/*
- * FLV encoder.
+ * FLV muxer
* Copyright (c) 2003 The FFmpeg Project.
*
- * This library is free software; you can redistribute it and/or
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg 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.
+ * version 2.1 of the License, or (at your option) any later version.
*
- * This library is distributed in the hope that it will be useful,
+ * FFmpeg 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
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "avformat.h"
+#include "flv.h"
+#include "riff.h"
#undef NDEBUG
#include <assert.h>
+static const AVCodecTag flv_video_codec_ids[] = {
+ {CODEC_ID_FLV1, FLV_CODECID_H263 },
+ {CODEC_ID_FLASHSV, FLV_CODECID_SCREEN},
+ {CODEC_ID_VP6F, FLV_CODECID_VP6 },
+ {CODEC_ID_VP6, FLV_CODECID_VP6 },
+ {CODEC_ID_NONE, 0}
+};
+
+static const AVCodecTag flv_audio_codec_ids[] = {
+ {CODEC_ID_MP3, FLV_CODECID_MP3 >> FLV_AUDIO_CODECID_OFFSET},
+ {CODEC_ID_PCM_S8, FLV_CODECID_PCM_BE >> FLV_AUDIO_CODECID_OFFSET},
+ {CODEC_ID_PCM_S16BE, FLV_CODECID_PCM_BE >> FLV_AUDIO_CODECID_OFFSET},
+ {CODEC_ID_PCM_S16LE, FLV_CODECID_PCM_LE >> FLV_AUDIO_CODECID_OFFSET},
+ {CODEC_ID_ADPCM_SWF, FLV_CODECID_ADPCM >> FLV_AUDIO_CODECID_OFFSET},
+ {CODEC_ID_NONE, 0}
+};
+
typedef struct FLVContext {
int hasAudio;
int hasVideo;
int reserved;
+ offset_t duration_offset;
+ offset_t filesize_offset;
+ int64_t duration;
} FLVContext;
-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 int get_audio_flags(AVCodecContext *enc){
- int flags = 0x02;
+ int flags = (enc->bits_per_sample == 16) ? FLV_SAMPLESSIZE_16BIT : FLV_SAMPLESSIZE_8BIT;
switch (enc->sample_rate) {
case 44100:
- flags |= 0x0C;
+ flags |= FLV_SAMPLERATE_44100HZ;
break;
case 22050:
- flags |= 0x08;
+ flags |= FLV_SAMPLERATE_22050HZ;
break;
case 11025:
- flags |= 0x04;
+ flags |= FLV_SAMPLERATE_11025HZ;
break;
case 8000: //nellymoser only
case 5512: //not mp3
- flags |= 0x00;
+ flags |= FLV_SAMPLERATE_SPECIAL;
break;
default:
+ av_log(enc, AV_LOG_ERROR, "flv doesnt support that sample rate, choose from (44100, 22050, 11025)\n");
return -1;
}
if (enc->channels > 1) {
- flags |= 0x01;
+ flags |= FLV_STEREO;
}
-
+
switch(enc->codec_id){
case CODEC_ID_MP3:
- flags |= 0x20;
+ flags |= FLV_CODECID_MP3 | FLV_SAMPLESSIZE_16BIT;
+ break;
+ case CODEC_ID_PCM_S8:
+ flags |= FLV_CODECID_PCM_BE | FLV_SAMPLESSIZE_8BIT;
+ break;
+ case CODEC_ID_PCM_S16BE:
+ flags |= FLV_CODECID_PCM_BE | FLV_SAMPLESSIZE_16BIT;
+ break;
+ case CODEC_ID_PCM_S16LE:
+ flags |= FLV_CODECID_PCM_LE | FLV_SAMPLESSIZE_16BIT;
+ break;
+ case CODEC_ID_ADPCM_SWF:
+ flags |= FLV_CODECID_ADPCM | FLV_SAMPLESSIZE_16BIT;
break;
case 0:
flags |= enc->codec_tag<<4;
break;
default:
+ av_log(enc, AV_LOG_ERROR, "codec not compatible with flv\n");
return -1;
}
-
+
return flags;
}
+static void put_amf_string(ByteIOContext *pb, const char *str)
+{
+ size_t len = strlen(str);
+ put_be16(pb, len);
+ put_buffer(pb, str, len);
+}
+
+static void put_amf_double(ByteIOContext *pb, double d)
+{
+ put_byte(pb, AMF_DATA_TYPE_NUMBER);
+ put_be64(pb, av_dbl2int(d));
+}
+
+static void put_amf_bool(ByteIOContext *pb, int b) {
+ put_byte(pb, AMF_DATA_TYPE_BOOL);
+ put_byte(pb, !!b);
+}
+
static int flv_write_header(AVFormatContext *s)
{
ByteIOContext *pb = &s->pb;
FLVContext *flv = s->priv_data;
- int i;
+ int i, width, height, samplerate, samplesize, channels, audiocodecid, videocodecid;
+ double framerate = 0.0;
+ int metadata_size_pos, data_size;
flv->hasAudio = 0;
flv->hasVideo = 0;
+ for(i=0; i<s->nb_streams; i++){
+ AVCodecContext *enc = s->streams[i]->codec;
+ if (enc->codec_type == CODEC_TYPE_VIDEO) {
+ width = enc->width;
+ height = enc->height;
+ if (s->streams[i]->r_frame_rate.den && s->streams[i]->r_frame_rate.num) {
+ framerate = av_q2d(s->streams[i]->r_frame_rate);
+ } else {
+ framerate = 1/av_q2d(s->streams[i]->codec->time_base);
+ }
+ flv->hasVideo=1;
+
+ videocodecid = enc->codec_tag;
+ if(videocodecid == 0) {
+ av_log(enc, AV_LOG_ERROR, "video codec not compatible with flv\n");
+ return -1;
+ }
+ } else {
+ flv->hasAudio=1;
+ samplerate = enc->sample_rate;
+ channels = enc->channels;
+
+ audiocodecid = enc->codec_tag;
+ samplesize = (enc->codec_id == CODEC_ID_PCM_S8) ? 8 : 16;
+
+ if(get_audio_flags(enc)<0)
+ return -1;
+ }
+ av_set_pts_info(s->streams[i], 24, 1, 1000); /* 24 bit pts in ms */
+ }
put_tag(pb,"FLV");
put_byte(pb,1);
- put_byte(pb,0); // delayed write
+ put_byte(pb, FLV_HEADER_FLAG_HASAUDIO * flv->hasAudio
+ + FLV_HEADER_FLAG_HASVIDEO * flv->hasVideo);
put_be32(pb,9);
put_be32(pb,0);
-
+
for(i=0; i<s->nb_streams; i++){
- AVCodecContext *enc = &s->streams[i]->codec;
- av_set_pts_info(s->streams[i], 24, 1, 1000); /* 24 bit pts in ms */
- if(enc->codec_tag == 5){
+ if(s->streams[i]->codec->codec_tag == 5){
put_byte(pb,8); // message type
put_be24(pb,0); // include flags
put_be24(pb,0); // time stamp
put_be32(pb,11); // size
flv->reserved=5;
}
- if(enc->codec_type == CODEC_TYPE_AUDIO && get_audio_flags(enc)<0)
- return -1;
}
+ /* write meta_tag */
+ put_byte(pb, 18); // tag type META
+ metadata_size_pos= url_ftell(pb);
+ put_be24(pb, 0); // size of data part (sum of all parts below)
+ put_be24(pb, 0); // time stamp
+ put_be32(pb, 0); // reserved
+
+ /* now data of data_size size */
+
+ /* first event name as a string */
+ put_byte(pb, AMF_DATA_TYPE_STRING);
+ put_amf_string(pb, "onMetaData"); // 12 bytes
+
+ /* mixed array (hash) with size and string/type/data tuples */
+ put_byte(pb, AMF_DATA_TYPE_MIXEDARRAY);
+ put_be32(pb, 5*flv->hasVideo + 4*flv->hasAudio + 2); // +2 for duration and file size
+
+ put_amf_string(pb, "duration");
+ flv->duration_offset= url_ftell(pb);
+ put_amf_double(pb, 0); // delayed write
+
+ if(flv->hasVideo){
+ put_amf_string(pb, "width");
+ put_amf_double(pb, width);
+
+ put_amf_string(pb, "height");
+ put_amf_double(pb, height);
+
+ put_amf_string(pb, "videodatarate");
+ put_amf_double(pb, s->bit_rate / 1024.0);
+
+ put_amf_string(pb, "framerate");
+ put_amf_double(pb, framerate);
+
+ put_amf_string(pb, "videocodecid");
+ put_amf_double(pb, videocodecid);
+ }
+
+ if(flv->hasAudio){
+ put_amf_string(pb, "audiosamplerate");
+ put_amf_double(pb, samplerate);
+
+ put_amf_string(pb, "audiosamplesize");
+ put_amf_double(pb, samplesize);
+
+ put_amf_string(pb, "stereo");
+ put_amf_bool(pb, (channels == 2));
+
+ put_amf_string(pb, "audiocodecid");
+ put_amf_double(pb, audiocodecid);
+ }
+
+ put_amf_string(pb, "filesize");
+ flv->filesize_offset= url_ftell(pb);
+ put_amf_double(pb, 0); // delayed write
+
+ put_amf_string(pb, "");
+ put_byte(pb, AMF_END_OF_OBJECT);
+
+ /* write total size of tag */
+ data_size= url_ftell(pb) - metadata_size_pos - 10;
+ url_fseek(pb, metadata_size_pos, SEEK_SET);
+ put_be24(pb, data_size);
+ url_fseek(pb, data_size + 10 - 3, SEEK_CUR);
+ put_be32(pb, data_size + 11);
+
return 0;
}
static int flv_write_trailer(AVFormatContext *s)
{
int64_t file_size;
- int flags = 0;
ByteIOContext *pb = &s->pb;
FLVContext *flv = s->priv_data;
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);
+
+ /* update informations */
+ url_fseek(pb, flv->duration_offset, SEEK_SET);
+ put_amf_double(pb, flv->duration / (double)1000);
+ url_fseek(pb, flv->filesize_offset, SEEK_SET);
+ put_amf_double(pb, file_size);
+
url_fseek(pb, file_size, SEEK_SET);
return 0;
}
static int flv_write_packet(AVFormatContext *s, AVPacket *pkt)
{
ByteIOContext *pb = &s->pb;
- AVCodecContext *enc = &s->streams[pkt->stream_index]->codec;
+ AVCodecContext *enc = s->streams[pkt->stream_index]->codec;
FLVContext *flv = s->priv_data;
int size= pkt->size;
int flags;
-// av_log(s, AV_LOG_DEBUG, "type:%d pts: %lld size:%d\n", enc->codec_type, timestamp, size);
-
+// av_log(s, AV_LOG_DEBUG, "type:%d pts: %"PRId64" size:%d\n", enc->codec_type, timestamp, size);
+
if (enc->codec_type == CODEC_TYPE_VIDEO) {
- put_byte(pb, 9);
- flags = 2; // choose h263
- flags |= pkt->flags & PKT_FLAG_KEY ? 0x10 : 0x20; // add keyframe indicator
- flv->hasVideo = 1;
+ put_byte(pb, FLV_TAG_TYPE_VIDEO);
+
+ flags = enc->codec_tag;
+ if(flags == 0) {
+ av_log(enc, AV_LOG_ERROR, "video codec %X not compatible with flv\n",enc->codec_id);
+ return -1;
+ }
+
+ flags |= pkt->flags & PKT_FLAG_KEY ? FLV_FRAME_KEY : FLV_FRAME_INTER;
} else {
assert(enc->codec_type == CODEC_TYPE_AUDIO);
flags = get_audio_flags(enc);
-
- assert(size);
- put_byte(pb, 8);
+ assert(size);
- // We got audio! Make sure we set this to the global flags on closure
- flv->hasAudio = 1;
+ put_byte(pb, FLV_TAG_TYPE_AUDIO);
}
- put_be24(pb,size+1); // include flags
+ if ((enc->codec_id == CODEC_ID_VP6) || (enc->codec_id == CODEC_ID_VP6F))
+ put_be24(pb,size+2); // include the extra byte needed for VP6 in flv and flags
+ else
+ put_be24(pb,size+1); // include flags
put_be24(pb,pkt->pts);
put_be32(pb,flv->reserved);
put_byte(pb,flags);
+ if (enc->codec_id == CODEC_ID_VP6)
+ put_byte(pb,0);
+ if (enc->codec_id == CODEC_ID_VP6F)
+ put_byte(pb, enc->extradata_size ? enc->extradata[0] : 0);
put_buffer(pb, pkt->data, size);
- put_be32(pb,size+1+11); // reserved
+ put_be32(pb,size+1+11); // previous tag size
+ flv->duration = pkt->pts + pkt->duration;
put_flush_packet(pb);
return 0;
}
-static AVOutputFormat flv_oformat = {
+AVOutputFormat flv_muxer = {
"flv",
"flv format",
- "video/x-flashvideo",
+ "video/x-flv",
"flv",
sizeof(FLVContext),
-#ifdef CONFIG_MP3LAME
+#ifdef CONFIG_LIBMP3LAME
CODEC_ID_MP3,
-#else // CONFIG_MP3LAME
+#else // CONFIG_LIBMP3LAME
CODEC_ID_NONE,
-#endif // CONFIG_MP3LAME
+#endif // CONFIG_LIBMP3LAME
CODEC_ID_FLV1,
flv_write_header,
flv_write_packet,
flv_write_trailer,
+ .codec_tag= (const AVCodecTag*[]){flv_video_codec_ids, flv_audio_codec_ids, 0},
};
-
-int flvenc_init(void)
-{
- av_register_output_format(&flv_oformat);
- return 0;
-}
projects / ffmpeg / blobdiff