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
29 static const AVCodecTag flv_video_codec_ids[] = {
30 {CODEC_ID_FLV1, FLV_CODECID_H263 },
31 {CODEC_ID_FLASHSV, FLV_CODECID_SCREEN},
32 {CODEC_ID_VP6F, FLV_CODECID_VP6 },
33 {CODEC_ID_VP6, FLV_CODECID_VP6 },
34 {CODEC_ID_H264, FLV_CODECID_H264 },
38 static const AVCodecTag flv_audio_codec_ids[] = {
39 {CODEC_ID_MP3, FLV_CODECID_MP3 >> FLV_AUDIO_CODECID_OFFSET},
40 {CODEC_ID_PCM_S8, FLV_CODECID_PCM >> FLV_AUDIO_CODECID_OFFSET},
41 {CODEC_ID_PCM_S16BE, FLV_CODECID_PCM >> FLV_AUDIO_CODECID_OFFSET},
42 {CODEC_ID_PCM_S16LE, FLV_CODECID_PCM_LE >> FLV_AUDIO_CODECID_OFFSET},
43 {CODEC_ID_ADPCM_SWF, FLV_CODECID_ADPCM >> FLV_AUDIO_CODECID_OFFSET},
44 {CODEC_ID_AAC, FLV_CODECID_AAC >> FLV_AUDIO_CODECID_OFFSET},
45 {CODEC_ID_NELLYMOSER, FLV_CODECID_NELLYMOSER >> FLV_AUDIO_CODECID_OFFSET},
49 typedef struct FLVContext {
51 offset_t duration_offset;
52 offset_t filesize_offset;
54 int delay; ///< first dts delay for AVC
57 static int get_audio_flags(AVCodecContext *enc){
58 int flags = (enc->bits_per_sample == 16) ? FLV_SAMPLESSIZE_16BIT : FLV_SAMPLESSIZE_8BIT;
60 if (enc->codec_id == CODEC_ID_AAC) // specs force these parameters
61 return FLV_CODECID_AAC | FLV_SAMPLERATE_44100HZ | FLV_SAMPLESSIZE_16BIT | FLV_STEREO;
63 switch (enc->sample_rate) {
65 flags |= FLV_SAMPLERATE_44100HZ;
68 flags |= FLV_SAMPLERATE_22050HZ;
71 flags |= FLV_SAMPLERATE_11025HZ;
73 case 8000: //nellymoser only
75 if(enc->codec_id != CODEC_ID_MP3){
76 flags |= FLV_SAMPLERATE_SPECIAL;
80 av_log(enc, AV_LOG_ERROR, "flv does not support that sample rate, choose from (44100, 22050, 11025).\n");
85 if (enc->channels > 1) {
89 switch(enc->codec_id){
91 flags |= FLV_CODECID_MP3 | FLV_SAMPLESSIZE_16BIT;
94 flags |= FLV_CODECID_PCM | FLV_SAMPLESSIZE_8BIT;
96 case CODEC_ID_PCM_S16BE:
97 flags |= FLV_CODECID_PCM | FLV_SAMPLESSIZE_16BIT;
99 case CODEC_ID_PCM_S16LE:
100 flags |= FLV_CODECID_PCM_LE | FLV_SAMPLESSIZE_16BIT;
102 case CODEC_ID_ADPCM_SWF:
103 flags |= FLV_CODECID_ADPCM | FLV_SAMPLESSIZE_16BIT;
105 case CODEC_ID_NELLYMOSER:
106 flags |= FLV_CODECID_NELLYMOSER | FLV_SAMPLESSIZE_16BIT;
109 flags |= enc->codec_tag<<4;
112 av_log(enc, AV_LOG_ERROR, "codec not compatible with flv\n");
119 static void put_amf_string(ByteIOContext *pb, const char *str)
121 size_t len = strlen(str);
123 put_buffer(pb, str, len);
126 static void put_amf_double(ByteIOContext *pb, double d)
128 put_byte(pb, AMF_DATA_TYPE_NUMBER);
129 put_be64(pb, av_dbl2int(d));
132 static void put_amf_bool(ByteIOContext *pb, int b) {
133 put_byte(pb, AMF_DATA_TYPE_BOOL);
137 static int flv_write_header(AVFormatContext *s)
139 ByteIOContext *pb = s->pb;
140 FLVContext *flv = s->priv_data;
141 AVCodecContext *audio_enc = NULL, *video_enc = NULL;
143 double framerate = 0.0;
144 int metadata_size_pos, data_size;
146 for(i=0; i<s->nb_streams; i++){
147 AVCodecContext *enc = s->streams[i]->codec;
148 if (enc->codec_type == CODEC_TYPE_VIDEO) {
149 if (s->streams[i]->r_frame_rate.den && s->streams[i]->r_frame_rate.num) {
150 framerate = av_q2d(s->streams[i]->r_frame_rate);
152 framerate = 1/av_q2d(s->streams[i]->codec->time_base);
155 if(enc->codec_tag == 0) {
156 av_log(enc, AV_LOG_ERROR, "video codec not compatible with flv\n");
161 if(get_audio_flags(enc)<0)
164 av_set_pts_info(s->streams[i], 32, 1, 1000); /* 32 bit pts in ms */
168 put_byte(pb, FLV_HEADER_FLAG_HASAUDIO * !!audio_enc
169 + FLV_HEADER_FLAG_HASVIDEO * !!video_enc);
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*!!video_enc + 4*!!audio_enc + 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, video_enc->width);
209 put_amf_string(pb, "height");
210 put_amf_double(pb, video_enc->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, video_enc->codec_tag);
223 put_amf_string(pb, "audiosamplerate");
224 put_amf_double(pb, audio_enc->sample_rate);
226 put_amf_string(pb, "audiosamplesize");
227 put_amf_double(pb, audio_enc->codec_id == CODEC_ID_PCM_S8 ? 8 : 16);
229 put_amf_string(pb, "stereo");
230 put_amf_bool(pb, audio_enc->channels == 2);
232 put_amf_string(pb, "audiocodecid");
233 put_amf_double(pb, audio_enc->codec_tag);
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);
250 for (i = 0; i < s->nb_streams; i++) {
251 AVCodecContext *enc = s->streams[i]->codec;
252 if (enc->codec_id == CODEC_ID_AAC || enc->codec_id == CODEC_ID_H264) {
254 put_byte(pb, enc->codec_type == CODEC_TYPE_VIDEO ?
255 FLV_TAG_TYPE_VIDEO : FLV_TAG_TYPE_AUDIO);
256 put_be24(pb, 0); // size patched later
257 put_be24(pb, 0); // ts
258 put_byte(pb, 0); // ts ext
259 put_be24(pb, 0); // streamid
261 if (enc->codec_id == CODEC_ID_AAC) {
262 put_byte(pb, get_audio_flags(enc));
263 put_byte(pb, 0); // AAC sequence header
264 put_buffer(pb, enc->extradata, enc->extradata_size);
266 put_byte(pb, enc->codec_tag | FLV_FRAME_KEY); // flags
267 put_byte(pb, 0); // AVC sequence header
268 put_be24(pb, 0); // composition time
269 ff_isom_write_avcc(pb, enc->extradata, enc->extradata_size);
271 data_size = url_ftell(pb) - pos;
272 url_fseek(pb, -data_size - 10, SEEK_CUR);
273 put_be24(pb, data_size);
274 url_fseek(pb, data_size + 10 - 3, SEEK_CUR);
275 put_be32(pb, data_size + 11); // previous tag size
282 static int flv_write_trailer(AVFormatContext *s)
286 ByteIOContext *pb = s->pb;
287 FLVContext *flv = s->priv_data;
289 file_size = url_ftell(pb);
291 /* update informations */
292 url_fseek(pb, flv->duration_offset, SEEK_SET);
293 put_amf_double(pb, flv->duration / (double)1000);
294 url_fseek(pb, flv->filesize_offset, SEEK_SET);
295 put_amf_double(pb, file_size);
297 url_fseek(pb, file_size, SEEK_SET);
301 static int flv_write_packet(AVFormatContext *s, AVPacket *pkt)
303 ByteIOContext *pb = s->pb;
304 AVCodecContext *enc = s->streams[pkt->stream_index]->codec;
305 FLVContext *flv = s->priv_data;
308 int flags, flags_size;
310 // av_log(s, AV_LOG_DEBUG, "type:%d pts: %"PRId64" size:%d\n", enc->codec_type, timestamp, size);
312 if(enc->codec_id == CODEC_ID_VP6 || enc->codec_id == CODEC_ID_VP6F ||
313 enc->codec_id == CODEC_ID_AAC)
315 else if(enc->codec_id == CODEC_ID_H264)
320 if (enc->codec_type == CODEC_TYPE_VIDEO) {
321 put_byte(pb, FLV_TAG_TYPE_VIDEO);
323 flags = enc->codec_tag;
325 av_log(enc, AV_LOG_ERROR, "video codec %X not compatible with flv\n",enc->codec_id);
329 flags |= pkt->flags & PKT_FLAG_KEY ? FLV_FRAME_KEY : FLV_FRAME_INTER;
331 assert(enc->codec_type == CODEC_TYPE_AUDIO);
332 flags = get_audio_flags(enc);
336 put_byte(pb, FLV_TAG_TYPE_AUDIO);
339 if (enc->codec_id == CODEC_ID_H264 &&
340 /* check if extradata looks like mp4 formated */
341 enc->extradata_size > 0 && *(uint8_t*)enc->extradata != 1) {
342 if (ff_avc_parse_nal_units(pkt->data, &pkt->data, &pkt->size) < 0)
346 /* cast needed to get negative value */
347 if (!flv->delay && (int32_t)pkt->dts < 0)
348 flv->delay = -(int32_t)pkt->dts;
351 ts = pkt->dts + flv->delay; // add delay to force positive dts
352 put_be24(pb,size + flags_size);
354 put_byte(pb,ts >> 24);
355 put_be24(pb,flv->reserved);
357 if (enc->codec_id == CODEC_ID_VP6)
359 if (enc->codec_id == CODEC_ID_VP6F)
360 put_byte(pb, enc->extradata_size ? enc->extradata[0] : 0);
361 else if (enc->codec_id == CODEC_ID_AAC)
362 put_byte(pb,1); // AAC raw
363 else if (enc->codec_id == CODEC_ID_H264) {
364 put_byte(pb,1); // AVC NALU
365 put_be24(pb,pkt->pts - (int32_t)pkt->dts);
367 put_buffer(pb, pkt->data, size);
368 put_be32(pb,size+flags_size+11); // previous tag size
369 flv->duration = FFMAX(flv->duration, pkt->pts + flv->delay + pkt->duration);
371 put_flush_packet(pb);
375 AVOutputFormat flv_muxer = {
381 #ifdef CONFIG_LIBMP3LAME
383 #else // CONFIG_LIBMP3LAME
385 #endif // CONFIG_LIBMP3LAME
390 .codec_tag= (const AVCodecTag*[]){flv_video_codec_ids, flv_audio_codec_ids, 0},
391 .flags= AVFMT_GLOBALHEADER,