / 1000;
892 else if (fsize >= 8 && fsize - 8 >= size) {
898 avio_seek(s->pb, pos, SEEK_SET);
899 flv->searched_for_end = 1;
902 if (stream_type == FLV_STREAM_TYPE_AUDIO) {
903 int bits_per_coded_sample;
904 channels = (flags & FLV_AUDIO_CHANNEL_MASK) == FLV_STEREO ? 2 : 1;
905 sample_rate = 44100 << ((flags & FLV_AUDIO_SAMPLERATE_MASK) >>
906 FLV_AUDIO_SAMPLERATE_OFFSET) >> 3;
907 bits_per_coded_sample = (flags & FLV_AUDIO_SAMPLESIZE_MASK) ? 16 : 8;
908 if (!st->codec->channels || !st->codec->sample_rate ||
909 !st->codec->bits_per_coded_sample) {
910 st->codec->channels = channels;
911 st->codec->channel_layout = channels == 1
913 : AV_CH_LAYOUT_STEREO;
914 st->codec->sample_rate = sample_rate;
915 st->codec->bits_per_coded_sample = bits_per_coded_sample;
917 if (!st->codec->codec_id) {
918 flv_set_audio_codec(s, st, st->codec,
919 flags & FLV_AUDIO_CODECID_MASK);
920 flv->last_sample_rate =
921 sample_rate = st->codec->sample_rate;
923 channels = st->codec->channels;
925 AVCodecContext ctx = {0};
926 ctx.sample_rate = sample_rate;
927 flv_set_audio_codec(s, st, &ctx, flags & FLV_AUDIO_CODECID_MASK);
928 sample_rate = ctx.sample_rate;
930 } else if (stream_type == FLV_STREAM_TYPE_VIDEO) {
931 size -= flv_set_video_codec(s, st, flags & FLV_VIDEO_CODECID_MASK, 1);
934 if (st->codec->codec_id == AV_CODEC_ID_AAC ||
935 st->codec->codec_id == AV_CODEC_ID_H264 ||
936 st->codec->codec_id == AV_CODEC_ID_MPEG4) {
937 int type = avio_r8(s->pb);
939 if (st->codec->codec_id == AV_CODEC_ID_H264 || st->codec->codec_id == AV_CODEC_ID_MPEG4) {
941 int32_t cts = (avio_rb24(s->pb) + 0xff800000) ^ 0xff800000;
943 if (cts < 0) { // dts might be wrong
945 av_log(s, AV_LOG_WARNING,
946 "Negative cts, previous timestamps might be wrong.\n");
948 } else if (FFABS(dts - pts) > 1000*60*15) {
949 av_log(s, AV_LOG_WARNING,
950 "invalid timestamps %"PRId64" %"PRId64"\n", dts, pts);
951 dts = pts = AV_NOPTS_VALUE;
954 if (type == 0 && (!st->codec->extradata || st->codec->codec_id == AV_CODEC_ID_AAC)) {
955 AVDictionaryEntry *t;
957 if (st->codec->extradata) {
958 if ((ret = flv_queue_extradata(flv, s->pb, stream_type, size)) < 0)
960 ret = AVERROR(EAGAIN);
963 if ((ret = flv_get_extradata(s, st, size)) < 0)
966 /* Workaround for buggy Omnia A/XE encoder */
967 t = av_dict_get(s->metadata, "Encoder", NULL, 0);
968 if (st->codec->codec_id == AV_CODEC_ID_AAC && t && !strcmp(t->value, "Omnia A/XE"))
969 st->codec->extradata_size = 2;
971 if (st->codec->codec_id == AV_CODEC_ID_AAC && 0) {
972 MPEG4AudioConfig cfg;
974 if (avpriv_mpeg4audio_get_config(&cfg, st->codec->extradata,
975 st->codec->extradata_size * 8, 1) >= 0) {
976 st->codec->channels = cfg.channels;
977 st->codec->channel_layout = 0;
978 if (cfg.ext_sample_rate)
979 st->codec->sample_rate = cfg.ext_sample_rate;
981 st->codec->sample_rate = cfg.sample_rate;
982 av_dlog(s, "mp4a config channels %d sample rate %d\n",
983 st->codec->channels, st->codec->sample_rate);
987 ret = AVERROR(EAGAIN);
992 /* skip empty data packets */
994 ret = AVERROR(EAGAIN);
998 ret = av_get_packet(s->pb, pkt, size);
1002 pkt->pts = pts == AV_NOPTS_VALUE ? dts : pts;
1003 pkt->stream_index = st->index;
1004 if (flv->new_extradata[stream_type]) {
1005 uint8_t *side = av_packet_new_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA,
1006 flv->new_extradata_size[stream_type]);
1008 memcpy(side, flv->new_extradata[stream_type],
1009 flv->new_extradata_size[stream_type]);
1010 av_freep(&flv->new_extradata[stream_type]);
1011 flv->new_extradata_size[stream_type] = 0;
1014 if (stream_type == FLV_STREAM_TYPE_AUDIO &&
1015 (sample_rate != flv->last_sample_rate ||
1016 channels != flv->last_channels)) {
1017 flv->last_sample_rate = sample_rate;
1018 flv->last_channels = channels;
1019 ff_add_param_change(pkt, channels, 0, sample_rate, 0, 0);
1022 if ( stream_type == FLV_STREAM_TYPE_AUDIO ||
1023 ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY) ||
1024 stream_type == FLV_STREAM_TYPE_DATA)
1025 pkt->flags |= AV_PKT_FLAG_KEY;
1028 avio_skip(s->pb, 4);
1032 static int flv_read_seek(AVFormatContext *s, int stream_index,
1033 int64_t ts, int flags)
1035 FLVContext *flv = s->priv_data;
1036 flv->validate_count = 0;
1037 return avio_seek_time(s->pb, stream_index, ts, flags);
1040 #define OFFSET(x) offsetof(FLVContext, x)
1041 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
1042 static const AVOption options[] = {
1043 { "flv_metadata", "Allocate streams according to the onMetaData array", OFFSET(trust_metadata), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VD },
1047 static const AVClass flv_class = {
1048 .class_name = "flvdec",
1049 .item_name = av_default_item_name,
1051 .version = LIBAVUTIL_VERSION_INT,
1054 AVInputFormat ff_flv_demuxer = {
1056 .long_name = NULL_IF_CONFIG_SMALL("FLV (Flash Video)"),
1057 .priv_data_size = sizeof(FLVContext),
1058 .read_probe = flv_probe,
1059 .read_header = flv_read_header,
1060 .read_packet = flv_read_packet,
1061 .read_seek = flv_read_seek,
1062 .read_close = flv_read_close,
1063 .extensions = "flv",
1064 .priv_class = &flv_class,
1067 static const AVClass live_flv_class = {
1068 .class_name = "live_flvdec",
1069 .item_name = av_default_item_name,
1071 .version = LIBAVUTIL_VERSION_INT,
1074 AVInputFormat ff_live_flv_demuxer = {
1076 .long_name = NULL_IF_CONFIG_SMALL("live RTMP FLV (Flash Video)"),
1077 .priv_data_size = sizeof(FLVContext),
1078 .read_probe = live_flv_probe,
1079 .read_header = flv_read_header,
1080 .read_packet = flv_read_packet,
1081 .read_seek = flv_read_seek,
1082 .read_close = flv_read_close,
1083 .extensions = "flv",
1084 .priv_class = &live_flv_class,
1085 .flags = AVFMT_TS_DISCONT