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 >> FLV_AUDIO_CODECID_OFFSET},
39 {CODEC_ID_PCM_S16BE, FLV_CODECID_PCM >> 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},
42 {CODEC_ID_NELLYMOSER, FLV_CODECID_NELLYMOSER >> FLV_AUDIO_CODECID_OFFSET},
46 typedef struct FLVContext {
50 offset_t duration_offset;
51 offset_t filesize_offset;
55 static int get_audio_flags(AVCodecContext *enc){
56 int flags = (enc->bits_per_sample == 16) ? FLV_SAMPLESSIZE_16BIT : FLV_SAMPLESSIZE_8BIT;
58 switch (enc->sample_rate) {
60 flags |= FLV_SAMPLERATE_44100HZ;
63 flags |= FLV_SAMPLERATE_22050HZ;
66 flags |= FLV_SAMPLERATE_11025HZ;
68 case 8000: //nellymoser only
70 if(enc->codec_id != CODEC_ID_MP3){
71 flags |= FLV_SAMPLERATE_SPECIAL;
75 av_log(enc, AV_LOG_ERROR, "flv does not support that sample rate, choose from (44100, 22050, 11025).\n");
79 if (enc->channels > 1) {
83 switch(enc->codec_id){
85 flags |= FLV_CODECID_MP3 | FLV_SAMPLESSIZE_16BIT;
88 flags |= FLV_CODECID_PCM | FLV_SAMPLESSIZE_8BIT;
90 case CODEC_ID_PCM_S16BE:
91 flags |= FLV_CODECID_PCM | FLV_SAMPLESSIZE_16BIT;
93 case CODEC_ID_PCM_S16LE:
94 flags |= FLV_CODECID_PCM_LE | FLV_SAMPLESSIZE_16BIT;
96 case CODEC_ID_ADPCM_SWF:
97 flags |= FLV_CODECID_ADPCM | FLV_SAMPLESSIZE_16BIT;
99 case CODEC_ID_NELLYMOSER:
100 flags |= FLV_CODECID_NELLYMOSER | FLV_SAMPLESSIZE_16BIT;
103 flags |= enc->codec_tag<<4;
106 av_log(enc, AV_LOG_ERROR, "codec not compatible with flv\n");
113 static void put_amf_string(ByteIOContext *pb, const char *str)
115 size_t len = strlen(str);
117 put_buffer(pb, str, len);
120 static void put_amf_double(ByteIOContext *pb, double d)
122 put_byte(pb, AMF_DATA_TYPE_NUMBER);
123 put_be64(pb, av_dbl2int(d));
126 static void put_amf_bool(ByteIOContext *pb, int b) {
127 put_byte(pb, AMF_DATA_TYPE_BOOL);
131 static int flv_write_header(AVFormatContext *s)
133 ByteIOContext *pb = s->pb;
134 FLVContext *flv = s->priv_data;
135 int i, width, height, samplerate, samplesize, channels, audiocodecid, videocodecid;
136 double framerate = 0.0;
137 int metadata_size_pos, data_size;
142 for(i=0; i<s->nb_streams; i++){
143 AVCodecContext *enc = s->streams[i]->codec;
144 if (enc->codec_type == CODEC_TYPE_VIDEO) {
146 height = enc->height;
147 if (s->streams[i]->r_frame_rate.den && s->streams[i]->r_frame_rate.num) {
148 framerate = av_q2d(s->streams[i]->r_frame_rate);
150 framerate = 1/av_q2d(s->streams[i]->codec->time_base);
154 videocodecid = enc->codec_tag;
155 if(videocodecid == 0) {
156 av_log(enc, AV_LOG_ERROR, "video codec not compatible with flv\n");
161 samplerate = enc->sample_rate;
162 channels = enc->channels;
164 audiocodecid = enc->codec_tag;
165 samplesize = (enc->codec_id == CODEC_ID_PCM_S8) ? 8 : 16;
167 if(get_audio_flags(enc)<0)
170 av_set_pts_info(s->streams[i], 32, 1, 1000); /* 32 bit pts in ms */
174 put_byte(pb, FLV_HEADER_FLAG_HASAUDIO * flv->hasAudio
175 + FLV_HEADER_FLAG_HASVIDEO * flv->hasVideo);
179 for(i=0; i<s->nb_streams; i++){
180 if(s->streams[i]->codec->codec_tag == 5){
181 put_byte(pb,8); // message type
182 put_be24(pb,0); // include flags
183 put_be24(pb,0); // time stamp
184 put_be32(pb,0); // reserved
185 put_be32(pb,11); // size
191 put_byte(pb, 18); // tag type META
192 metadata_size_pos= url_ftell(pb);
193 put_be24(pb, 0); // size of data part (sum of all parts below)
194 put_be24(pb, 0); // time stamp
195 put_be32(pb, 0); // reserved
197 /* now data of data_size size */
199 /* first event name as a string */
200 put_byte(pb, AMF_DATA_TYPE_STRING);
201 put_amf_string(pb, "onMetaData"); // 12 bytes
203 /* mixed array (hash) with size and string/type/data tuples */
204 put_byte(pb, AMF_DATA_TYPE_MIXEDARRAY);
205 put_be32(pb, 5*flv->hasVideo + 4*flv->hasAudio + 2); // +2 for duration and file size
207 put_amf_string(pb, "duration");
208 flv->duration_offset= url_ftell(pb);
209 put_amf_double(pb, 0); // delayed write
212 put_amf_string(pb, "width");
213 put_amf_double(pb, width);
215 put_amf_string(pb, "height");
216 put_amf_double(pb, height);
218 put_amf_string(pb, "videodatarate");
219 put_amf_double(pb, s->bit_rate / 1024.0);
221 put_amf_string(pb, "framerate");
222 put_amf_double(pb, framerate);
224 put_amf_string(pb, "videocodecid");
225 put_amf_double(pb, videocodecid);
229 put_amf_string(pb, "audiosamplerate");
230 put_amf_double(pb, samplerate);
232 put_amf_string(pb, "audiosamplesize");
233 put_amf_double(pb, samplesize);
235 put_amf_string(pb, "stereo");
236 put_amf_bool(pb, (channels == 2));
238 put_amf_string(pb, "audiocodecid");
239 put_amf_double(pb, audiocodecid);
242 put_amf_string(pb, "filesize");
243 flv->filesize_offset= url_ftell(pb);
244 put_amf_double(pb, 0); // delayed write
246 put_amf_string(pb, "");
247 put_byte(pb, AMF_END_OF_OBJECT);
249 /* write total size of tag */
250 data_size= url_ftell(pb) - metadata_size_pos - 10;
251 url_fseek(pb, metadata_size_pos, SEEK_SET);
252 put_be24(pb, data_size);
253 url_fseek(pb, data_size + 10 - 3, SEEK_CUR);
254 put_be32(pb, data_size + 11);
259 static int flv_write_trailer(AVFormatContext *s)
263 ByteIOContext *pb = s->pb;
264 FLVContext *flv = s->priv_data;
266 file_size = url_ftell(pb);
268 /* update informations */
269 url_fseek(pb, flv->duration_offset, SEEK_SET);
270 put_amf_double(pb, flv->duration / (double)1000);
271 url_fseek(pb, flv->filesize_offset, SEEK_SET);
272 put_amf_double(pb, file_size);
274 url_fseek(pb, file_size, SEEK_SET);
278 static int flv_write_packet(AVFormatContext *s, AVPacket *pkt)
280 ByteIOContext *pb = s->pb;
281 AVCodecContext *enc = s->streams[pkt->stream_index]->codec;
282 FLVContext *flv = s->priv_data;
284 int flags, flags_size;
286 // av_log(s, AV_LOG_DEBUG, "type:%d pts: %"PRId64" size:%d\n", enc->codec_type, timestamp, size);
288 if(enc->codec_id == CODEC_ID_VP6 || enc->codec_id == CODEC_ID_VP6F)
293 if (enc->codec_type == CODEC_TYPE_VIDEO) {
294 put_byte(pb, FLV_TAG_TYPE_VIDEO);
296 flags = enc->codec_tag;
298 av_log(enc, AV_LOG_ERROR, "video codec %X not compatible with flv\n",enc->codec_id);
302 flags |= pkt->flags & PKT_FLAG_KEY ? FLV_FRAME_KEY : FLV_FRAME_INTER;
304 assert(enc->codec_type == CODEC_TYPE_AUDIO);
305 flags = get_audio_flags(enc);
309 put_byte(pb, FLV_TAG_TYPE_AUDIO);
312 put_be24(pb,size + flags_size);
313 put_be24(pb,pkt->pts);
314 put_byte(pb,pkt->pts >> 24);
315 put_be24(pb,flv->reserved);
317 if (enc->codec_id == CODEC_ID_VP6)
319 if (enc->codec_id == CODEC_ID_VP6F)
320 put_byte(pb, enc->extradata_size ? enc->extradata[0] : 0);
321 put_buffer(pb, pkt->data, size);
322 put_be32(pb,size+flags_size+11); // previous tag size
323 flv->duration = pkt->pts + pkt->duration;
325 put_flush_packet(pb);
329 AVOutputFormat flv_muxer = {
335 #ifdef CONFIG_LIBMP3LAME
337 #else // CONFIG_LIBMP3LAME
339 #endif // CONFIG_LIBMP3LAME
344 .codec_tag= (const AVCodecTag*[]){flv_video_codec_ids, flv_audio_codec_ids, 0},