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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 #define VIDEO_FIFO_SIZE 512
26 typedef struct FLVFrame {
33 struct FLVFrame *next;
36 typedef struct FLVContext {
48 static const int sSampleRates[3][4] = {
49 {44100, 48000, 32000, 0},
50 {22050, 24000, 16000, 0},
51 {11025, 12000, 8000, 0},
54 static const int sBitRates[2][3][15] = {
55 { { 0, 32, 64, 96,128,160,192,224,256,288,320,352,384,416,448},
56 { 0, 32, 48, 56, 64, 80, 96,112,128,160,192,224,256,320,384},
57 { 0, 32, 40, 48, 56, 64, 80, 96,112,128,160,192,224,256,320}
59 { { 0, 32, 48, 56, 64, 80, 96,112,128,144,160,176,192,224,256},
60 { 0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96,112,128,144,160},
61 { 0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96,112,128,144,160}
65 static const int sSamplesPerFrame[3][3] =
72 static const int sBitsPerSlot[3] = {
78 static int mp3info(void *data, int *byteSize, int *samplesPerFrame, int *sampleRate, int *isMono )
80 uint8_t *dataTmp = (uint8_t *)data;
81 uint32_t header = ( (uint32_t)dataTmp[0] << 24 ) | ( (uint32_t)dataTmp[1] << 16 ) | ( (uint32_t)dataTmp[2] << 8 ) | (uint32_t)dataTmp[3];
82 int layerID = 3 - ((header >> 17) & 0x03);
83 int bitRateID = ((header >> 12) & 0x0f);
84 int sampleRateID = ((header >> 10) & 0x03);
86 int bitsPerSlot = sBitsPerSlot[layerID];
87 int isPadded = ((header >> 9) & 0x01);
89 if ( (( header >> 21 ) & 0x7ff) != 0x7ff ) {
94 // printf("Fatal error: mp3 data is not padded!\n");
98 *isMono = ((header >> 6) & 0x03) == 0x03;
100 if ( (header >> 19 ) & 0x01 ) {
102 *sampleRate = sSampleRates[0][sampleRateID];
103 bitRate = sBitRates[0][layerID][bitRateID] * 1000;
104 *samplesPerFrame = sSamplesPerFrame[0][layerID];
106 if ( (header >> 20) & 0x01 ) {
108 *sampleRate = sSampleRates[1][sampleRateID];
109 bitRate = sBitRates[1][layerID][bitRateID] * 1000;
110 *samplesPerFrame = sSamplesPerFrame[1][layerID];
113 *sampleRate = sSampleRates[2][sampleRateID];
114 bitRate = sBitRates[1][layerID][bitRateID] * 1000;
115 *samplesPerFrame = sSamplesPerFrame[2][layerID];
119 *byteSize = ( ( ( ( *samplesPerFrame * (bitRate / bitsPerSlot) ) / *sampleRate ) + isPadded ) );
122 #endif // CONFIG_MP3LAME
124 static void put_be24(ByteIOContext *pb, int value)
126 put_byte(pb, (value>>16) & 0xFF );
127 put_byte(pb, (value>> 8) & 0xFF );
128 put_byte(pb, (value>> 0) & 0xFF );
131 static int flv_write_header(AVFormatContext *s)
133 ByteIOContext *pb = &s->pb;
134 FLVContext *flv = s->priv_data;
146 put_byte(pb,0); // delayed write
150 for(i=0; i<s->nb_streams; i++){
151 AVCodecContext *enc = &s->streams[i]->codec;
152 av_set_pts_info(s->streams[i], 24, 1, 1000); /* 24 bit pts in ms */
153 if(enc->codec_tag == 5){
154 put_byte(pb,8); // message type
155 put_be24(pb,0); // include flags
156 put_be24(pb,0); // time stamp
157 put_be32(pb,0); // reserved
158 put_be32(pb,11); // size
166 static void InsertSorted(FLVContext *flv, FLVFrame *frame)
168 if ( !flv->frames ) {
171 FLVFrame *trav = flv->frames;
174 if ( trav->timestamp > frame->timestamp) {
192 static void DumpFrame(ByteIOContext *pb, FLVFrame *frame)
194 //av_log(NULL, AV_LOG_DEBUG, "T%02X S%d T%d R%d F%02X ... R%08X\n", frame->type, frame->size+1, frame->timestamp, 0, frame->flags, frame->size+1+11);
195 put_byte(pb,frame->type); // message type
196 put_be24(pb,frame->size+1); // include flags
197 put_be24(pb,frame->timestamp); // time stamp
198 put_be32(pb,frame->reserved); // reserved
199 put_byte(pb,frame->flags);
200 put_buffer(pb, frame->data, frame->size);
201 put_be32(pb,frame->size+1+11); // reserved
202 av_free(frame->data);
205 static void Dump(FLVContext *flv, ByteIOContext *pb, int count)
208 FLVFrame *trav = flv->frames;
214 for ( ; c >= count; c-- ) {
223 static int flv_write_trailer(AVFormatContext *s)
228 ByteIOContext *pb = &s->pb;
229 FLVContext *flv = s->priv_data;
233 file_size = url_ftell(pb);
234 flags |= flv->hasAudio ? 4 : 0;
235 flags |= flv->hasVideo ? 1 : 0;
236 url_fseek(pb, 4, SEEK_SET);
238 url_fseek(pb, file_size, SEEK_SET);
242 static int flv_write_packet(AVFormatContext *s, int stream_index,
243 const uint8_t *buf, int size, int64_t timestamp)
245 ByteIOContext *pb = &s->pb;
246 AVCodecContext *enc = &s->streams[stream_index]->codec;
247 FLVContext *flv = s->priv_data;
248 FLVFrame *frame = av_malloc(sizeof(FLVFrame));
252 frame->data = av_malloc(size);
253 frame->timestamp = timestamp;
254 frame->reserved= flv->reserved;
255 memcpy(frame->data,buf,size);
257 // av_log(s, AV_LOG_DEBUG, "type:%d pts: %lld size:%d\n", enc->codec_type, timestamp, size);
259 if (enc->codec_type == CODEC_TYPE_VIDEO) {
261 frame->flags = 2; // choose h263
262 frame->flags |= enc->coded_frame->key_frame ? 0x10 : 0x20; // add keyframe indicator
263 //frame->timestamp = ( ( flv->frameCount * (int64_t)FRAME_RATE_BASE * (int64_t)1000 ) / (int64_t)enc->frame_rate );
264 //printf("%08x %f %f\n",frame->timestamp,(double)enc->frame_rate/(double)FRAME_RATE_BASE,1000*(double)FRAME_RATE_BASE/(double)enc->frame_rate);
267 InsertSorted(flv,frame);
271 else if (enc->codec_type == CODEC_TYPE_AUDIO) {
272 int soundFormat = 0x02;
274 switch (enc->sample_rate) {
284 case 8000: //nellymoser only
292 if (enc->channels > 1) {
296 switch(enc->codec_id){
301 soundFormat |= enc->codec_tag<<4;
308 if ( flv->initDelay == -1 ) {
309 flv->initDelay = timestamp;
313 frame->flags = soundFormat;
315 // if ( flv->audioTime == -1 ) {
316 // flv->audioTime = ( ( ( flv->sampleCount - enc->delay ) * 8000 ) / flv->audioRate ) - flv->initDelay - 250;
317 // if ( flv->audioTime < 0 ) {
318 // flv->audioTime = 0;
322 #ifdef CONFIG_MP3LAME
323 if (enc->codec_id == CODEC_ID_MP3 ) {
324 int mp3FrameSize = 0;
325 int mp3SampleRate = 0;
327 int mp3SamplesPerFrame = 0;
329 /* copy out mp3 header from ring buffer */
330 if(!mp3info(buf,&mp3FrameSize,&mp3SamplesPerFrame,&mp3SampleRate,&mp3IsMono))
332 assert ( size == mp3FrameSize );
333 assert(enc->sample_rate == mp3SampleRate);
334 // assert(enc->frame_size == mp3SamplesPerFrame);
335 //av_log(NULL, AV_LOG_DEBUG, "sizes: %d %d\n", enc->frame_size, mp3SamplesPerFrame);
337 frame->timestamp = (1000*flv->sampleCount + enc->sample_rate/2)/(enc->sample_rate);
338 flv->sampleCount += mp3SamplesPerFrame;
342 // We got audio! Make sure we set this to the global flags on closure
344 InsertSorted(flv,frame);
348 put_flush_packet(pb);
352 static AVOutputFormat flv_oformat = {
355 "video/x-flashvideo",
358 #ifdef CONFIG_MP3LAME
360 #else // CONFIG_MP3LAME
362 #endif // CONFIG_MP3LAME
369 int flvenc_init(void)
371 av_register_output_format(&flv_oformat);