mirror of
https://git.ffmpeg.org/ffmpeg.git
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e928649b0b
fixes the random dts/pts during encoding asf preroll fix no more initial zero frames for b frame encoding mpeg-es dts during demuxing fixed .ffm timestamp scale fixed, ffm is still broken though Originally committed as revision 3168 to svn://svn.ffmpeg.org/ffmpeg/trunk
375 lines
10 KiB
C
375 lines
10 KiB
C
/*
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* FLV encoder.
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* Copyright (c) 2003 The FFmpeg Project.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "avformat.h"
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#undef NDEBUG
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#include <assert.h>
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#define VIDEO_FIFO_SIZE 512
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typedef struct FLVFrame {
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int type;
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int timestamp;
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int reserved;
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int flags;
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uint8_t *data;
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int size;
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struct FLVFrame *next;
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} FLVFrame;
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typedef struct FLVContext {
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int hasAudio;
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int hasVideo;
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int initDelay;
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int64_t sampleCount;
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int64_t frameCount;
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int reserved;
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FLVFrame *frames;
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} FLVContext;
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#ifdef CONFIG_MP3LAME
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static const int sSampleRates[3][4] = {
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{44100, 48000, 32000, 0},
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{22050, 24000, 16000, 0},
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{11025, 12000, 8000, 0},
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};
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static const int sBitRates[2][3][15] = {
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{ { 0, 32, 64, 96,128,160,192,224,256,288,320,352,384,416,448},
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{ 0, 32, 48, 56, 64, 80, 96,112,128,160,192,224,256,320,384},
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{ 0, 32, 40, 48, 56, 64, 80, 96,112,128,160,192,224,256,320}
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},
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{ { 0, 32, 48, 56, 64, 80, 96,112,128,144,160,176,192,224,256},
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{ 0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96,112,128,144,160},
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{ 0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96,112,128,144,160}
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},
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};
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static const int sSamplesPerFrame[3][3] =
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{
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{ 384, 1152, 1152 },
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{ 384, 1152, 576 },
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{ 384, 1152, 576 }
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};
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static const int sBitsPerSlot[3] = {
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32,
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8,
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8
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};
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static int mp3info(void *data, int *byteSize, int *samplesPerFrame, int *sampleRate, int *isMono )
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{
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uint8_t *dataTmp = (uint8_t *)data;
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uint32_t header = ( (uint32_t)dataTmp[0] << 24 ) | ( (uint32_t)dataTmp[1] << 16 ) | ( (uint32_t)dataTmp[2] << 8 ) | (uint32_t)dataTmp[3];
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int layerID = 3 - ((header >> 17) & 0x03);
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int bitRateID = ((header >> 12) & 0x0f);
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int sampleRateID = ((header >> 10) & 0x03);
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int bitRate = 0;
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int bitsPerSlot = sBitsPerSlot[layerID];
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int isPadded = ((header >> 9) & 0x01);
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if ( (( header >> 21 ) & 0x7ff) != 0x7ff ) {
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return 0;
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}
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if ( !isPadded ) {
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// printf("Fatal error: mp3 data is not padded!\n");
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// exit(0);
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}
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*isMono = ((header >> 6) & 0x03) == 0x03;
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if ( (header >> 19 ) & 0x01 ) {
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//MPEG1
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*sampleRate = sSampleRates[0][sampleRateID];
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bitRate = sBitRates[0][layerID][bitRateID] * 1000;
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*samplesPerFrame = sSamplesPerFrame[0][layerID];
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} else {
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if ( (header >> 20) & 0x01 ) {
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//MPEG2
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*sampleRate = sSampleRates[1][sampleRateID];
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bitRate = sBitRates[1][layerID][bitRateID] * 1000;
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*samplesPerFrame = sSamplesPerFrame[1][layerID];
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} else {
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//MPEG2.5
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*sampleRate = sSampleRates[2][sampleRateID];
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bitRate = sBitRates[1][layerID][bitRateID] * 1000;
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*samplesPerFrame = sSamplesPerFrame[2][layerID];
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}
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}
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*byteSize = ( ( ( ( *samplesPerFrame * (bitRate / bitsPerSlot) ) / *sampleRate ) + isPadded ) );
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return 1;
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}
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#endif // CONFIG_MP3LAME
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static void put_be24(ByteIOContext *pb, int value)
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{
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put_byte(pb, (value>>16) & 0xFF );
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put_byte(pb, (value>> 8) & 0xFF );
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put_byte(pb, (value>> 0) & 0xFF );
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}
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static int flv_write_header(AVFormatContext *s)
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{
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ByteIOContext *pb = &s->pb;
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FLVContext *flv = s->priv_data;
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int i;
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flv->hasAudio = 0;
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flv->hasVideo = 0;
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flv->initDelay = -1;
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flv->frames = 0;
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put_tag(pb,"FLV");
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put_byte(pb,1);
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put_byte(pb,0); // delayed write
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put_be32(pb,9);
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put_be32(pb,0);
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for(i=0; i<s->nb_streams; i++){
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AVCodecContext *enc = &s->streams[i]->codec;
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av_set_pts_info(s->streams[i], 24, 1, 1000); /* 24 bit pts in ms */
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if(enc->codec_tag == 5){
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put_byte(pb,8); // message type
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put_be24(pb,0); // include flags
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put_be24(pb,0); // time stamp
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put_be32(pb,0); // reserved
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put_be32(pb,11); // size
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flv->reserved=5;
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}
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}
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return 0;
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}
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static void InsertSorted(FLVContext *flv, FLVFrame *frame)
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{
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if ( !flv->frames ) {
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flv->frames = frame;
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} else {
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FLVFrame *trav = flv->frames;
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FLVFrame *prev = 0;
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for (;trav;) {
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if ( trav->timestamp > frame->timestamp) {
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frame->next = trav;
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if ( prev ) {
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prev->next = frame;
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} else {
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flv->frames = frame;
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}
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break;
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}
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prev = trav;
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trav = trav->next;
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}
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if ( !trav ) {
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prev->next = frame;
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}
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}
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}
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static void DumpFrame(ByteIOContext *pb, FLVFrame *frame)
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{
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//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);
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put_byte(pb,frame->type); // message type
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put_be24(pb,frame->size+1); // include flags
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put_be24(pb,frame->timestamp); // time stamp
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put_be32(pb,frame->reserved); // reserved
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put_byte(pb,frame->flags);
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put_buffer(pb, frame->data, frame->size);
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put_be32(pb,frame->size+1+11); // reserved
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av_free(frame->data);
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}
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static void Dump(FLVContext *flv, ByteIOContext *pb, int count)
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{
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int c=0;
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FLVFrame *trav = flv->frames;
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FLVFrame *prev = 0;
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for (;trav;c++) {
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trav = trav->next;
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}
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trav = flv->frames;
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for ( ; c >= count; c-- ) {
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DumpFrame(pb,trav);
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prev = trav;
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trav = trav->next;
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av_free(prev);
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}
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flv->frames = trav;
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}
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static int flv_write_trailer(AVFormatContext *s)
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{
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int64_t file_size;
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int flags = 0;
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ByteIOContext *pb = &s->pb;
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FLVContext *flv = s->priv_data;
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Dump(flv,pb,1);
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file_size = url_ftell(pb);
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flags |= flv->hasAudio ? 4 : 0;
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flags |= flv->hasVideo ? 1 : 0;
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url_fseek(pb, 4, SEEK_SET);
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put_byte(pb,flags);
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url_fseek(pb, file_size, SEEK_SET);
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return 0;
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}
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static int flv_write_packet(AVFormatContext *s, AVPacket *pkt)
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{
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ByteIOContext *pb = &s->pb;
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AVCodecContext *enc = &s->streams[pkt->stream_index]->codec;
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FLVContext *flv = s->priv_data;
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FLVFrame *frame = av_malloc(sizeof(FLVFrame));
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int size= pkt->size;
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uint8_t *buf= pkt->data;
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frame->next = 0;
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frame->size = size;
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frame->data = av_malloc(size);
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frame->timestamp = pkt->pts;
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frame->reserved= flv->reserved;
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memcpy(frame->data,buf,size);
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// av_log(s, AV_LOG_DEBUG, "type:%d pts: %lld size:%d\n", enc->codec_type, timestamp, size);
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if (enc->codec_type == CODEC_TYPE_VIDEO) {
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frame->type = 9;
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frame->flags = 2; // choose h263
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frame->flags |= pkt->flags & PKT_FLAG_KEY ? 0x10 : 0x20; // add keyframe indicator
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//frame->timestamp = ( ( flv->frameCount * (int64_t)FRAME_RATE_BASE * (int64_t)1000 ) / (int64_t)enc->frame_rate );
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//printf("%08x %f %f\n",frame->timestamp,(double)enc->frame_rate/(double)FRAME_RATE_BASE,1000*(double)FRAME_RATE_BASE/(double)enc->frame_rate);
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flv->hasVideo = 1;
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InsertSorted(flv,frame);
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flv->frameCount ++;
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}
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else if (enc->codec_type == CODEC_TYPE_AUDIO) {
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int soundFormat = 0x02;
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switch (enc->sample_rate) {
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case 44100:
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soundFormat |= 0x0C;
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break;
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case 22050:
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soundFormat |= 0x08;
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break;
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case 11025:
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soundFormat |= 0x04;
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break;
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case 8000: //nellymoser only
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case 5512: //not mp3
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soundFormat |= 0x00;
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break;
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default:
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assert(0);
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}
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if (enc->channels > 1) {
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soundFormat |= 0x01;
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}
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switch(enc->codec_id){
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case CODEC_ID_MP3:
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soundFormat |= 0x20;
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break;
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case 0:
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soundFormat |= enc->codec_tag<<4;
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break;
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default:
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assert(0);
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}
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assert(size);
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if ( flv->initDelay == -1 ) {
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flv->initDelay = pkt->pts;
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}
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frame->type = 8;
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frame->flags = soundFormat;
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// if ( flv->audioTime == -1 ) {
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// flv->audioTime = ( ( ( flv->sampleCount - enc->delay ) * 8000 ) / flv->audioRate ) - flv->initDelay - 250;
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// if ( flv->audioTime < 0 ) {
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// flv->audioTime = 0;
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// }
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// }
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#ifdef CONFIG_MP3LAME
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if (enc->codec_id == CODEC_ID_MP3 ) {
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int mp3FrameSize = 0;
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int mp3SampleRate = 0;
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int mp3IsMono = 0;
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int mp3SamplesPerFrame = 0;
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/* copy out mp3 header from ring buffer */
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if(!mp3info(buf,&mp3FrameSize,&mp3SamplesPerFrame,&mp3SampleRate,&mp3IsMono))
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assert(0);
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assert ( size == mp3FrameSize );
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assert(enc->sample_rate == mp3SampleRate);
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// assert(enc->frame_size == mp3SamplesPerFrame);
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//av_log(NULL, AV_LOG_DEBUG, "sizes: %d %d\n", enc->frame_size, mp3SamplesPerFrame);
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frame->timestamp = (1000*flv->sampleCount + enc->sample_rate/2)/(enc->sample_rate);
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flv->sampleCount += mp3SamplesPerFrame;
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}
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#endif
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// We got audio! Make sure we set this to the global flags on closure
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flv->hasAudio = 1;
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InsertSorted(flv,frame);
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}else
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assert(0);
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Dump(flv,pb,128);
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put_flush_packet(pb);
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return 0;
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}
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static AVOutputFormat flv_oformat = {
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"flv",
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"flv format",
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"video/x-flashvideo",
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"flv",
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sizeof(FLVContext),
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#ifdef CONFIG_MP3LAME
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CODEC_ID_MP3,
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#else // CONFIG_MP3LAME
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CODEC_ID_NONE,
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#endif // CONFIG_MP3LAME
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CODEC_ID_FLV1,
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flv_write_header,
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flv_write_packet,
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flv_write_trailer,
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};
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int flvenc_init(void)
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{
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av_register_output_format(&flv_oformat);
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return 0;
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}
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