/*
- * FLV encoder.
- * Copyright (c) 2003 The FFmpeg Project.
+ * FLV muxer
+ * Copyright (c) 2003 The Libav Project
*
- * This library is free software; you can redistribute it and/or
+ * This file is part of Libav.
+ *
+ * Libav 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,
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
+
+#include "libavutil/intfloat.h"
#include "avformat.h"
+#include "flv.h"
+#include "internal.h"
+#include "avc.h"
+#include "metadata.h"
+#include "libavutil/dict.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_FLASHSV2, FLV_CODECID_SCREEN2},
+ {CODEC_ID_VP6F, FLV_CODECID_VP6 },
+ {CODEC_ID_VP6, FLV_CODECID_VP6 },
+ {CODEC_ID_H264, FLV_CODECID_H264 },
+ {CODEC_ID_NONE, 0}
+};
+
+static const AVCodecTag flv_audio_codec_ids[] = {
+ {CODEC_ID_MP3, FLV_CODECID_MP3 >> FLV_AUDIO_CODECID_OFFSET},
+ {CODEC_ID_PCM_U8, FLV_CODECID_PCM >> FLV_AUDIO_CODECID_OFFSET},
+ {CODEC_ID_PCM_S16BE, FLV_CODECID_PCM >> 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_AAC, FLV_CODECID_AAC >> FLV_AUDIO_CODECID_OFFSET},
+ {CODEC_ID_NELLYMOSER, FLV_CODECID_NELLYMOSER >> FLV_AUDIO_CODECID_OFFSET},
+ {CODEC_ID_SPEEX, FLV_CODECID_SPEEX >> FLV_AUDIO_CODECID_OFFSET},
+ {CODEC_ID_NONE, 0}
+};
+
typedef struct FLVContext {
- int hasAudio;
- int hasVideo;
int reserved;
+ int64_t duration_offset;
+ int64_t filesize_offset;
+ int64_t duration;
+ int64_t delay; ///< first dts delay (needed for AVC & Speex)
} FLVContext;
+typedef struct FLVStreamContext {
+ int64_t last_ts; ///< last timestamp for each stream
+} FLVStreamContext;
+
static int get_audio_flags(AVCodecContext *enc){
- int flags = (enc->bits_per_sample == 16) ? 0x2 : 0x0;
+ int flags = (enc->bits_per_coded_sample == 16) ? FLV_SAMPLESSIZE_16BIT : FLV_SAMPLESSIZE_8BIT;
+ if (enc->codec_id == CODEC_ID_AAC) // specs force these parameters
+ return FLV_CODECID_AAC | FLV_SAMPLERATE_44100HZ | FLV_SAMPLESSIZE_16BIT | FLV_STEREO;
+ else if (enc->codec_id == CODEC_ID_SPEEX) {
+ if (enc->sample_rate != 16000) {
+ av_log(enc, AV_LOG_ERROR, "flv only supports wideband (16kHz) Speex audio\n");
+ return -1;
+ }
+ if (enc->channels != 1) {
+ av_log(enc, AV_LOG_ERROR, "flv only supports mono Speex audio\n");
+ return -1;
+ }
+ return FLV_CODECID_SPEEX | FLV_SAMPLERATE_11025HZ | FLV_SAMPLESSIZE_16BIT;
+ } else {
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 16000: //nellymoser only
case 8000: //nellymoser only
case 5512: //not mp3
- flags |= 0x00;
- break;
+ if(enc->codec_id != CODEC_ID_MP3){
+ flags |= FLV_SAMPLERATE_SPECIAL;
+ break;
+ }
default:
- av_log(enc, AV_LOG_ERROR, "flv doesnt support that sample rate, choose from (44100, 22050, 11025)\n");
+ av_log(enc, AV_LOG_ERROR, "flv does not 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 | 0x2;
+ flags |= FLV_CODECID_MP3 | FLV_SAMPLESSIZE_16BIT;
+ break;
+ case CODEC_ID_PCM_U8:
+ flags |= FLV_CODECID_PCM | FLV_SAMPLESSIZE_8BIT;
break;
- case CODEC_ID_PCM_S8:
- break;
case CODEC_ID_PCM_S16BE:
- flags |= 0x60 | 0x2;
- break;
+ flags |= FLV_CODECID_PCM | FLV_SAMPLESSIZE_16BIT;
+ break;
case CODEC_ID_PCM_S16LE:
- flags |= 0x2;
- break;
+ flags |= FLV_CODECID_PCM_LE | FLV_SAMPLESSIZE_16BIT;
+ break;
+ case CODEC_ID_ADPCM_SWF:
+ flags |= FLV_CODECID_ADPCM | FLV_SAMPLESSIZE_16BIT;
+ break;
+ case CODEC_ID_NELLYMOSER:
+ if (enc->sample_rate == 8000) {
+ flags |= FLV_CODECID_NELLYMOSER_8KHZ_MONO | FLV_SAMPLESSIZE_16BIT;
+ } else if (enc->sample_rate == 16000) {
+ flags |= FLV_CODECID_NELLYMOSER_16KHZ_MONO | FLV_SAMPLESSIZE_16BIT;
+ } else {
+ flags |= FLV_CODECID_NELLYMOSER | FLV_SAMPLESSIZE_16BIT;
+ }
+ break;
case 0:
flags |= enc->codec_tag<<4;
break;
av_log(enc, AV_LOG_ERROR, "codec not compatible with flv\n");
return -1;
}
-
+
return flags;
}
+static void put_amf_string(AVIOContext *pb, const char *str)
+{
+ size_t len = strlen(str);
+ avio_wb16(pb, len);
+ avio_write(pb, str, len);
+}
+
+static void put_avc_eos_tag(AVIOContext *pb, unsigned ts) {
+ avio_w8(pb, FLV_TAG_TYPE_VIDEO);
+ avio_wb24(pb, 5); /* Tag Data Size */
+ avio_wb24(pb, ts); /* lower 24 bits of timestamp in ms*/
+ avio_w8(pb, (ts >> 24) & 0x7F); /* MSB of ts in ms*/
+ avio_wb24(pb, 0); /* StreamId = 0 */
+ avio_w8(pb, 23); /* ub[4] FrameType = 1, ub[4] CodecId = 7 */
+ avio_w8(pb, 2); /* AVC end of sequence */
+ avio_wb24(pb, 0); /* Always 0 for AVC EOS. */
+ avio_wb32(pb, 16); /* Size of FLV tag */
+}
+
+static void put_amf_double(AVIOContext *pb, double d)
+{
+ avio_w8(pb, AMF_DATA_TYPE_NUMBER);
+ avio_wb64(pb, av_double2int(d));
+}
+
+static void put_amf_bool(AVIOContext *pb, int b) {
+ avio_w8(pb, AMF_DATA_TYPE_BOOL);
+ avio_w8(pb, !!b);
+}
+
static int flv_write_header(AVFormatContext *s)
{
- ByteIOContext *pb = &s->pb;
+ AVIOContext *pb = s->pb;
FLVContext *flv = s->priv_data;
- int i;
+ AVCodecContext *audio_enc = NULL, *video_enc = NULL;
+ int i, metadata_count = 0;
+ double framerate = 0.0;
+ int64_t metadata_size_pos, data_size, metadata_count_pos;
+ AVDictionaryEntry *tag = NULL;
- flv->hasAudio = 0;
- flv->hasVideo = 0;
-
- put_tag(pb,"FLV");
- put_byte(pb,1);
- put_byte(pb,0); // delayed write
- 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){
- put_byte(pb,8); // message type
- put_be24(pb,0); // include flags
- put_be24(pb,0); // time stamp
- put_be32(pb,0); // reserved
- put_be32(pb,11); // size
+ FLVStreamContext *sc;
+ if (enc->codec_type == AVMEDIA_TYPE_VIDEO) {
+ 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);
+ }
+ video_enc = enc;
+ if(enc->codec_tag == 0) {
+ av_log(enc, AV_LOG_ERROR, "video codec not compatible with flv\n");
+ return -1;
+ }
+ } else {
+ audio_enc = enc;
+ if(get_audio_flags(enc)<0)
+ return -1;
+ }
+ avpriv_set_pts_info(s->streams[i], 32, 1, 1000); /* 32 bit pts in ms */
+
+ sc = av_mallocz(sizeof(FLVStreamContext));
+ if (!sc)
+ return AVERROR(ENOMEM);
+ s->streams[i]->priv_data = sc;
+ sc->last_ts = -1;
+ }
+ flv->delay = AV_NOPTS_VALUE;
+
+ avio_write(pb, "FLV", 3);
+ avio_w8(pb,1);
+ avio_w8(pb, FLV_HEADER_FLAG_HASAUDIO * !!audio_enc
+ + FLV_HEADER_FLAG_HASVIDEO * !!video_enc);
+ avio_wb32(pb,9);
+ avio_wb32(pb,0);
+
+ for(i=0; i<s->nb_streams; i++){
+ if(s->streams[i]->codec->codec_tag == 5){
+ avio_w8(pb,8); // message type
+ avio_wb24(pb,0); // include flags
+ avio_wb24(pb,0); // time stamp
+ avio_wb32(pb,0); // reserved
+ avio_wb32(pb,11); // size
flv->reserved=5;
}
- if(enc->codec_type == CODEC_TYPE_AUDIO && get_audio_flags(enc)<0)
- return -1;
+ }
+
+ /* write meta_tag */
+ avio_w8(pb, 18); // tag type META
+ metadata_size_pos= avio_tell(pb);
+ avio_wb24(pb, 0); // size of data part (sum of all parts below)
+ avio_wb24(pb, 0); // time stamp
+ avio_wb32(pb, 0); // reserved
+
+ /* now data of data_size size */
+
+ /* first event name as a string */
+ avio_w8(pb, AMF_DATA_TYPE_STRING);
+ put_amf_string(pb, "onMetaData"); // 12 bytes
+
+ /* mixed array (hash) with size and string/type/data tuples */
+ avio_w8(pb, AMF_DATA_TYPE_MIXEDARRAY);
+ metadata_count_pos = avio_tell(pb);
+ metadata_count = 5*!!video_enc + 5*!!audio_enc + 2; // +2 for duration and file size
+ avio_wb32(pb, metadata_count);
+
+ put_amf_string(pb, "duration");
+ flv->duration_offset= avio_tell(pb);
+ put_amf_double(pb, s->duration / AV_TIME_BASE); // fill in the guessed duration, it'll be corrected later if incorrect
+
+ if(video_enc){
+ put_amf_string(pb, "width");
+ put_amf_double(pb, video_enc->width);
+
+ put_amf_string(pb, "height");
+ put_amf_double(pb, video_enc->height);
+
+ put_amf_string(pb, "videodatarate");
+ put_amf_double(pb, video_enc->bit_rate / 1024.0);
+
+ put_amf_string(pb, "framerate");
+ put_amf_double(pb, framerate);
+
+ put_amf_string(pb, "videocodecid");
+ put_amf_double(pb, video_enc->codec_tag);
+ }
+
+ if(audio_enc){
+ put_amf_string(pb, "audiodatarate");
+ put_amf_double(pb, audio_enc->bit_rate / 1024.0);
+
+ put_amf_string(pb, "audiosamplerate");
+ put_amf_double(pb, audio_enc->sample_rate);
+
+ put_amf_string(pb, "audiosamplesize");
+ put_amf_double(pb, audio_enc->codec_id == CODEC_ID_PCM_U8 ? 8 : 16);
+
+ put_amf_string(pb, "stereo");
+ put_amf_bool(pb, audio_enc->channels == 2);
+
+ put_amf_string(pb, "audiocodecid");
+ put_amf_double(pb, audio_enc->codec_tag);
+ }
+
+ while ((tag = av_dict_get(s->metadata, "", tag, AV_DICT_IGNORE_SUFFIX))) {
+ put_amf_string(pb, tag->key);
+ avio_w8(pb, AMF_DATA_TYPE_STRING);
+ put_amf_string(pb, tag->value);
+ metadata_count++;
+ }
+
+ put_amf_string(pb, "filesize");
+ flv->filesize_offset= avio_tell(pb);
+ put_amf_double(pb, 0); // delayed write
+
+ put_amf_string(pb, "");
+ avio_w8(pb, AMF_END_OF_OBJECT);
+
+ /* write total size of tag */
+ data_size= avio_tell(pb) - metadata_size_pos - 10;
+
+ avio_seek(pb, metadata_count_pos, SEEK_SET);
+ avio_wb32(pb, metadata_count);
+
+ avio_seek(pb, metadata_size_pos, SEEK_SET);
+ avio_wb24(pb, data_size);
+ avio_skip(pb, data_size + 10 - 3);
+ avio_wb32(pb, data_size + 11);
+
+ for (i = 0; i < s->nb_streams; i++) {
+ AVCodecContext *enc = s->streams[i]->codec;
+ if (enc->codec_id == CODEC_ID_AAC || enc->codec_id == CODEC_ID_H264) {
+ int64_t pos;
+ avio_w8(pb, enc->codec_type == AVMEDIA_TYPE_VIDEO ?
+ FLV_TAG_TYPE_VIDEO : FLV_TAG_TYPE_AUDIO);
+ avio_wb24(pb, 0); // size patched later
+ avio_wb24(pb, 0); // ts
+ avio_w8(pb, 0); // ts ext
+ avio_wb24(pb, 0); // streamid
+ pos = avio_tell(pb);
+ if (enc->codec_id == CODEC_ID_AAC) {
+ avio_w8(pb, get_audio_flags(enc));
+ avio_w8(pb, 0); // AAC sequence header
+ avio_write(pb, enc->extradata, enc->extradata_size);
+ } else {
+ avio_w8(pb, enc->codec_tag | FLV_FRAME_KEY); // flags
+ avio_w8(pb, 0); // AVC sequence header
+ avio_wb24(pb, 0); // composition time
+ ff_isom_write_avcc(pb, enc->extradata, enc->extradata_size);
+ }
+ data_size = avio_tell(pb) - pos;
+ avio_seek(pb, -data_size - 10, SEEK_CUR);
+ avio_wb24(pb, data_size);
+ avio_skip(pb, data_size + 10 - 3);
+ avio_wb32(pb, data_size + 11); // previous tag size
+ }
}
return 0;
static int flv_write_trailer(AVFormatContext *s)
{
int64_t file_size;
- int flags = 0;
- ByteIOContext *pb = &s->pb;
+ AVIOContext *pb = s->pb;
FLVContext *flv = s->priv_data;
+ int i;
- 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);
+ /* Add EOS tag */
+ for (i = 0; i < s->nb_streams; i++) {
+ AVCodecContext *enc = s->streams[i]->codec;
+ FLVStreamContext *sc = s->streams[i]->priv_data;
+ if (enc->codec_type == AVMEDIA_TYPE_VIDEO &&
+ enc->codec_id == CODEC_ID_H264) {
+ put_avc_eos_tag(pb, sc->last_ts);
+ }
+ }
+
+ file_size = avio_tell(pb);
+
+ /* update information */
+ avio_seek(pb, flv->duration_offset, SEEK_SET);
+ put_amf_double(pb, flv->duration / (double)1000);
+ avio_seek(pb, flv->filesize_offset, SEEK_SET);
+ put_amf_double(pb, file_size);
+
+ avio_seek(pb, file_size, SEEK_SET);
return 0;
}
static int flv_write_packet(AVFormatContext *s, AVPacket *pkt)
{
- ByteIOContext *pb = &s->pb;
+ AVIOContext *pb = s->pb;
AVCodecContext *enc = s->streams[pkt->stream_index]->codec;
FLVContext *flv = s->priv_data;
+ FLVStreamContext *sc = s->streams[pkt->stream_index]->priv_data;
+ unsigned ts;
int size= pkt->size;
- int flags;
-
-// av_log(s, AV_LOG_DEBUG, "type:%d pts: %lld 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;
+ uint8_t *data= NULL;
+ int flags, flags_size;
+
+// av_log(s, AV_LOG_DEBUG, "type:%d pts: %"PRId64" size:%d\n", enc->codec_type, timestamp, size);
+
+ if(enc->codec_id == CODEC_ID_VP6 || enc->codec_id == CODEC_ID_VP6F ||
+ enc->codec_id == CODEC_ID_AAC)
+ flags_size= 2;
+ else if(enc->codec_id == CODEC_ID_H264)
+ flags_size= 5;
+ else
+ flags_size= 1;
+
+ if (enc->codec_type == AVMEDIA_TYPE_VIDEO) {
+ avio_w8(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 & AV_PKT_FLAG_KEY ? FLV_FRAME_KEY : FLV_FRAME_INTER;
} else {
- assert(enc->codec_type == CODEC_TYPE_AUDIO);
+ assert(enc->codec_type == AVMEDIA_TYPE_AUDIO);
flags = get_audio_flags(enc);
-
+
assert(size);
- put_byte(pb, 8);
+ avio_w8(pb, FLV_TAG_TYPE_AUDIO);
+ }
- // We got audio! Make sure we set this to the global flags on closure
- flv->hasAudio = 1;
+ if (enc->codec_id == CODEC_ID_H264) {
+ /* check if extradata looks like MP4 */
+ if (enc->extradata_size > 0 && *(uint8_t*)enc->extradata != 1) {
+ if (ff_avc_parse_nal_units_buf(pkt->data, &data, &size) < 0)
+ return -1;
+ }
+ }
+ if (flv->delay == AV_NOPTS_VALUE)
+ flv->delay = -pkt->dts;
+ if (pkt->dts < -flv->delay) {
+ av_log(s, AV_LOG_WARNING, "Packets are not in the proper order with "
+ "respect to DTS\n");
+ return AVERROR(EINVAL);
}
- put_be24(pb,size+1); // include flags
- put_be24(pb,pkt->pts);
- put_be32(pb,flv->reserved);
- put_byte(pb,flags);
- put_buffer(pb, pkt->data, size);
- put_be32(pb,size+1+11); // previous tag size
-
- put_flush_packet(pb);
- return 0;
-}
+ ts = pkt->dts + flv->delay; // add delay to force positive dts
-static AVOutputFormat flv_oformat = {
- "flv",
- "flv format",
- "video/x-flv",
- "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,
-};
+ /* check Speex packet duration */
+ if (enc->codec_id == CODEC_ID_SPEEX && ts - sc->last_ts > 160) {
+ av_log(s, AV_LOG_WARNING, "Warning: Speex stream has more than "
+ "8 frames per packet. Adobe Flash "
+ "Player cannot handle this!\n");
+ }
-int flvenc_init(void)
-{
- av_register_output_format(&flv_oformat);
- return 0;
+ if (sc->last_ts < ts)
+ sc->last_ts = ts;
+
+ avio_wb24(pb,size + flags_size);
+ avio_wb24(pb,ts);
+ avio_w8(pb,(ts >> 24) & 0x7F); // timestamps are 32bits _signed_
+ avio_wb24(pb,flv->reserved);
+ avio_w8(pb,flags);
+ if (enc->codec_id == CODEC_ID_VP6)
+ avio_w8(pb,0);
+ if (enc->codec_id == CODEC_ID_VP6F)
+ avio_w8(pb, enc->extradata_size ? enc->extradata[0] : 0);
+ else if (enc->codec_id == CODEC_ID_AAC)
+ avio_w8(pb,1); // AAC raw
+ else if (enc->codec_id == CODEC_ID_H264) {
+ avio_w8(pb,1); // AVC NALU
+ avio_wb24(pb,pkt->pts - pkt->dts);
+ }
+
+ avio_write(pb, data ? data : pkt->data, size);
+
+ avio_wb32(pb,size+flags_size+11); // previous tag size
+ flv->duration = FFMAX(flv->duration, pkt->pts + flv->delay + pkt->duration);
+
+ avio_flush(pb);
+
+ av_free(data);
+
+ return pb->error;
}
+
+AVOutputFormat ff_flv_muxer = {
+ .name = "flv",
+ .long_name = NULL_IF_CONFIG_SMALL("FLV format"),
+ .mime_type = "video/x-flv",
+ .extensions = "flv",
+ .priv_data_size = sizeof(FLVContext),
+#if CONFIG_LIBMP3LAME
+ .audio_codec = CODEC_ID_MP3,
+#else // CONFIG_LIBMP3LAME
+ .audio_codec = CODEC_ID_ADPCM_SWF,
+#endif // CONFIG_LIBMP3LAME
+ .video_codec = CODEC_ID_FLV1,
+ .write_header = flv_write_header,
+ .write_packet = flv_write_packet,
+ .write_trailer = flv_write_trailer,
+ .codec_tag= (const AVCodecTag* const []){flv_video_codec_ids, flv_audio_codec_ids, 0},
+ .flags= AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS,
+};
projects / ffmpeg / blobdiff