3 * Copyright (c) 2003 The FFmpeg Project.
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
28 static const AVCodecTag flv_video_codec_ids[] = {
29 {CODEC_ID_FLV1, FLV_CODECID_H263 },
30 {CODEC_ID_FLASHSV, FLV_CODECID_SCREEN},
31 {CODEC_ID_VP6F, FLV_CODECID_VP6 },
32 {CODEC_ID_VP6, FLV_CODECID_VP6 },
36 static const AVCodecTag flv_audio_codec_ids[] = {
37 {CODEC_ID_MP3, FLV_CODECID_MP3 >> FLV_AUDIO_CODECID_OFFSET},
38 {CODEC_ID_PCM_S8, FLV_CODECID_PCM_BE >> FLV_AUDIO_CODECID_OFFSET},
39 {CODEC_ID_PCM_S16BE, FLV_CODECID_PCM_BE >> FLV_AUDIO_CODECID_OFFSET},
40 {CODEC_ID_PCM_S16LE, FLV_CODECID_PCM_LE >> FLV_AUDIO_CODECID_OFFSET},
41 {CODEC_ID_ADPCM_SWF, FLV_CODECID_ADPCM >> FLV_AUDIO_CODECID_OFFSET},
45 typedef struct FLVContext {
49 offset_t duration_offset;
50 offset_t filesize_offset;
54 static int get_audio_flags(AVCodecContext *enc){
55 int flags = (enc->bits_per_sample == 16) ? FLV_SAMPLESSIZE_16BIT : FLV_SAMPLESSIZE_8BIT;
57 switch (enc->sample_rate) {
59 flags |= FLV_SAMPLERATE_44100HZ;
62 flags |= FLV_SAMPLERATE_22050HZ;
65 flags |= FLV_SAMPLERATE_11025HZ;
67 case 8000: //nellymoser only
69 flags |= FLV_SAMPLERATE_SPECIAL;
72 av_log(enc, AV_LOG_ERROR, "flv doesnt support that sample rate, choose from (44100, 22050, 11025)\n");
76 if (enc->channels > 1) {
80 switch(enc->codec_id){
82 flags |= FLV_CODECID_MP3 | FLV_SAMPLESSIZE_16BIT;
85 flags |= FLV_CODECID_PCM_BE | FLV_SAMPLESSIZE_8BIT;
87 case CODEC_ID_PCM_S16BE:
88 flags |= FLV_CODECID_PCM_BE | FLV_SAMPLESSIZE_16BIT;
90 case CODEC_ID_PCM_S16LE:
91 flags |= FLV_CODECID_PCM_LE | FLV_SAMPLESSIZE_16BIT;
93 case CODEC_ID_ADPCM_SWF:
94 flags |= FLV_CODECID_ADPCM | FLV_SAMPLESSIZE_16BIT;
97 flags |= enc->codec_tag<<4;
100 av_log(enc, AV_LOG_ERROR, "codec not compatible with flv\n");
107 static void put_amf_string(ByteIOContext *pb, const char *str)
109 size_t len = strlen(str);
111 put_buffer(pb, str, len);
114 static void put_amf_double(ByteIOContext *pb, double d)
116 put_byte(pb, AMF_DATA_TYPE_NUMBER);
117 put_be64(pb, av_dbl2int(d));
120 static void put_amf_bool(ByteIOContext *pb, int b) {
121 put_byte(pb, AMF_DATA_TYPE_BOOL);
125 static int flv_write_header(AVFormatContext *s)
127 ByteIOContext *pb = &s->pb;
128 FLVContext *flv = s->priv_data;
129 int i, width, height, samplerate, samplesize, channels, audiocodecid, videocodecid;
130 double framerate = 0.0;
131 int metadata_size_pos, data_size;
136 for(i=0; i<s->nb_streams; i++){
137 AVCodecContext *enc = s->streams[i]->codec;
138 if (enc->codec_type == CODEC_TYPE_VIDEO) {
140 height = enc->height;
141 if (s->streams[i]->r_frame_rate.den && s->streams[i]->r_frame_rate.num) {
142 framerate = av_q2d(s->streams[i]->r_frame_rate);
144 framerate = 1/av_q2d(s->streams[i]->codec->time_base);
148 videocodecid = enc->codec_tag;
149 if(videocodecid == 0) {
150 av_log(enc, AV_LOG_ERROR, "video codec not compatible with flv\n");
155 samplerate = enc->sample_rate;
156 channels = enc->channels;
158 audiocodecid = enc->codec_tag;
159 samplesize = (enc->codec_id == CODEC_ID_PCM_S8) ? 8 : 16;
161 if(get_audio_flags(enc)<0)
164 av_set_pts_info(s->streams[i], 24, 1, 1000); /* 24 bit pts in ms */
168 put_byte(pb, FLV_HEADER_FLAG_HASAUDIO * flv->hasAudio
169 + FLV_HEADER_FLAG_HASVIDEO * flv->hasVideo);
173 for(i=0; i<s->nb_streams; i++){
174 if(s->streams[i]->codec->codec_tag == 5){
175 put_byte(pb,8); // message type
176 put_be24(pb,0); // include flags
177 put_be24(pb,0); // time stamp
178 put_be32(pb,0); // reserved
179 put_be32(pb,11); // size
185 put_byte(pb, 18); // tag type META
186 metadata_size_pos= url_ftell(pb);
187 put_be24(pb, 0); // size of data part (sum of all parts below)
188 put_be24(pb, 0); // time stamp
189 put_be32(pb, 0); // reserved
191 /* now data of data_size size */
193 /* first event name as a string */
194 put_byte(pb, AMF_DATA_TYPE_STRING);
195 put_amf_string(pb, "onMetaData"); // 12 bytes
197 /* mixed array (hash) with size and string/type/data tuples */
198 put_byte(pb, AMF_DATA_TYPE_MIXEDARRAY);
199 put_be32(pb, 5*flv->hasVideo + 4*flv->hasAudio + 2); // +2 for duration and file size
201 put_amf_string(pb, "duration");
202 flv->duration_offset= url_ftell(pb);
203 put_amf_double(pb, 0); // delayed write
206 put_amf_string(pb, "width");
207 put_amf_double(pb, width);
209 put_amf_string(pb, "height");
210 put_amf_double(pb, height);
212 put_amf_string(pb, "videodatarate");
213 put_amf_double(pb, s->bit_rate / 1024.0);
215 put_amf_string(pb, "framerate");
216 put_amf_double(pb, framerate);
218 put_amf_string(pb, "videocodecid");
219 put_amf_double(pb, videocodecid);
223 put_amf_string(pb, "audiosamplerate");
224 put_amf_double(pb, samplerate);
226 put_amf_string(pb, "audiosamplesize");
227 put_amf_double(pb, samplesize);
229 put_amf_string(pb, "stereo");
230 put_amf_bool(pb, (channels == 2));
232 put_amf_string(pb, "audiocodecid");
233 put_amf_double(pb, audiocodecid);
236 put_amf_string(pb, "filesize");
237 flv->filesize_offset= url_ftell(pb);
238 put_amf_double(pb, 0); // delayed write
240 put_amf_string(pb, "");
241 put_byte(pb, AMF_END_OF_OBJECT);
243 /* write total size of tag */
244 data_size= url_ftell(pb) - metadata_size_pos - 10;
245 url_fseek(pb, metadata_size_pos, SEEK_SET);
246 put_be24(pb, data_size);
247 url_fseek(pb, data_size + 10 - 3, SEEK_CUR);
248 put_be32(pb, data_size + 11);
253 static int flv_write_trailer(AVFormatContext *s)
257 ByteIOContext *pb = &s->pb;
258 FLVContext *flv = s->priv_data;
260 file_size = url_ftell(pb);
262 /* update informations */
263 url_fseek(pb, flv->duration_offset, SEEK_SET);
264 put_amf_double(pb, flv->duration / (double)1000);
265 url_fseek(pb, flv->filesize_offset, SEEK_SET);
266 put_amf_double(pb, file_size);
268 url_fseek(pb, file_size, SEEK_SET);
272 static int flv_write_packet(AVFormatContext *s, AVPacket *pkt)
274 ByteIOContext *pb = &s->pb;
275 AVCodecContext *enc = s->streams[pkt->stream_index]->codec;
276 FLVContext *flv = s->priv_data;
280 // av_log(s, AV_LOG_DEBUG, "type:%d pts: %"PRId64" size:%d\n", enc->codec_type, timestamp, size);
282 if (enc->codec_type == CODEC_TYPE_VIDEO) {
283 put_byte(pb, FLV_TAG_TYPE_VIDEO);
285 flags = enc->codec_tag;
287 av_log(enc, AV_LOG_ERROR, "video codec %X not compatible with flv\n",enc->codec_id);
291 flags |= pkt->flags & PKT_FLAG_KEY ? FLV_FRAME_KEY : FLV_FRAME_INTER;
293 assert(enc->codec_type == CODEC_TYPE_AUDIO);
294 flags = get_audio_flags(enc);
298 put_byte(pb, FLV_TAG_TYPE_AUDIO);
301 if ((enc->codec_id == CODEC_ID_VP6) || (enc->codec_id == CODEC_ID_VP6F))
302 put_be24(pb,size+2); // include the extra byte needed for VP6 in flv and flags
304 put_be24(pb,size+1); // include flags
305 put_be24(pb,pkt->pts);
306 put_be32(pb,flv->reserved);
308 if (enc->codec_id == CODEC_ID_VP6)
310 if (enc->codec_id == CODEC_ID_VP6F)
311 put_byte(pb, enc->extradata_size ? enc->extradata[0] : 0);
312 put_buffer(pb, pkt->data, size);
313 put_be32(pb,size+1+11); // previous tag size
314 flv->duration = pkt->pts + pkt->duration;
316 put_flush_packet(pb);
320 AVOutputFormat flv_muxer = {
326 #ifdef CONFIG_LIBMP3LAME
328 #else // CONFIG_LIBMP3LAME
330 #endif // CONFIG_LIBMP3LAME
335 .codec_tag= (const AVCodecTag*[]){flv_video_codec_ids, flv_audio_codec_ids, 0},