+++ /dev/null
-/*
- * FLV encoder.
- * Copyright (c) 2003 The FFmpeg Project.
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-#include "avformat.h"
-
-#define VIDEO_FIFO_SIZE 512
-
-typedef struct FLVFrame {
- int type;
- int timestamp;
- int flags;
- uint8_t *data;
- int size;
- struct FLVFrame *next;
-} FLVFrame;
-
-typedef struct FLVContext {
- int hasAudio;
- int hasVideo;
-#ifdef CONFIG_MP3LAME
- int audioTime;
- int audioInPos;
- int audioOutPos;
- int audioSize;
- int audioRate;
- int initDelay;
- int soundDelay;
- uint8_t *audioFifo;
- int64_t sampleCount;
-#endif // CONFIG_MP3LAME
- int64_t frameCount;
- FLVFrame *frames;
-} FLVContext;
-
-
-#ifdef CONFIG_MP3LAME
-
-#define AUDIO_FIFO_SIZE 65536
-
-static const int sSampleRates[3][4] = {
- {44100, 48000, 32000, 0},
- {22050, 24000, 16000, 0},
- {11025, 12000, 8000, 0},
-};
-
-static const int sBitRates[2][3][15] = {
- { { 0, 32, 64, 96,128,160,192,224,256,288,320,352,384,416,448},
- { 0, 32, 48, 56, 64, 80, 96,112,128,160,192,224,256,320,384},
- { 0, 32, 40, 48, 56, 64, 80, 96,112,128,160,192,224,256,320}
- },
- { { 0, 32, 48, 56, 64, 80, 96,112,128,144,160,176,192,224,256},
- { 0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96,112,128,144,160},
- { 0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96,112,128,144,160}
- },
-};
-
-static const int sSamplesPerFrame[3][3] =
-{
- { 384, 1152, 1152 },
- { 384, 1152, 576 },
- { 384, 1152, 576 }
-};
-
-static const int sBitsPerSlot[3] = {
- 32,
- 8,
- 8
-};
-
-static int mp3info(void *data, int *byteSize, int *samplesPerFrame, int *sampleRate, int *isMono )
-{
- uint8_t *dataTmp = (uint8_t *)data;
- uint32_t header = ( (uint32_t)dataTmp[0] << 24 ) | ( (uint32_t)dataTmp[1] << 16 ) | ( (uint32_t)dataTmp[2] << 8 ) | (uint32_t)dataTmp[3];
- int layerID = 3 - ((header >> 17) & 0x03);
- int bitRateID = ((header >> 12) & 0x0f);
- int sampleRateID = ((header >> 10) & 0x03);
- int bitRate = 0;
- int bitsPerSlot = sBitsPerSlot[layerID];
- int isPadded = ((header >> 9) & 0x01);
-
- if ( (( header >> 21 ) & 0x7ff) != 0x7ff ) {
- return 0;
- }
-
- if ( !isPadded ) {
- printf("Fatal error: mp3 data is not padded!\n");
- exit(0);
- }
-
- *isMono = ((header >> 6) & 0x03) == 0x03;
-
- if ( (header >> 19 ) & 0x01 ) {
- *sampleRate = sSampleRates[0][sampleRateID];
- bitRate = sBitRates[0][layerID][bitRateID] * 1000;
- *samplesPerFrame = sSamplesPerFrame[0][layerID];
-
- } else {
- if ( (header >> 20) & 0x01 ) {
- *sampleRate = sSampleRates[1][sampleRateID];
- bitRate = sBitRates[1][layerID][bitRateID] * 1000;
- *samplesPerFrame = sSamplesPerFrame[1][layerID];
- } else {
- *sampleRate = sSampleRates[2][sampleRateID];
- bitRate = sBitRates[1][layerID][bitRateID] * 1000;
- *samplesPerFrame = sSamplesPerFrame[2][layerID];
- }
- }
-
- *byteSize = ( ( ( ( *samplesPerFrame * (bitRate / bitsPerSlot) ) / *sampleRate ) + isPadded ) * bitsPerSlot);
-
- return 1;
-}
-#endif // CONFIG_MP3LAME
-
-static int flv_write_header(AVFormatContext *s)
-{
- ByteIOContext *pb = &s->pb;
- FLVContext *flv = s->priv_data;
-
- av_set_pts_info(s, 24, 1, 1000); /* 24 bit pts in ms */
-
- flv->hasAudio = 0;
- flv->hasVideo = 0;
-
-#ifdef CONFIG_MP3LAME
- flv->audioTime = -1;
- flv->audioFifo = av_malloc(AUDIO_FIFO_SIZE);
- flv->audioInPos = 0;
- flv->audioOutPos = 0;
- flv->audioSize = 0;
- flv->audioRate = 44100;
- flv->initDelay = -1;
- flv->soundDelay = 0;
-#endif // CONFIG_MP3LAME
-
- flv->frames = 0;
-
- put_tag(pb,"FLV");
- put_byte(pb,1);
- put_byte(pb,0); // delayed write
- put_be32(pb,9);
- put_be32(pb,0);
-
- return 0;
-}
-
-static void put_be24(ByteIOContext *pb, int value)
-{
- put_byte(pb, (value>>16) & 0xFF );
- put_byte(pb, (value>> 8) & 0xFF );
- put_byte(pb, (value>> 0) & 0xFF );
-}
-
-static void InsertSorted(FLVContext *flv, FLVFrame *frame)
-{
- if ( !flv->frames ) {
- flv->frames = frame;
- } else {
- FLVFrame *trav = flv->frames;
- FLVFrame *prev = 0;
- for (;trav;) {
- if ( trav->timestamp >= frame->timestamp ) {
- frame->next = trav;
- if ( prev ) {
- prev->next = frame;
- } else {
- flv->frames = frame;
- }
- break;
- }
- prev = trav;
- trav = trav->next;
- }
- if ( !trav ) {
- prev->next = frame;
- }
- }
-}
-
-static void DumpFrame(ByteIOContext *pb, FLVFrame *frame)
-{
- put_byte(pb,frame->type); // message type
- put_be24(pb,frame->size+1); // include flags
- put_be24(pb,frame->timestamp); // time stamp
- put_be32(pb,0); // reserved
- put_byte(pb,frame->flags);
- put_buffer(pb, frame->data, frame->size);
- put_be32(pb,frame->size+1+11); // reserved
- av_free(frame->data);
-}
-
-static void Dump(FLVContext *flv, ByteIOContext *pb, int count)
-{
- int c=0;
- FLVFrame *trav = flv->frames;
- FLVFrame *prev = 0;
- for (;trav;c++) {
- trav = trav->next;
- }
- trav = flv->frames;
- for ( ; c >= count; c-- ) {
- DumpFrame(pb,trav);
- prev = trav;
- trav = trav->next;
- av_free(prev);
- }
- flv->frames = trav;
-}
-
-static int flv_write_trailer(AVFormatContext *s)
-{
- int64_t file_size;
- int flags = 0;
-
- ByteIOContext *pb = &s->pb;
- FLVContext *flv = s->priv_data;
-
- Dump(flv,pb,1);
-
- file_size = url_ftell(pb);
- flags |= flv->hasAudio ? 4 : 0;
- flags |= flv->hasVideo ? 1 : 0;
- url_fseek(pb, 4, SEEK_SET);
- put_byte(pb,flags);
- url_fseek(pb, file_size, SEEK_SET);
- return 0;
-}
-
-static int flv_write_packet(AVFormatContext *s, int stream_index,
- const uint8_t *buf, int size, int64_t timestamp)
-{
- ByteIOContext *pb = &s->pb;
- AVCodecContext *enc = &s->streams[stream_index]->codec;
- FLVContext *flv = s->priv_data;
-
- if (enc->codec_type == CODEC_TYPE_VIDEO) {
- FLVFrame *frame = av_malloc(sizeof(FLVFrame));
- frame->next = 0;
- frame->type = 9;
- frame->flags = 2; // choose h263
- frame->flags |= enc->coded_frame->key_frame ? 0x10 : 0x20; // add keyframe indicator
- frame->timestamp = timestamp;
- //frame->timestamp = ( ( flv->frameCount * (int64_t)FRAME_RATE_BASE * (int64_t)1000 ) / (int64_t)enc->frame_rate );
- //printf("%08x %f %f\n",frame->timestamp,(double)enc->frame_rate/(double)FRAME_RATE_BASE,1000*(double)FRAME_RATE_BASE/(double)enc->frame_rate);
- frame->size = size;
- frame->data = av_malloc(size);
- memcpy(frame->data,buf,size);
- flv->hasVideo = 1;
-
- InsertSorted(flv,frame);
-
- flv->frameCount ++;
- }
- else if (enc->codec_type == CODEC_TYPE_AUDIO) {
-#ifdef CONFIG_MP3LAME
- if (enc->codec_id == CODEC_ID_MP3 ) {
- int c=0;
- for (;c<size;c++) {
- flv->audioFifo[(flv->audioOutPos+c)%AUDIO_FIFO_SIZE] = buf[c];
- }
- flv->audioSize += size;
- flv->audioOutPos += size;
- flv->audioOutPos %= AUDIO_FIFO_SIZE;
-
- if ( flv->initDelay == -1 ) {
- flv->initDelay = timestamp;
- }
-
- if ( flv->audioTime == -1 ) {
- flv->audioTime = timestamp;
-// flv->audioTime = ( ( ( flv->sampleCount - enc->delay ) * 8000 ) / flv->audioRate ) - flv->initDelay - 250;
-// if ( flv->audioTime < 0 ) {
-// flv->audioTime = 0;
-// }
- }
- }
- for ( ; flv->audioSize >= 4 ; ) {
-
- int mp3FrameSize = 0;
- int mp3SampleRate = 0;
- int mp3IsMono = 0;
- int mp3SamplesPerFrame = 0;
-
- if ( mp3info(&flv->audioFifo[flv->audioInPos],&mp3FrameSize,&mp3SamplesPerFrame,&mp3SampleRate,&mp3IsMono) ) {
- if ( flv->audioSize >= mp3FrameSize ) {
-
- int soundFormat = 0x22;
- int c=0;
- FLVFrame *frame = av_malloc(sizeof(FLVFrame));
-
- flv->audioRate = mp3SampleRate;
-
- switch (mp3SampleRate) {
- case 44100:
- soundFormat |= 0x0C;
- break;
- case 22050:
- soundFormat |= 0x08;
- break;
- case 11025:
- soundFormat |= 0x04;
- break;
- }
-
- if ( !mp3IsMono ) {
- soundFormat |= 0x01;
- }
-
- frame->next = 0;
- frame->type = 8;
- frame->flags = soundFormat;
- frame->timestamp = flv->audioTime;
- frame->size = mp3FrameSize;
- frame->data = av_malloc(mp3FrameSize);
-
- for (;c<mp3FrameSize;c++) {
- frame->data[c] = flv->audioFifo[(flv->audioInPos+c)%AUDIO_FIFO_SIZE];
- }
-
- flv->audioInPos += mp3FrameSize;
- flv->audioSize -= mp3FrameSize;
- flv->audioInPos %= AUDIO_FIFO_SIZE;
- flv->sampleCount += mp3SamplesPerFrame;
-
- // Reset audio for next round
- flv->audioTime = -1;
- // We got audio! Make sure we set this to the global flags on closure
- flv->hasAudio = 1;
-
- InsertSorted(flv,frame);
- }
- break;
- }
- flv->audioInPos ++;
- flv->audioSize --;
- flv->audioInPos %= AUDIO_FIFO_SIZE;
- // no audio in here!
- flv->audioTime = -1;
- }
-#endif
- }
- Dump(flv,pb,128);
- put_flush_packet(pb);
- return 0;
-}
-
-static AVOutputFormat flv_oformat = {
- "flv",
- "flv format",
- "video/x-flashvideo",
- "flv",
- sizeof(FLVContext),
-#ifdef CONFIG_MP3LAME
- CODEC_ID_MP3,
-#else // CONFIG_MP3LAME
- CODEC_ID_NONE,
-#endif // CONFIG_MP3LAME
- CODEC_ID_FLV1,
- flv_write_header,
- flv_write_packet,
- flv_write_trailer,
-};
-
-int flvenc_init(void)
-{
- av_register_output_format(&flv_oformat);
- return 0;
-}
projects / synfig.git / blobdiff