3 * Copyright (c) 2003 The FFmpeg Project.
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 static int flv_probe(AVProbeData *p)
28 if (d[0] == 'F' && d[1] == 'L' && d[2] == 'V') {
34 static int flv_read_header(AVFormatContext *s,
35 AVFormatParameters *ap)
37 int offset, flags, size;
39 s->ctx_flags |= AVFMTCTX_NOHEADER; //ok we have a header but theres no fps, codec type, sample_rate, ...
42 flags = get_byte(&s->pb);
44 offset = get_be32(&s->pb);
46 if(!url_is_streamed(&s->pb)){
47 const int fsize= url_fsize(&s->pb);
48 url_fseek(&s->pb, fsize-4, SEEK_SET);
49 size= get_be32(&s->pb);
50 url_fseek(&s->pb, fsize-3-size, SEEK_SET);
51 if(size == get_be24(&s->pb) + 11){
52 s->duration= get_be24(&s->pb) * (int64_t)AV_TIME_BASE / 1000;
56 url_fseek(&s->pb, offset, SEEK_SET);
63 static int flv_read_packet(AVFormatContext *s, AVPacket *pkt)
65 int ret, i, type, size, pts, flags, is_audio, next, pos;
69 pos = url_ftell(&s->pb);
70 url_fskip(&s->pb, 4); /* size of previous packet */
71 type = get_byte(&s->pb);
72 size = get_be24(&s->pb);
73 pts = get_be24(&s->pb);
74 // av_log(s, AV_LOG_DEBUG, "type:%d, size:%d, pts:%d\n", type, size, pts);
77 url_fskip(&s->pb, 4); /* reserved */
83 next= size + url_ftell(&s->pb);
87 flags = get_byte(&s->pb);
88 } else if (type == 9) {
90 flags = get_byte(&s->pb);
91 } else if (type == 18 && size > 13+1+4) {
92 url_fskip(&s->pb, 13); //onMetaData blah
93 if(get_byte(&s->pb) == 8){
96 while(url_ftell(&s->pb) + 5 < next){
101 len= get_be16(&s->pb);
102 if(len >= sizeof(tmp) || !len)
104 get_buffer(&s->pb, tmp, len);
107 type= get_byte(&s->pb);
109 d= av_int2dbl(get_be64(&s->pb));
111 len= get_be16(&s->pb);
112 if(len >= sizeof(tmp))
114 url_fskip(&s->pb, len);
119 d= av_int2dbl(get_be64(&s->pb));
123 if(!strcmp(tmp, "duration")){
124 s->duration = d*AV_TIME_BASE;
125 }else if(!strcmp(tmp, "videodatarate")){
126 }else if(!strcmp(tmp, "audiodatarate")){
129 url_fseek(&s->pb, next, SEEK_SET);
133 av_log(s, AV_LOG_ERROR, "skipping flv packet: type %d, size %d, flags %d\n", type, size, flags);
134 url_fseek(&s->pb, next, SEEK_SET);
138 /* now find stream */
139 for(i=0;i<s->nb_streams;i++) {
141 if (st->id == is_audio)
144 if(i == s->nb_streams){
145 st = av_new_stream(s, is_audio);
147 return AVERROR_NOMEM;
149 av_set_pts_info(st, 24, 1, 1000); /* 24 bit pts in ms */
150 st->codec->time_base= (AVRational){1,1000};
152 // av_log(NULL, AV_LOG_DEBUG, "%d %X %d \n", is_audio, flags, st->discard);
153 if( (st->discard >= AVDISCARD_NONKEY && !((flags >> 4)==1 || is_audio))
154 ||(st->discard >= AVDISCARD_BIDIR && ((flags >> 4)==3 && !is_audio))
155 || st->discard >= AVDISCARD_ALL
157 url_fseek(&s->pb, next, SEEK_SET);
161 av_add_index_entry(st, pos, pts, size, 0, AVINDEX_KEYFRAME);
166 if(st->codec->sample_rate == 0){
167 st->codec->codec_type = CODEC_TYPE_AUDIO;
168 st->codec->channels = (flags&1)+1;
169 if((flags >> 4) == 5)
170 st->codec->sample_rate= 8000;
172 st->codec->sample_rate = (44100<<((flags>>2)&3))>>3;
173 switch(flags >> 4){/* 0: uncompressed 1: ADPCM 2: mp3 5: Nellymoser 8kHz mono 6: Nellymoser*/
174 case 0: if (flags&2) st->codec->codec_id = CODEC_ID_PCM_S16BE;
175 else st->codec->codec_id = CODEC_ID_PCM_S8; break;
176 case 1: st->codec->codec_id = CODEC_ID_ADPCM_SWF; break;
177 case 2: st->codec->codec_id = CODEC_ID_MP3; break;
178 // this is not listed at FLV but at SWF, strange...
179 case 3: if (flags&2) st->codec->codec_id = CODEC_ID_PCM_S16LE;
180 else st->codec->codec_id = CODEC_ID_PCM_S8; break;
182 av_log(s, AV_LOG_INFO, "Unsupported audio codec (%x)\n", flags >> 4);
183 st->codec->codec_tag= (flags >> 4);
185 st->codec->bits_per_sample = (flags & 2) ? 16 : 8;
188 st->codec->codec_type = CODEC_TYPE_VIDEO;
190 case 2: st->codec->codec_id = CODEC_ID_FLV1; break;
191 case 3: st->codec->codec_id = CODEC_ID_FLASHSV; break;
193 st->codec->codec_id = CODEC_ID_VP6F;
194 get_byte(&s->pb); /* width and height adjustment */
198 av_log(s, AV_LOG_INFO, "Unsupported video codec (%x)\n", flags & 0xf);
199 st->codec->codec_tag= flags & 0xF;
203 ret= av_get_packet(&s->pb, pkt, size - 1);
207 /* note: we need to modify the packet size here to handle the last
211 pkt->stream_index = st->index;
213 if (is_audio || ((flags >> 4)==1))
214 pkt->flags |= PKT_FLAG_KEY;
219 static int flv_read_close(AVFormatContext *s)
224 static int flv_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
226 AVStream *st = s->streams[stream_index];
227 int index = av_index_search_timestamp(st, timestamp, flags);
230 url_fseek(&s->pb, st->index_entries[index].pos, SEEK_SET);
235 AVInputFormat flv_demuxer = {
245 .value = CODEC_ID_FLV1,