[libav.git] / libavformat / flvenc.c

/*
 * FLV muxer
 * Copyright (c) 2003 The Libav Project
 *
 * 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 2.1 of the License, or (at your option) any later version.
 *
 * 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 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 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(AVFormatContext *s, AVCodecContext *enc)
{
    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(s, AV_LOG_ERROR, "flv only supports wideband (16kHz) Speex audio\n");
            return -1;
        }
        if (enc->channels != 1) {
            av_log(s, 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 |= FLV_SAMPLERATE_44100HZ;
            break;
        case    22050:
            flags |= FLV_SAMPLERATE_22050HZ;
            break;
        case    11025:
            flags |= FLV_SAMPLERATE_11025HZ;
            break;
        case    16000: //nellymoser only
        case     8000: //nellymoser only
        case     5512: //not mp3
            if(enc->codec_id != CODEC_ID_MP3){
                flags |= FLV_SAMPLERATE_SPECIAL;
                break;
            }
        default:
            av_log(s, AV_LOG_ERROR, "flv does not support that sample rate, choose from (44100, 22050, 11025).\n");
            return -1;
    }
    }

    if (enc->channels > 1) {
        flags |= FLV_STEREO;
    }

    switch(enc->codec_id){
    case CODEC_ID_MP3:
        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_S16BE:
        flags |= FLV_CODECID_PCM    | 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 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;
    default:
        av_log(s, 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)
{
    AVIOContext *pb = s->pb;
    FLVContext *flv = s->priv_data;
    AVCodecContext *audio_enc = NULL, *video_enc = NULL, *data_enc = NULL;
    int i, metadata_count = 0;
    double framerate = 0.0;
    int64_t metadata_size_pos, data_size, metadata_count_pos;
    AVDictionaryEntry *tag = NULL;

    for(i=0; i<s->nb_streams; i++){
        AVCodecContext *enc = s->streams[i]->codec;
        FLVStreamContext *sc;
        switch (enc->codec_type) {
        case 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(s, AV_LOG_ERROR, "video codec not compatible with flv\n");
                return -1;
            }
            break;
        case AVMEDIA_TYPE_AUDIO:
            audio_enc = enc;
            if (get_audio_flags(s, enc) < 0)
                return AVERROR_INVALIDDATA;
            break;
        case AVMEDIA_TYPE_DATA:
            if (enc->codec_id != CODEC_ID_TEXT) {
                av_log(s, AV_LOG_ERROR, "codec not compatible with flv\n");
                return AVERROR_INVALIDDATA;
            }
            data_enc = enc;
            break;
        default:
            av_log(s, AV_LOG_ERROR, "codec not compatible with flv\n");
            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;
        }
    }

    /* 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 +
                     1 * !!data_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);
    }

    if (data_enc) {
        put_amf_string(pb, "datastream");
        put_amf_double(pb, 0.0);
    }

    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(s, 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;

    AVIOContext *pb = s->pb;
    FLVContext *flv = s->priv_data;
    int i;

    /* 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)
{
    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;
    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;

    switch (enc->codec_type) {
    case AVMEDIA_TYPE_VIDEO:
        avio_w8(pb, FLV_TAG_TYPE_VIDEO);

        flags = enc->codec_tag;
        if(flags == 0) {
            av_log(s, 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;
        break;
    case AVMEDIA_TYPE_AUDIO:
        flags = get_audio_flags(s, enc);

        assert(size);

        avio_w8(pb, FLV_TAG_TYPE_AUDIO);
        break;

    case AVMEDIA_TYPE_DATA:
        avio_w8(pb, FLV_TAG_TYPE_META);
        break;
    default:
        return AVERROR(EINVAL);
    }
    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);
    }

    ts = pkt->dts + flv->delay; // add delay to force positive dts

    /* 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");
    }

    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);

    if (enc->codec_type == AVMEDIA_TYPE_DATA) {
        int data_size;
        int metadata_size_pos = avio_tell(pb);
        avio_w8(pb, AMF_DATA_TYPE_STRING);
        put_amf_string(pb, "onTextData");
        avio_w8(pb, AMF_DATA_TYPE_MIXEDARRAY);
        avio_wb32(pb, 2);
        put_amf_string(pb, "type");
        avio_w8(pb, AMF_DATA_TYPE_STRING);
        put_amf_string(pb, "Text");
        put_amf_string(pb, "text");
        avio_w8(pb, AMF_DATA_TYPE_STRING);
        put_amf_string(pb, pkt->data);
        put_amf_string(pb, "");
        avio_w8(pb, AMF_END_OF_OBJECT);
        /* write total size of tag */
        data_size = avio_tell(pb) - metadata_size_pos;
        avio_seek(pb, metadata_size_pos - 10, SEEK_SET);
        avio_wb24(pb, data_size);
        avio_seek(pb, data_size + 10 - 3, SEEK_CUR);
        avio_wb32(pb, data_size + 11);
    } else {
    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 |
                      AVFMT_TS_NONSTRICT,
};
Commit	Line	Data
d4f5d74a	1	/*
7fbde343	2	* FLV muxer
2912e87a	3	* Copyright (c) 2003 The Libav Project
d4f5d74a	4	*
2912e87a	5	* This file is part of Libav.
b78e7197	6	*
2912e87a	7	* Libav is free software; you can redistribute it and/or
d4f5d74a GM	8	* modify it under the terms of the GNU Lesser General Public
d4f5d74a GM	9	* License as published by the Free Software Foundation; either
b78e7197	10	* version 2.1 of the License, or (at your option) any later version.
d4f5d74a	11	*
2912e87a	12	* Libav is distributed in the hope that it will be useful,
d4f5d74a GM	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	15	* Lesser General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU Lesser General Public
2912e87a	18	* License along with Libav; if not, write to the Free Software
5509bffa	19	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
d4f5d74a	20	*/
ee8aecd2	21
3383a53e	22	#include "libavutil/intfloat.h"
d4f5d74a	23	#include "avformat.h"
6cac3a3b	24	#include "flv.h"
80b39e1c	25	#include "internal.h"
f23496b5	26	#include "avc.h"
16f82508	27	#include "metadata.h"
d2d67e42	28	#include "libavutil/dict.h"
d4f5d74a	29
068f2a22 MN	30	#undef NDEBUG
	31	#include <assert.h>
	32
7caf0cc6	33	static const AVCodecTag flv_video_codec_ids[] = {
148c9bdb AH	34	{CODEC_ID_FLV1, FLV_CODECID_H263 },
148c9bdb AH	35	{CODEC_ID_FLASHSV, FLV_CODECID_SCREEN},
1b88277b	36	{CODEC_ID_FLASHSV2, FLV_CODECID_SCREEN2},
148c9bdb	37	{CODEC_ID_VP6F, FLV_CODECID_VP6 },
09d8c0ae	38	{CODEC_ID_VP6, FLV_CODECID_VP6 },
f23496b5	39	{CODEC_ID_H264, FLV_CODECID_H264 },
148c9bdb AH	40	{CODEC_ID_NONE, 0}
	41	};
	42
7caf0cc6	43	static const AVCodecTag flv_audio_codec_ids[] = {
148c9bdb	44	{CODEC_ID_MP3, FLV_CODECID_MP3 >> FLV_AUDIO_CODECID_OFFSET},
8e9efe43	45	{CODEC_ID_PCM_U8, FLV_CODECID_PCM >> FLV_AUDIO_CODECID_OFFSET},
44de39f9	46	{CODEC_ID_PCM_S16BE, FLV_CODECID_PCM >> FLV_AUDIO_CODECID_OFFSET},
148c9bdb AH	47	{CODEC_ID_PCM_S16LE, FLV_CODECID_PCM_LE >> FLV_AUDIO_CODECID_OFFSET},
148c9bdb AH	48	{CODEC_ID_ADPCM_SWF, FLV_CODECID_ADPCM >> FLV_AUDIO_CODECID_OFFSET},
f23496b5	49	{CODEC_ID_AAC, FLV_CODECID_AAC >> FLV_AUDIO_CODECID_OFFSET},
b7d1cd02	50	{CODEC_ID_NELLYMOSER, FLV_CODECID_NELLYMOSER >> FLV_AUDIO_CODECID_OFFSET},
046c4001	51	{CODEC_ID_SPEEX, FLV_CODECID_SPEEX >> FLV_AUDIO_CODECID_OFFSET},
148c9bdb AH	52	{CODEC_ID_NONE, 0}
	53	};
	54
d4f5d74a	55	typedef struct FLVContext {
11a8e425	56	int reserved;
bc5c918e DB	57	int64_t duration_offset;
bc5c918e DB	58	int64_t filesize_offset;
634b8cfa	59	int64_t duration;
905de119	60	int64_t delay; ///< first dts delay (needed for AVC & Speex)
d4f5d74a GM	61	} FLVContext;
d4f5d74a GM	62
ef74e397	63	typedef struct FLVStreamContext {
ef74e397 JR	64	int64_t last_ts; ///< last timestamp for each stream
	65	} FLVStreamContext;
	66
0a3ad7ff AK	67	static int get_audio_flags(AVFormatContext s, AVCodecContext enc)
0a3ad7ff AK	68	{
dd1c8f3e	69	int flags = (enc->bits_per_coded_sample == 16) ? FLV_SAMPLESSIZE_16BIT : FLV_SAMPLESSIZE_8BIT;
37cdf93d	70
f23496b5 BC	71	if (enc->codec_id == CODEC_ID_AAC) // specs force these parameters
f23496b5 BC	72	return FLV_CODECID_AAC \| FLV_SAMPLERATE_44100HZ \| FLV_SAMPLESSIZE_16BIT \| FLV_STEREO;
046c4001 JR	73	else if (enc->codec_id == CODEC_ID_SPEEX) {
046c4001 JR	74	if (enc->sample_rate != 16000) {
0a3ad7ff	75	av_log(s, AV_LOG_ERROR, "flv only supports wideband (16kHz) Speex audio\n");
046c4001 JR	76	return -1;
	77	}
	78	if (enc->channels != 1) {
0a3ad7ff	79	av_log(s, AV_LOG_ERROR, "flv only supports mono Speex audio\n");
046c4001 JR	80	return -1;
046c4001 JR	81	}
046c4001 JR	82	return FLV_CODECID_SPEEX \| FLV_SAMPLERATE_11025HZ \| FLV_SAMPLESSIZE_16BIT;
046c4001 JR	83	} else {
37cdf93d MN	84	switch (enc->sample_rate) {
37cdf93d MN	85	case 44100:
6cac3a3b	86	flags \|= FLV_SAMPLERATE_44100HZ;
37cdf93d MN	87	break;
37cdf93d MN	88	case 22050:
6cac3a3b	89	flags \|= FLV_SAMPLERATE_22050HZ;
37cdf93d MN	90	break;
37cdf93d MN	91	case 11025:
6cac3a3b	92	flags \|= FLV_SAMPLERATE_11025HZ;
37cdf93d	93	break;
bd2ff1a8	94	case 16000: //nellymoser only
37cdf93d MN	95	case 8000: //nellymoser only
37cdf93d MN	96	case 5512: //not mp3
4838727e	97	if(enc->codec_id != CODEC_ID_MP3){
ec627278 MN	98	flags \|= FLV_SAMPLERATE_SPECIAL;
ec627278 MN	99	break;
4838727e	100	}
37cdf93d	101	default:
0a3ad7ff	102	av_log(s, AV_LOG_ERROR, "flv does not support that sample rate, choose from (44100, 22050, 11025).\n");
37cdf93d MN	103	return -1;
37cdf93d MN	104	}
f23496b5	105	}
37cdf93d MN	106
37cdf93d MN	107	if (enc->channels > 1) {
6cac3a3b	108	flags \|= FLV_STEREO;
37cdf93d	109	}
115329f1	110
37cdf93d MN	111	switch(enc->codec_id){
37cdf93d MN	112	case CODEC_ID_MP3:
6cac3a3b	113	flags \|= FLV_CODECID_MP3 \| FLV_SAMPLESSIZE_16BIT;
37cdf93d	114	break;
8e9efe43	115	case CODEC_ID_PCM_U8:
44de39f9	116	flags \|= FLV_CODECID_PCM \| FLV_SAMPLESSIZE_8BIT;
bb270c08	117	break;
923bd441	118	case CODEC_ID_PCM_S16BE:
44de39f9	119	flags \|= FLV_CODECID_PCM \| FLV_SAMPLESSIZE_16BIT;
bb270c08	120	break;
923bd441	121	case CODEC_ID_PCM_S16LE:
6cac3a3b	122	flags \|= FLV_CODECID_PCM_LE \| FLV_SAMPLESSIZE_16BIT;
bb270c08	123	break;
2fde8aae	124	case CODEC_ID_ADPCM_SWF:
e9509536	125	flags \|= FLV_CODECID_ADPCM \| FLV_SAMPLESSIZE_16BIT;
bb270c08	126	break;
b7d1cd02	127	case CODEC_ID_NELLYMOSER:
8ddd280d AW	128	if (enc->sample_rate == 8000) {
8ddd280d AW	129	flags \|= FLV_CODECID_NELLYMOSER_8KHZ_MONO \| FLV_SAMPLESSIZE_16BIT;
bd2ff1a8 MS	130	} else if (enc->sample_rate == 16000) {
bd2ff1a8 MS	131	flags \|= FLV_CODECID_NELLYMOSER_16KHZ_MONO \| FLV_SAMPLESSIZE_16BIT;
8ddd280d AW	132	} else {
	133	flags \|= FLV_CODECID_NELLYMOSER \| FLV_SAMPLESSIZE_16BIT;
	134	}
b7d1cd02	135	break;
37cdf93d MN	136	case 0:
	137	flags \|= enc->codec_tag<<4;
	138	break;
	139	default:
0a3ad7ff	140	av_log(s, AV_LOG_ERROR, "codec not compatible with flv\n");
37cdf93d MN	141	return -1;
37cdf93d MN	142	}
115329f1	143
37cdf93d MN	144	return flags;
	145	}
	146
ae628ec1	147	static void put_amf_string(AVIOContext pb, const char str)
fd0fb306 MN	148	{
fd0fb306 MN	149	size_t len = strlen(str);
77eb5504 AK	150	avio_wb16(pb, len);
77eb5504 AK	151	avio_write(pb, str, len);
fd0fb306 MN	152	}
fd0fb306 MN	153
ae628ec1	154	static void put_avc_eos_tag(AVIOContext *pb, unsigned ts) {
77eb5504 AK	155	avio_w8(pb, FLV_TAG_TYPE_VIDEO);
	156	avio_wb24(pb, 5); /* Tag Data Size */
	157	avio_wb24(pb, ts); /* lower 24 bits of timestamp in ms*/
	158	avio_w8(pb, (ts >> 24) & 0x7F); /* MSB of ts in ms*/
	159	avio_wb24(pb, 0); /* StreamId = 0 */
	160	avio_w8(pb, 23); /* ub[4] FrameType = 1, ub[4] CodecId = 7 */
	161	avio_w8(pb, 2); /* AVC end of sequence */
	162	avio_wb24(pb, 0); /* Always 0 for AVC EOS. */
	163	avio_wb32(pb, 16); /* Size of FLV tag */
df4f1d51 TF	164	}
df4f1d51 TF	165
ae628ec1	166	static void put_amf_double(AVIOContext *pb, double d)
fd0fb306	167	{
77eb5504	168	avio_w8(pb, AMF_DATA_TYPE_NUMBER);
3383a53e	169	avio_wb64(pb, av_double2int(d));
fd0fb306 MN	170	}
fd0fb306 MN	171
ae628ec1	172	static void put_amf_bool(AVIOContext *pb, int b) {
77eb5504 AK	173	avio_w8(pb, AMF_DATA_TYPE_BOOL);
77eb5504 AK	174	avio_w8(pb, !!b);
148c9bdb AH	175	}
148c9bdb AH	176
d4f5d74a GM	177	static int flv_write_header(AVFormatContext *s)
d4f5d74a GM	178	{
ae628ec1	179	AVIOContext *pb = s->pb;
d4f5d74a	180	FLVContext *flv = s->priv_data;
21e2dc9f	181	AVCodecContext audio_enc = NULL, video_enc = NULL, *data_enc = NULL;
cad0c375	182	int i, metadata_count = 0;
fd0fb306	183	double framerate = 0.0;
cad0c375	184	int64_t metadata_size_pos, data_size, metadata_count_pos;
d2d67e42	185	AVDictionaryEntry *tag = NULL;
d4f5d74a	186
11a8e425	187	for(i=0; i<s->nb_streams; i++){
01f4895c	188	AVCodecContext *enc = s->streams[i]->codec;
ef74e397	189	FLVStreamContext *sc;
21e2dc9f LB	190	switch (enc->codec_type) {
21e2dc9f LB	191	case AVMEDIA_TYPE_VIDEO:
fd0fb306 MN	192	if (s->streams[i]->r_frame_rate.den && s->streams[i]->r_frame_rate.num) {
	193	framerate = av_q2d(s->streams[i]->r_frame_rate);
	194	} else {
	195	framerate = 1/av_q2d(s->streams[i]->codec->time_base);
	196	}
5366f15d BC	197	video_enc = enc;
5366f15d BC	198	if(enc->codec_tag == 0) {
0a3ad7ff	199	av_log(s, AV_LOG_ERROR, "video codec not compatible with flv\n");
148c9bdb AH	200	return -1;
148c9bdb AH	201	}
21e2dc9f LB	202	break;
21e2dc9f LB	203	case AVMEDIA_TYPE_AUDIO:
5366f15d	204	audio_enc = enc;
0a3ad7ff	205	if (get_audio_flags(s, enc) < 0)
21e2dc9f LB	206	return AVERROR_INVALIDDATA;
	207	break;
	208	case AVMEDIA_TYPE_DATA:
	209	if (enc->codec_id != CODEC_ID_TEXT) {
	210	av_log(s, AV_LOG_ERROR, "codec not compatible with flv\n");
	211	return AVERROR_INVALIDDATA;
	212	}
	213	data_enc = enc;
	214	break;
	215	default:
	216	av_log(s, AV_LOG_ERROR, "codec not compatible with flv\n");
	217	return -1;
fd0fb306	218	}
c3f9ebf7	219	avpriv_set_pts_info(s->streams[i], 32, 1, 1000); /* 32 bit pts in ms */
ef74e397 JR	220
	221	sc = av_mallocz(sizeof(FLVStreamContext));
	222	if (!sc)
	223	return AVERROR(ENOMEM);
	224	s->streams[i]->priv_data = sc;
	225	sc->last_ts = -1;
c45388b1	226	}
905de119 JR	227	flv->delay = AV_NOPTS_VALUE;
905de119 JR	228
bbc413f9	229	avio_write(pb, "FLV", 3);
77eb5504 AK	230	avio_w8(pb,1);
77eb5504 AK	231	avio_w8(pb, FLV_HEADER_FLAG_HASAUDIO * !!audio_enc
5366f15d	232	+ FLV_HEADER_FLAG_HASVIDEO * !!video_enc);
77eb5504 AK	233	avio_wb32(pb,9);
77eb5504 AK	234	avio_wb32(pb,0);
c45388b1 MN	235
	236	for(i=0; i<s->nb_streams; i++){
	237	if(s->streams[i]->codec->codec_tag == 5){
77eb5504 AK	238	avio_w8(pb,8); // message type
	239	avio_wb24(pb,0); // include flags
	240	avio_wb24(pb,0); // time stamp
	241	avio_wb32(pb,0); // reserved
	242	avio_wb32(pb,11); // size
11a8e425 MN	243	flv->reserved=5;
	244	}
	245	}
d4f5d74a	246
fd0fb306	247	/* write meta_tag */
77eb5504	248	avio_w8(pb, 18); // tag type META
a2704c97	249	metadata_size_pos= avio_tell(pb);
77eb5504 AK	250	avio_wb24(pb, 0); // size of data part (sum of all parts below)
	251	avio_wb24(pb, 0); // time stamp
	252	avio_wb32(pb, 0); // reserved
fd0fb306 MN	253
	254	/* now data of data_size size */
	255
	256	/* first event name as a string */
77eb5504	257	avio_w8(pb, AMF_DATA_TYPE_STRING);
fd0fb306 MN	258	put_amf_string(pb, "onMetaData"); // 12 bytes
	259
	260	/* mixed array (hash) with size and string/type/data tuples */
77eb5504	261	avio_w8(pb, AMF_DATA_TYPE_MIXEDARRAY);
cad0c375	262	metadata_count_pos = avio_tell(pb);
21e2dc9f LB	263	metadata_count = 5 * !!video_enc +
	264	5 * !!audio_enc +
	265	1 * !!data_enc +
	266	2; // +2 for duration and file size
	267
cad0c375	268	avio_wb32(pb, metadata_count);
fd0fb306	269
634b8cfa	270	put_amf_string(pb, "duration");
a2704c97	271	flv->duration_offset= avio_tell(pb);
c5e1e982	272	put_amf_double(pb, s->duration / AV_TIME_BASE); // fill in the guessed duration, it'll be corrected later if incorrect
fd0fb306	273
5366f15d	274	if(video_enc){
fd0fb306	275	put_amf_string(pb, "width");
5366f15d	276	put_amf_double(pb, video_enc->width);
fd0fb306 MN	277
fd0fb306 MN	278	put_amf_string(pb, "height");
5366f15d	279	put_amf_double(pb, video_enc->height);
fd0fb306 MN	280
fd0fb306 MN	281	put_amf_string(pb, "videodatarate");
426a6f34	282	put_amf_double(pb, video_enc->bit_rate / 1024.0);
fd0fb306 MN	283
	284	put_amf_string(pb, "framerate");
	285	put_amf_double(pb, framerate);
148c9bdb AH	286
148c9bdb AH	287	put_amf_string(pb, "videocodecid");
5366f15d	288	put_amf_double(pb, video_enc->codec_tag);
fd0fb306 MN	289	}
fd0fb306 MN	290
5366f15d	291	if(audio_enc){
426a6f34 SK	292	put_amf_string(pb, "audiodatarate");
	293	put_amf_double(pb, audio_enc->bit_rate / 1024.0);
	294
fd0fb306	295	put_amf_string(pb, "audiosamplerate");
5366f15d	296	put_amf_double(pb, audio_enc->sample_rate);
148c9bdb AH	297
148c9bdb AH	298	put_amf_string(pb, "audiosamplesize");
8e9efe43	299	put_amf_double(pb, audio_enc->codec_id == CODEC_ID_PCM_U8 ? 8 : 16);
148c9bdb AH	300
148c9bdb AH	301	put_amf_string(pb, "stereo");
5366f15d	302	put_amf_bool(pb, audio_enc->channels == 2);
148c9bdb AH	303
148c9bdb AH	304	put_amf_string(pb, "audiocodecid");
5366f15d	305	put_amf_double(pb, audio_enc->codec_tag);
fd0fb306 MN	306	}
fd0fb306 MN	307
21e2dc9f LB	308	if (data_enc) {
	309	put_amf_string(pb, "datastream");
	310	put_amf_double(pb, 0.0);
	311	}
	312
d2d67e42	313	while ((tag = av_dict_get(s->metadata, "", tag, AV_DICT_IGNORE_SUFFIX))) {
16f82508	314	put_amf_string(pb, tag->key);
77eb5504	315	avio_w8(pb, AMF_DATA_TYPE_STRING);
16f82508	316	put_amf_string(pb, tag->value);
cad0c375	317	metadata_count++;
16f82508 TT	318	}
16f82508 TT	319
634b8cfa	320	put_amf_string(pb, "filesize");
a2704c97	321	flv->filesize_offset= avio_tell(pb);
634b8cfa	322	put_amf_double(pb, 0); // delayed write
fd0fb306 MN	323
fd0fb306 MN	324	put_amf_string(pb, "");
77eb5504	325	avio_w8(pb, AMF_END_OF_OBJECT);
fd0fb306 MN	326
fd0fb306 MN	327	/* write total size of tag */
a2704c97	328	data_size= avio_tell(pb) - metadata_size_pos - 10;
cad0c375 MS	329
	330	avio_seek(pb, metadata_count_pos, SEEK_SET);
	331	avio_wb32(pb, metadata_count);
	332
6b4aa5da	333	avio_seek(pb, metadata_size_pos, SEEK_SET);
77eb5504	334	avio_wb24(pb, data_size);
45a8a02a	335	avio_skip(pb, data_size + 10 - 3);
77eb5504	336	avio_wb32(pb, data_size + 11);
fd0fb306	337
f23496b5 BC	338	for (i = 0; i < s->nb_streams; i++) {
	339	AVCodecContext *enc = s->streams[i]->codec;
	340	if (enc->codec_id == CODEC_ID_AAC \|\| enc->codec_id == CODEC_ID_H264) {
bc5c918e	341	int64_t pos;
77eb5504	342	avio_w8(pb, enc->codec_type == AVMEDIA_TYPE_VIDEO ?
f23496b5	343	FLV_TAG_TYPE_VIDEO : FLV_TAG_TYPE_AUDIO);
77eb5504 AK	344	avio_wb24(pb, 0); // size patched later
	345	avio_wb24(pb, 0); // ts
	346	avio_w8(pb, 0); // ts ext
	347	avio_wb24(pb, 0); // streamid
a2704c97	348	pos = avio_tell(pb);
f23496b5	349	if (enc->codec_id == CODEC_ID_AAC) {
0a3ad7ff	350	avio_w8(pb, get_audio_flags(s, enc));
77eb5504 AK	351	avio_w8(pb, 0); // AAC sequence header
77eb5504 AK	352	avio_write(pb, enc->extradata, enc->extradata_size);
f23496b5	353	} else {
77eb5504 AK	354	avio_w8(pb, enc->codec_tag \| FLV_FRAME_KEY); // flags
	355	avio_w8(pb, 0); // AVC sequence header
	356	avio_wb24(pb, 0); // composition time
f23496b5 BC	357	ff_isom_write_avcc(pb, enc->extradata, enc->extradata_size);
f23496b5 BC	358	}
a2704c97	359	data_size = avio_tell(pb) - pos;
6b4aa5da	360	avio_seek(pb, -data_size - 10, SEEK_CUR);
77eb5504	361	avio_wb24(pb, data_size);
45a8a02a	362	avio_skip(pb, data_size + 10 - 3);
77eb5504	363	avio_wb32(pb, data_size + 11); // previous tag size
f23496b5 BC	364	}
	365	}
	366
d4f5d74a GM	367	return 0;
	368	}
	369
d4f5d74a GM	370	static int flv_write_trailer(AVFormatContext *s)
d4f5d74a GM	371	{
14b32253	372	int64_t file_size;
14b32253	373
ae628ec1	374	AVIOContext *pb = s->pb;
d4f5d74a	375	FLVContext *flv = s->priv_data;
df4f1d51 TF	376	int i;
	377
	378	/* Add EOS tag */
	379	for (i = 0; i < s->nb_streams; i++) {
	380	AVCodecContext *enc = s->streams[i]->codec;
ef74e397	381	FLVStreamContext *sc = s->streams[i]->priv_data;
b9f9e59a	382	if (enc->codec_type == AVMEDIA_TYPE_VIDEO &&
df4f1d51	383	enc->codec_id == CODEC_ID_H264) {
ef74e397	384	put_avc_eos_tag(pb, sc->last_ts);
df4f1d51 TF	385	}
df4f1d51 TF	386	}
d4f5d74a	387
a2704c97	388	file_size = avio_tell(pb);
634b8cfa	389
da9cea77	390	/* update information */
6b4aa5da	391	avio_seek(pb, flv->duration_offset, SEEK_SET);
634b8cfa	392	put_amf_double(pb, flv->duration / (double)1000);
6b4aa5da	393	avio_seek(pb, flv->filesize_offset, SEEK_SET);
634b8cfa BC	394	put_amf_double(pb, file_size);
634b8cfa BC	395
6b4aa5da	396	avio_seek(pb, file_size, SEEK_SET);
d4f5d74a GM	397	return 0;
	398	}
	399
e928649b	400	static int flv_write_packet(AVFormatContext s, AVPacket pkt)
d4f5d74a	401	{
ae628ec1	402	AVIOContext *pb = s->pb;
01f4895c	403	AVCodecContext *enc = s->streams[pkt->stream_index]->codec;
d4f5d74a	404	FLVContext *flv = s->priv_data;
ef74e397	405	FLVStreamContext *sc = s->streams[pkt->stream_index]->priv_data;
f23496b5	406	unsigned ts;
e928649b	407	int size= pkt->size;
71e685b0	408	uint8_t *data= NULL;
f683dbdc	409	int flags, flags_size;
d4f5d74a	410
949b1a13	411	// av_log(s, AV_LOG_DEBUG, "type:%d pts: %"PRId64" size:%d\n", enc->codec_type, timestamp, size);
115329f1	412
f23496b5 BC	413	if(enc->codec_id == CODEC_ID_VP6 \|\| enc->codec_id == CODEC_ID_VP6F \|\|
f23496b5 BC	414	enc->codec_id == CODEC_ID_AAC)
f683dbdc	415	flags_size= 2;
f23496b5 BC	416	else if(enc->codec_id == CODEC_ID_H264)
f23496b5 BC	417	flags_size= 5;
f683dbdc MN	418	else
	419	flags_size= 1;
	420
21e2dc9f LB	421	switch (enc->codec_type) {
21e2dc9f LB	422	case AVMEDIA_TYPE_VIDEO:
77eb5504	423	avio_w8(pb, FLV_TAG_TYPE_VIDEO);
09d8c0ae	424
bb85077f	425	flags = enc->codec_tag;
09d8c0ae	426	if(flags == 0) {
0a3ad7ff	427	av_log(s, AV_LOG_ERROR, "video codec %X not compatible with flv\n",enc->codec_id);
09d8c0ae BL	428	return -1;
	429	}
	430
cc947f04	431	flags \|= pkt->flags & AV_PKT_FLAG_KEY ? FLV_FRAME_KEY : FLV_FRAME_INTER;
21e2dc9f LB	432	break;
21e2dc9f LB	433	case AVMEDIA_TYPE_AUDIO:
0a3ad7ff	434	flags = get_audio_flags(s, enc);
115329f1	435
068f2a22	436	assert(size);
068f2a22	437
77eb5504	438	avio_w8(pb, FLV_TAG_TYPE_AUDIO);
21e2dc9f	439	break;
75293f05	440
21e2dc9f LB	441	case AVMEDIA_TYPE_DATA:
	442	avio_w8(pb, FLV_TAG_TYPE_META);
	443	break;
	444	default:
	445	return AVERROR(EINVAL);
	446	}
7d637efa	447	if (enc->codec_id == CODEC_ID_H264) {
da9cea77	448	/* check if extradata looks like MP4 */
71e685b0 BC	449	if (enc->extradata_size > 0 && (uint8_t)enc->extradata != 1) {
	450	if (ff_avc_parse_nal_units_buf(pkt->data, &data, &size) < 0)
	451	return -1;
	452	}
f23496b5	453	}
905de119 JR	454	if (flv->delay == AV_NOPTS_VALUE)
	455	flv->delay = -pkt->dts;
	456	if (pkt->dts < -flv->delay) {
	457	av_log(s, AV_LOG_WARNING, "Packets are not in the proper order with "
	458	"respect to DTS\n");
	459	return AVERROR(EINVAL);
	460	}
f23496b5	461
905de119	462	ts = pkt->dts + flv->delay; // add delay to force positive dts
4ee247a2 JR	463
4ee247a2 JR	464	/* check Speex packet duration */
ef74e397	465	if (enc->codec_id == CODEC_ID_SPEEX && ts - sc->last_ts > 160) {
4ee247a2 JR	466	av_log(s, AV_LOG_WARNING, "Warning: Speex stream has more than "
	467	"8 frames per packet. Adobe Flash "
	468	"Player cannot handle this!\n");
df4f1d51	469	}
4ee247a2	470
ef74e397 JR	471	if (sc->last_ts < ts)
ef74e397 JR	472	sc->last_ts = ts;
4ee247a2	473
77eb5504 AK	474	avio_wb24(pb,size + flags_size);
	475	avio_wb24(pb,ts);
	476	avio_w8(pb,(ts >> 24) & 0x7F); // timestamps are 32bits _signed_
	477	avio_wb24(pb,flv->reserved);
21e2dc9f LB	478
	479	if (enc->codec_type == AVMEDIA_TYPE_DATA) {
	480	int data_size;
	481	int metadata_size_pos = avio_tell(pb);
	482	avio_w8(pb, AMF_DATA_TYPE_STRING);
	483	put_amf_string(pb, "onTextData");
	484	avio_w8(pb, AMF_DATA_TYPE_MIXEDARRAY);
	485	avio_wb32(pb, 2);
	486	put_amf_string(pb, "type");
	487	avio_w8(pb, AMF_DATA_TYPE_STRING);
	488	put_amf_string(pb, "Text");
	489	put_amf_string(pb, "text");
	490	avio_w8(pb, AMF_DATA_TYPE_STRING);
	491	put_amf_string(pb, pkt->data);
	492	put_amf_string(pb, "");
	493	avio_w8(pb, AMF_END_OF_OBJECT);
	494	/* write total size of tag */
	495	data_size = avio_tell(pb) - metadata_size_pos;
	496	avio_seek(pb, metadata_size_pos - 10, SEEK_SET);
	497	avio_wb24(pb, data_size);
	498	avio_seek(pb, data_size + 10 - 3, SEEK_CUR);
	499	avio_wb32(pb, data_size + 11);
	500	} else {
77eb5504	501	avio_w8(pb,flags);
09d8c0ae	502	if (enc->codec_id == CODEC_ID_VP6)
77eb5504	503	avio_w8(pb,0);
09d8c0ae	504	if (enc->codec_id == CODEC_ID_VP6F)
77eb5504	505	avio_w8(pb, enc->extradata_size ? enc->extradata[0] : 0);
f23496b5	506	else if (enc->codec_id == CODEC_ID_AAC)
77eb5504	507	avio_w8(pb,1); // AAC raw
f23496b5	508	else if (enc->codec_id == CODEC_ID_H264) {
77eb5504 AK	509	avio_w8(pb,1); // AVC NALU
77eb5504 AK	510	avio_wb24(pb,pkt->pts - pkt->dts);
f23496b5	511	}
71e685b0	512
77eb5504	513	avio_write(pb, data ? data : pkt->data, size);
71e685b0	514
77eb5504	515	avio_wb32(pb,size+flags_size+11); // previous tag size
905de119	516	flv->duration = FFMAX(flv->duration, pkt->pts + flv->delay + pkt->duration);
21e2dc9f	517	}
b7f2fdde	518	avio_flush(pb);
71e685b0 BC	519
	520	av_free(data);
	521
0e28e9ca	522	return pb->error;
d4f5d74a GM	523	}
d4f5d74a GM	524
c6610a21	525	AVOutputFormat ff_flv_muxer = {
dfc2c4d9 AK	526	.name = "flv",
	527	.long_name = NULL_IF_CONFIG_SMALL("FLV format"),
	528	.mime_type = "video/x-flv",
	529	.extensions = "flv",
	530	.priv_data_size = sizeof(FLVContext),
b250f9c6	531	#if CONFIG_LIBMP3LAME
dfc2c4d9	532	.audio_codec = CODEC_ID_MP3,
6ebe07fb	533	#else // CONFIG_LIBMP3LAME
dfc2c4d9	534	.audio_codec = CODEC_ID_ADPCM_SWF,
6ebe07fb	535	#endif // CONFIG_LIBMP3LAME
dfc2c4d9 AK	536	.video_codec = CODEC_ID_FLV1,
	537	.write_header = flv_write_header,
	538	.write_packet = flv_write_packet,
	539	.write_trailer = flv_write_trailer,
20234a4b MS	540	.codec_tag = (const AVCodecTag* const []){
	541	flv_video_codec_ids, flv_audio_codec_ids, 0
	542	},
e9cef897 JZ	543	.flags = AVFMT_GLOBALHEADER \| AVFMT_VARIABLE_FPS \|
e9cef897 JZ	544	AVFMT_TS_NONSTRICT,
d4f5d74a	545	};