put_be16(pb, 0x0100); /* reserved (preferred volume) 1.0 = normal */    put_be16(pb, 0); /* reserved */    put_be32(pb, 0); /* reserved */    put_be32(pb, 0); /* reserved */    /* Matrix structure */    put_be32(pb, 0x00010000); /* reserved */    put_be32(pb, 0x0); /* reserved */    put_be32(pb, 0x0); /* reserved */    put_be32(pb, 0x0); /* reserved */    put_be32(pb, 0x00010000); /* reserved */    put_be32(pb, 0x0); /* reserved */    put_be32(pb, 0x0); /* reserved */    put_be32(pb, 0x0); /* reserved */    put_be32(pb, 0x40000000); /* reserved */    put_be32(pb, 0); /* reserved (preview time) */    put_be32(pb, 0); /* reserved (preview duration) */    put_be32(pb, 0); /* reserved (poster time) */    put_be32(pb, 0); /* reserved (selection time) */    put_be32(pb, 0); /* reserved (selection duration) */    put_be32(pb, 0); /* reserved (current time) */    put_be32(pb, maxTrackID+1); /* Next track id */    return 0x6c;}static int mov_write_udta_tag(ByteIOContext *pb, MOVContext* mov,                              AVFormatContext *s){    int pos = url_ftell(pb);    int i;    put_be32(pb, 0); /* size */    put_tag(pb, "udta");    /* Requirements */    for (i=0; i<MAX_STREAMS; i++) {        if(mov->tracks[i].entry <= 0) continue;        if (mov->tracks[i].enc->codec_id == CODEC_ID_AAC ||            mov->tracks[i].enc->codec_id == CODEC_ID_MPEG4) {            int pos = url_ftell(pb);            put_be32(pb, 0); /* size */            put_tag(pb, "\251req");            put_be16(pb, sizeof("QuickTime 6.0 or greater") - 1);            put_be16(pb, 0);            put_buffer(pb, "QuickTime 6.0 or greater",                       sizeof("QuickTime 6.0 or greater") - 1);            updateSize(pb, pos);            break;        }    }    /* Encoder */    if(!(mov->tracks[0].enc->flags & CODEC_FLAG_BITEXACT))    {        int pos = url_ftell(pb);        put_be32(pb, 0); /* size */        put_tag(pb, "\251enc");        put_be16(pb, sizeof(LIBAVFORMAT_IDENT) - 1); /* string length */        put_be16(pb, 0);        put_buffer(pb, LIBAVFORMAT_IDENT, sizeof(LIBAVFORMAT_IDENT) - 1);        updateSize(pb, pos);    }    if( s->title[0] )    {        int pos = url_ftell(pb);        put_be32(pb, 0); /* size */        put_tag(pb, "\251nam");        put_be16(pb, strlen(s->title)); /* string length */        put_be16(pb, 0);        put_buffer(pb, s->title, strlen(s->title));        updateSize(pb, pos);    }    if( s->author[0] )    {        int pos = url_ftell(pb);        put_be32(pb, 0); /* size */        put_tag(pb, /*"\251aut"*/ "\251day" );        put_be16(pb, strlen(s->author)); /* string length */        put_be16(pb, 0);        put_buffer(pb, s->author, strlen(s->author));        updateSize(pb, pos);    }    if( s->comment[0] )    {        int pos = url_ftell(pb);        put_be32(pb, 0); /* size */        put_tag(pb, "\251des");        put_be16(pb, strlen(s->comment)); /* string length */        put_be16(pb, 0);        put_buffer(pb, s->comment, strlen(s->comment));        updateSize(pb, pos);    }    return updateSize(pb, pos);}static int mov_write_moov_tag(ByteIOContext *pb, MOVContext *mov,                              AVFormatContext *s){    int pos, i;    pos = url_ftell(pb);    put_be32(pb, 0); /* size placeholder*/    put_tag(pb, "moov");    mov->timescale = globalTimescale;    for (i=0; i<MAX_STREAMS; i++) {        if(mov->tracks[i].entry <= 0) continue;        if(mov->tracks[i].enc->codec_type == CODEC_TYPE_VIDEO) {            mov->tracks[i].timescale = mov->tracks[i].enc->frame_rate;            mov->tracks[i].sampleDuration = mov->tracks[i].enc->frame_rate_base;        }        else if(mov->tracks[i].enc->codec_type == CODEC_TYPE_AUDIO) {            /* If AMR, track timescale = 8000, AMR_WB = 16000 */            if(mov->tracks[i].enc->codec_id == CODEC_ID_AMR_NB) {                mov->tracks[i].sampleDuration = 160;  // Bytes per chunk                mov->tracks[i].timescale = 8000;            }            else {                mov->tracks[i].timescale = mov->tracks[i].enc->sample_rate;                mov->tracks[i].sampleDuration = mov->tracks[i].enc->frame_size;            }        }        mov->tracks[i].trackDuration =             mov->tracks[i].sampleCount * mov->tracks[i].sampleDuration;        mov->tracks[i].time = mov->time;        mov->tracks[i].trackID = i+1;    }    mov_write_mvhd_tag(pb, mov);    //mov_write_iods_tag(pb, mov);    for (i=0; i<MAX_STREAMS; i++) {        if(mov->tracks[i].entry > 0) {            mov_write_trak_tag(pb, &(mov->tracks[i]));        }    }    mov_write_udta_tag(pb, mov, s);    return updateSize(pb, pos);}int mov_write_mdat_tag(ByteIOContext *pb, MOVContext* mov){    mov->mdat_pos = url_ftell(pb);     put_be32(pb, 0); /* size placeholder*/    put_tag(pb, "mdat");    return 0;}/* TODO: This needs to be more general */int mov_write_ftyp_tag(ByteIOContext *pb, AVFormatContext *s){    MOVContext *mov = s->priv_data;    put_be32(pb, 0x14 ); /* size */    put_tag(pb, "ftyp");    if ( mov->mode == MODE_3GP )        put_tag(pb, "3gp4");    else        put_tag(pb, "isom");    put_be32(pb, 0x200 );    if ( mov->mode == MODE_3GP )        put_tag(pb, "3gp4");    else        put_tag(pb, "mp41");    return 0x14;}static int mov_write_header(AVFormatContext *s){    ByteIOContext *pb = &s->pb;    MOVContext *mov = s->priv_data;    int i;    /* Default mode == MP4 */    mov->mode = MODE_MP4;    if (s->oformat != NULL) {        if (!strcmp("3gp", s->oformat->name)) mov->mode = MODE_3GP;        else if (!strcmp("mov", s->oformat->name)) mov->mode = MODE_MOV;        if ( mov->mode == MODE_3GP || mov->mode == MODE_MP4 )            mov_write_ftyp_tag(pb,s);    }    for (i=0; i<MAX_STREAMS; i++) {        mov->tracks[i].mode = mov->mode;    }    put_flush_packet(pb);    return 0;}static int mov_write_packet(AVFormatContext *s, int stream_index,                            const uint8_t *buf, int size, int64_t pts){    MOVContext *mov = s->priv_data;    ByteIOContext *pb = &s->pb;    AVCodecContext *enc = &s->streams[stream_index]->codec;    MOVTrack* trk = &mov->tracks[stream_index];    int cl, id;    unsigned int samplesInChunk = 0;    if (url_is_streamed(&s->pb)) return 0; /* Can't handle that */    if (!size) return 0; /* Discard 0 sized packets */    if (enc->codec_type == CODEC_TYPE_VIDEO ) {        samplesInChunk = 1;    }    else if (enc->codec_type == CODEC_TYPE_AUDIO ) {        if( enc->codec_id == CODEC_ID_AMR_NB) {            /* We must find out how many AMR blocks there are in one packet */            static uint16_t packed_size[16] =                {13, 14, 16, 18, 20, 21, 27, 32, 6, 0, 0, 0, 0, 0, 0, 0};            int len = 0;            while (len < size && samplesInChunk < 100) {                len += packed_size[(buf[len] >> 3) & 0x0F];                samplesInChunk++;            }        }        else if(enc->codec_id == CODEC_ID_PCM_ALAW) {            samplesInChunk = size/enc->channels;        }	else if(enc->codec_id == CODEC_ID_PCM_S16BE || enc->codec_id == CODEC_ID_PCM_S16LE) {	    samplesInChunk = size/(2*enc->channels);        }	            else {            samplesInChunk = 1;        }    }    if ((enc->codec_id == CODEC_ID_MPEG4 || enc->codec_id == CODEC_ID_AAC)        && trk->vosLen == 0) {//        assert(enc->extradata_size);        trk->vosLen = enc->extradata_size;        trk->vosData = av_malloc(trk->vosLen);        memcpy(trk->vosData, enc->extradata, trk->vosLen);    }    cl = trk->entry / MOV_INDEX_CLUSTER_SIZE;    id = trk->entry % MOV_INDEX_CLUSTER_SIZE;    if (trk->ents_allocated <= trk->entry) {        trk->cluster = av_realloc(trk->cluster, (cl+1)*sizeof(void*));         if (!trk->cluster)            return -1;        trk->cluster[cl] = av_malloc(MOV_INDEX_CLUSTER_SIZE*sizeof(MOVIentry));        if (!trk->cluster[cl])            return -1;        trk->ents_allocated += MOV_INDEX_CLUSTER_SIZE;    }    if (mov->mdat_written == 0) {        mov_write_mdat_tag(pb, mov);        mov->mdat_written = 1;        mov->time = s->timestamp;    }    trk->cluster[cl][id].pos = url_ftell(pb);    trk->cluster[cl][id].samplesInChunk = samplesInChunk;    trk->cluster[cl][id].size = size;    trk->cluster[cl][id].entries = samplesInChunk;    if(enc->codec_type == CODEC_TYPE_VIDEO) {        trk->cluster[cl][id].key_frame = enc->coded_frame->key_frame;        if(enc->coded_frame->pict_type == FF_I_TYPE)            trk->hasKeyframes = 1;    }    trk->enc = enc;    trk->entry++;    trk->sampleCount += samplesInChunk;    trk->mdat_size += size;    put_buffer(pb, buf, size);    put_flush_packet(pb);    return 0;}static int mov_write_trailer(AVFormatContext *s){    MOVContext *mov = s->priv_data;    ByteIOContext *pb = &s->pb;    int res = 0;    int i, j;    offset_t moov_pos = url_ftell(pb);    /* Write size of mdat tag */    for (i=0, j=0; i<MAX_STREAMS; i++) {        if(mov->tracks[i].ents_allocated > 0) {            j += mov->tracks[i].mdat_size;        }    }    url_fseek(pb, mov->mdat_pos, SEEK_SET);    put_be32(pb, j+8);    url_fseek(pb, moov_pos, SEEK_SET);    mov_write_moov_tag(pb, mov, s);    for (i=0; i<MAX_STREAMS; i++) {        for (j=0; j<mov->tracks[i].ents_allocated/MOV_INDEX_CLUSTER_SIZE; j++) {            av_free(mov->tracks[i].cluster[j]);        }        av_free(mov->tracks[i].cluster);        if( mov->tracks[i].vosLen ) av_free( mov->tracks[i].vosData );        mov->tracks[i].cluster = NULL;        mov->tracks[i].ents_allocated = mov->tracks[i].entry = 0;    }    put_flush_packet(pb);    return res;}static AVOutputFormat mov_oformat = {    "mov",    "mov format",    NULL,    "mov",    sizeof(MOVContext),    CODEC_ID_AAC,    CODEC_ID_MPEG4,    mov_write_header,    mov_write_packet,    mov_write_trailer,};static AVOutputFormat _3gp_oformat = {    "3gp",    "3gp format",    NULL,    "3gp",    sizeof(MOVContext),    CODEC_ID_AMR_NB,    CODEC_ID_H263,    mov_write_header,    mov_write_packet,    mov_write_trailer,};static AVOutputFormat mp4_oformat = {    "mp4",    "mp4 format",    "application/mp4",    "mp4,m4a",    sizeof(MOVContext),    CODEC_ID_AAC,    CODEC_ID_MPEG4,    mov_write_header,    mov_write_packet,    mov_write_trailer,};int movenc_init(void){    av_register_output_format(&mov_oformat);    av_register_output_format(&_3gp_oformat);    av_register_output_format(&mp4_oformat);    return 0;}