movenc.c 27.7 KB
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/*
 * MOV, 3GP, MP4 encoder.
 * Copyright (c) 2003 Thomas Raivio.
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 * Enhancements by Gildas Bazin <gbazin@netcourrier.com>
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 *
 * 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"
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#include "avi.h"
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#include "avio.h"
#include <time.h>

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#undef NDEBUG
#include <assert.h>

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#define MOV_INDEX_CLUSTER_SIZE 16384
#define globalTimescale 1000

typedef struct MOVIentry {
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    unsigned int flags, pos, size;
    unsigned int samplesInChunk;
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    char         key_frame;
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    unsigned int entries;
} MOVIentry;

typedef struct MOVIndex {
    int         entry;
    int         mdat_size;
    int         ents_allocated;
    long        timescale;
    long        time;
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    long        trackDuration;
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    long        sampleCount;
    long        sampleDuration;
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    int         hasKeyframes;
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    int         trackID;
    AVCodecContext *enc;

    int         vosLen;
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    uint8_t     *vosData;
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    MOVIentry** cluster;
} MOVTrack;

typedef struct {
    long    time;
    int     nb_streams;
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    int     mdat_written;
    offset_t mdat_pos;
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    offset_t movi_list;
    long    timescale;
    MOVTrack tracks[MAX_STREAMS];
} MOVContext;

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static int mov_write_esds_tag(ByteIOContext *pb, MOVTrack* track);

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//FIXME supprt 64bit varaint with wide placeholders
static int updateSize (ByteIOContext *pb, int pos)
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{
    long curpos = url_ftell(pb);
    url_fseek(pb, pos, SEEK_SET);
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    put_be32(pb, curpos - pos); /* rewrite size */
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    url_fseek(pb, curpos, SEEK_SET);
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    return curpos - pos;
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}

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/* Chunk offset atom */
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static int mov_write_stco_tag(ByteIOContext *pb, MOVTrack* track)
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{
    int i;
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    int pos = url_ftell(pb);
    put_be32(pb, 0); /* size */
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    put_tag(pb, "stco");
    put_be32(pb, 0); /* version & flags */
    put_be32(pb, track->entry); /* entry count */
    for (i=0; i<track->entry; i++) {
        int cl = i / MOV_INDEX_CLUSTER_SIZE;
        int id = i % MOV_INDEX_CLUSTER_SIZE;
        put_be32(pb, track->cluster[cl][id].pos);
    }
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    return updateSize (pb, pos);
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}

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/* Sample size atom */
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static int mov_write_stsz_tag(ByteIOContext *pb, MOVTrack* track)
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{
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    int equalChunks = 1;
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    int i, j, entries = 0, tst = -1, oldtst = -1;
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    int pos = url_ftell(pb);
    put_be32(pb, 0); /* size */
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    put_tag(pb, "stsz");
    put_be32(pb, 0); /* version & flags */

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    for (i=0; i<track->entry; i++) {
        int cl = i / MOV_INDEX_CLUSTER_SIZE;
        int id = i % MOV_INDEX_CLUSTER_SIZE;
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        tst = track->cluster[cl][id].size/track->cluster[cl][id].entries;
        if(oldtst != -1 && tst != oldtst) {
            equalChunks = 0;
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        }
        oldtst = tst;
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        entries += track->cluster[cl][id].entries;
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    }
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    if (equalChunks) {
        int sSize = track->cluster[0][0].size/track->cluster[0][0].entries;
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        put_be32(pb, sSize); // sample size 
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        put_be32(pb, entries); // sample count
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    }
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    else {
        put_be32(pb, 0); // sample size 
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        put_be32(pb, entries); // sample count 
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        for (i=0; i<track->entry; i++) {
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            int cl = i / MOV_INDEX_CLUSTER_SIZE;
            int id = i % MOV_INDEX_CLUSTER_SIZE;
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            for ( j=0; j<track->cluster[cl][id].entries; j++) {
                put_be32(pb, track->cluster[cl][id].size /
                         track->cluster[cl][id].entries);
            }
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        }
    }
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    return updateSize (pb, pos);
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}

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/* Sample to chunk atom */
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static int mov_write_stsc_tag(ByteIOContext *pb, MOVTrack* track)
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{
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    int index = 0, oldval = -1, i, entryPos, curpos;

    int pos = url_ftell(pb);
    put_be32(pb, 0); /* size */
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    put_tag(pb, "stsc");
    put_be32(pb, 0); // version & flags 
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    entryPos = url_ftell(pb);
    put_be32(pb, track->entry); // entry count 
    for (i=0; i<track->entry; i++) {
        int cl = i / MOV_INDEX_CLUSTER_SIZE;
        int id = i % MOV_INDEX_CLUSTER_SIZE;
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        if(oldval != track->cluster[cl][id].samplesInChunk)
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        {
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            put_be32(pb, i+1); // first chunk 
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            put_be32(pb, track->cluster[cl][id].samplesInChunk); // samples per chunk
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            put_be32(pb, 0x1); // sample description index 
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            oldval = track->cluster[cl][id].samplesInChunk;
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            index++;
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        }
    }
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    curpos = url_ftell(pb);
    url_fseek(pb, entryPos, SEEK_SET);
    put_be32(pb, index); // rewrite size 
    url_fseek(pb, curpos, SEEK_SET);
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    return updateSize (pb, pos);
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}

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/* Sync sample atom */
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static int mov_write_stss_tag(ByteIOContext *pb, MOVTrack* track)
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{
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    long curpos;
    int i, index = 0, entryPos;
    int pos = url_ftell(pb);
    put_be32(pb, 0); // size 
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    put_tag(pb, "stss");
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    put_be32(pb, 0); // version & flags 
    entryPos = url_ftell(pb);
    put_be32(pb, track->entry); // entry count 
    for (i=0; i<track->entry; i++) {
        int cl = i / MOV_INDEX_CLUSTER_SIZE;
        int id = i % MOV_INDEX_CLUSTER_SIZE;
        if(track->cluster[cl][id].key_frame == 1) {
            put_be32(pb, i+1);
            index++;
        }
    }
    curpos = url_ftell(pb);
    url_fseek(pb, entryPos, SEEK_SET);
    put_be32(pb, index); // rewrite size 
    url_fseek(pb, curpos, SEEK_SET);
    return updateSize (pb, pos);
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}

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static int mov_write_damr_tag(ByteIOContext *pb)
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{
    put_be32(pb, 0x11); /* size */
    put_tag(pb, "damr");
    put_tag(pb, "FFMP");
    put_byte(pb, 0);
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    put_be16(pb, 0x80); /* Mode set (all modes for AMR_NB) */
    put_be16(pb, 0xa); /* Mode change period (no restriction) */
    //put_be16(pb, 0x81ff); /* Mode set (all modes for AMR_NB) */
    //put_be16(pb, 1); /* Mode change period (no restriction) */
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    return 0x11;
}

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static int mov_write_audio_tag(ByteIOContext *pb, MOVTrack* track)
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{
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    int pos = url_ftell(pb);
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    put_be32(pb, 0); /* size */
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    if(track->enc->codec_id == CODEC_ID_PCM_MULAW)
      put_tag(pb, "ulaw");
    else if(track->enc->codec_id == CODEC_ID_PCM_ALAW)
      put_tag(pb, "alaw");
    else if(track->enc->codec_id == CODEC_ID_ADPCM_IMA_QT)
      put_tag(pb, "ima4");
    else if(track->enc->codec_id == CODEC_ID_MACE3)
      put_tag(pb, "MAC3");
    else if(track->enc->codec_id == CODEC_ID_MACE6)
      put_tag(pb, "MAC6");
    else if(track->enc->codec_id == CODEC_ID_AAC)
      put_tag(pb, "mp4a");
    else if(track->enc->codec_id == CODEC_ID_AMR_NB)
      put_tag(pb, "samr");
    else
      put_tag(pb, "    ");

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    put_be32(pb, 0); /* Reserved */
    put_be16(pb, 0); /* Reserved */
    put_be16(pb, 1); /* Data-reference index, XXX  == 1 */
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    /* SoundDescription */
    put_be16(pb, 0); /* Version */
    put_be16(pb, 0); /* Revision level */
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    put_be32(pb, 0); /* Reserved */

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    put_be16(pb, track->enc->channels); /* Number of channels */
    /* TODO: Currently hard-coded to 16-bit, there doesn't seem
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                 to be a good way to get number of bits of audio */
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    put_be16(pb, 0x10); /* Reserved */
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    put_be16(pb, 0); /* compression ID (= 0) */
    put_be16(pb, 0); /* packet size (= 0) */
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    put_be16(pb, track->timescale); /* Time scale */
    put_be16(pb, 0); /* Reserved */

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    if(track->enc->codec_id == CODEC_ID_AAC)
        mov_write_esds_tag(pb, track);
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    if(track->enc->codec_id == CODEC_ID_AMR_NB)
        mov_write_damr_tag(pb);
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    return updateSize (pb, pos);
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}

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static int mov_write_d263_tag(ByteIOContext *pb)
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{
    put_be32(pb, 0xf); /* size */
    put_tag(pb, "d263");
    put_tag(pb, "FFMP");
    put_be16(pb, 0x0a);
    put_byte(pb, 0);
    return 0xf;
}

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/* TODO: No idea about these values */
static int mov_write_svq3_tag(ByteIOContext *pb)
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{
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    put_be32(pb, 0x15);
    put_tag(pb, "SMI ");
    put_tag(pb, "SEQH");
    put_be32(pb, 0x5);
    put_be32(pb, 0xe2c0211d);
    put_be32(pb, 0xc0000000);
    put_byte(pb, 0);   
    return 0x15;
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}

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static unsigned int descrLength(unsigned int len)
{
    if (len < 0x00000080)
        return 2 + len;
    else if (len < 0x00004000)
        return 3 + len;
    else if(len < 0x00200000)
        return 4 + len;
    else
        return 5 + len;
}

static void putDescr(ByteIOContext *pb, int tag, int size)
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{
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    uint32_t len;
    uint8_t  vals[4];

    len = size;
    vals[3] = (uint8_t)(len & 0x7f);
    len >>= 7;
    vals[2] = (uint8_t)((len & 0x7f) | 0x80); 
    len >>= 7;
    vals[1] = (uint8_t)((len & 0x7f) | 0x80); 
    len >>= 7;
    vals[0] = (uint8_t)((len & 0x7f) | 0x80);

    put_byte(pb, tag); // DescriptorTag

    if (size < 0x00000080)
    {
        put_byte(pb, vals[3]);
    }
    else if (size < 0x00004000)
    {
        put_byte(pb, vals[2]);
        put_byte(pb, vals[3]);
    }
    else if (size < 0x00200000)
    {
        put_byte(pb, vals[1]);
        put_byte(pb, vals[2]);
        put_byte(pb, vals[3]);
    }
    else if (size < 0x10000000)
    {
        put_byte(pb, vals[0]);
        put_byte(pb, vals[1]);
        put_byte(pb, vals[2]);
        put_byte(pb, vals[3]);
    }
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}

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static int mov_write_esds_tag(ByteIOContext *pb, MOVTrack* track) // Basic
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{
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    int decoderSpecificInfoLen = track->vosLen ? descrLength(track->vosLen):0;
    int pos = url_ftell(pb);

    put_be32(pb, 0);               // size
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    put_tag(pb, "esds");
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    put_be32(pb, 0);               // Version
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    // ES descriptor
    putDescr(pb, 0x03, 3 + descrLength(13 + decoderSpecificInfoLen) +
             descrLength(1));
    put_be16(pb, 0x0001);          // ID (= 1)
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    put_byte(pb, 0x00);            // flags (= no flags)

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    // DecoderConfig descriptor
    putDescr(pb, 0x04, 13 + decoderSpecificInfoLen);

    if(track->enc->codec_id == CODEC_ID_AAC)
        put_byte(pb, 0x40);        // Object type indication
    else if(track->enc->codec_id == CODEC_ID_MPEG4)
        put_byte(pb, 0x20);        // Object type indication (Visual 14496-2)

    if(track->enc->codec_type == CODEC_TYPE_AUDIO)
        put_byte(pb, 0x15);            // flags (= Audiostream)
    else
        put_byte(pb, 0x11);            // flags (= Visualstream)

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    put_byte(pb, 0x0);             // Buffersize DB (24 bits)
    put_be16(pb, 0x0dd2);          // Buffersize DB

    // TODO: find real values for these
    put_be32(pb, 0x0002e918);     // maxbitrate
    put_be32(pb, 0x00017e6b);     // avg bitrate

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    if (track->vosLen)
    {
        // DecoderSpecific info descriptor
        putDescr(pb, 0x05, track->vosLen);
        put_buffer(pb, track->vosData, track->vosLen);
    }

    // SL descriptor
    putDescr(pb, 0x06, descrLength(1));
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    put_byte(pb, 0x02);
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    return updateSize (pb, pos);
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}

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static int mov_write_video_tag(ByteIOContext *pb, MOVTrack* track)
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{
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    int pos = url_ftell(pb);
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    put_be32(pb, 0); /* size */
    if(track->enc->codec_id == CODEC_ID_SVQ1)
      put_tag(pb, "SVQ1");
    else if(track->enc->codec_id == CODEC_ID_SVQ3)
      put_tag(pb, "SVQ3");
    else if(track->enc->codec_id == CODEC_ID_MPEG4)
      put_tag(pb, "mp4v");
    else if(track->enc->codec_id == CODEC_ID_H263)
      put_tag(pb, "s263");
    else
      put_tag(pb, "    "); /* Unknown tag */
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    put_be32(pb, 0); /* Reserved */
    put_be16(pb, 0); /* Reserved */
    put_be16(pb, 1); /* Data-reference index */

    put_be32(pb, 0); /* Reserved (= 02000c) */
    put_be32(pb, 0); /* Reserved ("SVis")*/
    put_be32(pb, 0); /* Reserved */
    put_be32(pb, 0); /* Reserved (400)*/
    put_be16(pb, track->enc->width); /* Video width */
    put_be16(pb, track->enc->height); /* Video height */
    put_be32(pb, 0x00480000); /* Reserved */
    put_be32(pb, 0x00480000); /* Reserved */
    put_be32(pb, 0); /* Reserved */
    put_be32(pb, 0); /* Reserved */
    put_be32(pb, 0); /* Reserved */
    put_be32(pb, 0); /* Reserved */
    put_be32(pb, 0); /* Reserved */
    put_be32(pb, 0); /* Reserved */

    put_be16(pb, 0); /* Reserved */
    put_be32(pb, 0); /* Reserved */
    put_be32(pb, 0); /* Reserved */
    put_be32(pb, 0); /* Reserved */
    put_be16(pb, 0x18); /* Reserved */
    put_be16(pb, 0xffff); /* Reserved */
    if(track->enc->codec_id == CODEC_ID_MPEG4)
        mov_write_esds_tag(pb, track);
    else if(track->enc->codec_id == CODEC_ID_H263)
        mov_write_d263_tag(pb);
    else if(track->enc->codec_id == CODEC_ID_SVQ3)
        mov_write_svq3_tag(pb);    

    return updateSize (pb, pos);
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}

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static int mov_write_stsd_tag(ByteIOContext *pb, MOVTrack* track)
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{
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    int pos = url_ftell(pb);
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    put_be32(pb, 0); /* size */
    put_tag(pb, "stsd");
    put_be32(pb, 0); /* version & flags */
    put_be32(pb, 1); /* entry count */
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    if (track->enc->codec_type == CODEC_TYPE_VIDEO)
        mov_write_video_tag(pb, track);
    else if (track->enc->codec_type == CODEC_TYPE_AUDIO)
        mov_write_audio_tag(pb, track);
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    return updateSize(pb, pos);
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}

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/* TODO?: Currently all samples/frames seem to have same duration */
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/* Time to sample atom */
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static int mov_write_stts_tag(ByteIOContext *pb, MOVTrack* track)
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{
    put_be32(pb, 0x18); /* size */
    put_tag(pb, "stts");
    put_be32(pb, 0); /* version & flags */
    put_be32(pb, 1); /* entry count */

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    put_be32(pb, track->sampleCount); /* sample count */
    put_be32(pb, track->sampleDuration); /* sample duration */
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    return 0x18;
}

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static int mov_write_dref_tag(ByteIOContext *pb)
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{
    put_be32(pb, 28); /* size */
    put_tag(pb, "dref");
    put_be32(pb, 0); /* version & flags */
    put_be32(pb, 1); /* entry count */

    put_be32(pb, 0xc); /* size */
    put_tag(pb, "url ");
    put_be32(pb, 1); /* version & flags */

    return 28;
}

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static int mov_write_stbl_tag(ByteIOContext *pb, MOVTrack* track)
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{
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    int pos = url_ftell(pb);
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    put_be32(pb, 0); /* size */
    put_tag(pb, "stbl");
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    mov_write_stsd_tag(pb, track);
    mov_write_stts_tag(pb, track);
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    if (track->enc->codec_type == CODEC_TYPE_VIDEO &&
        track->hasKeyframes)
        mov_write_stss_tag(pb, track);
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    mov_write_stsc_tag(pb, track);
    mov_write_stsz_tag(pb, track);
    mov_write_stco_tag(pb, track);
    return updateSize(pb, pos);
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}

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static int mov_write_dinf_tag(ByteIOContext *pb)
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{
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    int pos = url_ftell(pb);
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    put_be32(pb, 0); /* size */
    put_tag(pb, "dinf");
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    mov_write_dref_tag(pb);
    return updateSize(pb, pos);
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}

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static int mov_write_smhd_tag(ByteIOContext *pb)
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{
    put_be32(pb, 16); /* size */
    put_tag(pb, "smhd");
    put_be32(pb, 0); /* version & flags */
    put_be16(pb, 0); /* reserved (balance, normally = 0) */
    put_be16(pb, 0); /* reserved */
    return 16;
}

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static int mov_write_vmhd_tag(ByteIOContext *pb)
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{
    put_be32(pb, 0x14); /* size (always 0x14) */
    put_tag(pb, "vmhd");
    put_be32(pb, 0x01); /* version & flags */
    put_be64(pb, 0); /* reserved (graphics mode = copy) */
    return 0x14;
}

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static int mov_write_minf_tag(ByteIOContext *pb, MOVTrack* track)
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{
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    int pos = url_ftell(pb);
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    put_be32(pb, 0); /* size */
    put_tag(pb, "minf");
    if(track->enc->codec_type == CODEC_TYPE_VIDEO)
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        mov_write_vmhd_tag(pb);
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    else
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        mov_write_smhd_tag(pb);
    mov_write_dinf_tag(pb);
    mov_write_stbl_tag(pb, track);
    return updateSize(pb, pos);
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}

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static int mov_write_hdlr_tag(ByteIOContext *pb, MOVTrack* track)
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{
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    char *str;
    int pos = url_ftell(pb);
    put_be32(pb, 0); /* size */
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    put_tag(pb, "hdlr");
    put_be32(pb, 0); /* Version & flags */
    put_be32(pb, 0); /* reserved */
    if(track->enc->codec_type == CODEC_TYPE_VIDEO)
        put_tag(pb, "vide"); /* handler type */
    else
        put_tag(pb, "soun"); /* handler type */
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    put_be32(pb ,0); /* reserved */
    put_be32(pb ,0); /* reserved */
    put_be32(pb ,0); /* reserved */
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    if(track->enc->codec_type == CODEC_TYPE_VIDEO)
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        str = "VideoHandler";
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    else
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        str = "SoundHandler";
    put_byte(pb, strlen(str)); /* string counter */
    put_buffer(pb, str, strlen(str));
    return updateSize(pb, pos);
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}

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static int mov_write_mdhd_tag(ByteIOContext *pb, MOVTrack* track)
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{
    put_be32(pb, 32); /* size */
    put_tag(pb, "mdhd");
    put_be32(pb, 0); /* Version & flags */
    put_be32(pb, track->time); /* creation time */
    put_be32(pb, track->time); /* modification time */
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    put_be32(pb, track->timescale); /* time scale (sample rate for audio) */ 
    put_be32(pb, track->trackDuration); /* duration */
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    put_be16(pb, 0); /* language, 0 = english */
    put_be16(pb, 0); /* reserved (quality) */
    return 32;
}

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static int mov_write_mdia_tag(ByteIOContext *pb, MOVTrack* track)
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{
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    int pos = url_ftell(pb);
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    put_be32(pb, 0); /* size */
    put_tag(pb, "mdia");
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    mov_write_mdhd_tag(pb, track);
    mov_write_hdlr_tag(pb, track);
    mov_write_minf_tag(pb, track);
    return updateSize(pb, pos);
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}

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static int mov_write_tkhd_tag(ByteIOContext *pb, MOVTrack* track)
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{
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    int64_t maxTrackLenTemp;
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    put_be32(pb, 0x5c); /* size (always 0x5c) */
    put_tag(pb, "tkhd");
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    put_be32(pb, 0xf); /* version & flags (track enabled) */
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    put_be32(pb, track->time); /* creation time */
    put_be32(pb, track->time); /* modification time */
    put_be32(pb, track->trackID); /* track-id */
    put_be32(pb, 0); /* reserved */
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    maxTrackLenTemp = ((int64_t)globalTimescale*(int64_t)track->trackDuration)/(int64_t)track->timescale;
    put_be32(pb, (long)maxTrackLenTemp); /* duration */
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    put_be32(pb, 0); /* reserved */
    put_be32(pb, 0); /* reserved */
    put_be32(pb, 0x0); /* reserved (Layer & Alternate group) */
    /* Volume, only for audio */
    if(track->enc->codec_type == CODEC_TYPE_AUDIO)
        put_be16(pb, 0x0100);
    else
        put_be16(pb, 0);
    put_be16(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 */

    /* Track width and height, for visual only */
    if(track->enc->codec_type == CODEC_TYPE_VIDEO) {
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        put_be32(pb, track->enc->width*0x10000);
        put_be32(pb, track->enc->height*0x10000);
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    }
    else {
        put_be32(pb, 0);
        put_be32(pb, 0);
    }
    return 0x5c;
}

622
static int mov_write_trak_tag(ByteIOContext *pb, MOVTrack* track)
623
{
624
    int pos = url_ftell(pb);
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    put_be32(pb, 0); /* size */
    put_tag(pb, "trak");
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    mov_write_tkhd_tag(pb, track);
    mov_write_mdia_tag(pb, track);
    return updateSize(pb, pos);
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}

/* TODO: Not sorted out, but not necessary either */
633
static int mov_write_iods_tag(ByteIOContext *pb, MOVContext *mov)
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{
    put_be32(pb, 0x15); /* size */
    put_tag(pb, "iods");
    put_be32(pb, 0);    /* version & flags */
    put_be16(pb, 0x1007);
    put_byte(pb, 0);
    put_be16(pb, 0x4fff);
    put_be16(pb, 0xfffe);
    put_be16(pb, 0x01ff);
    return 0x15;
}

646
static int mov_write_mvhd_tag(ByteIOContext *pb, MOVContext *mov)
647 648
{
    int maxTrackID = 1, maxTrackLen = 0, i;
649
    int64_t maxTrackLenTemp;
650 651 652 653 654 655 656 657 658

    put_be32(pb, 0x6c); /* size (always 0x6c) */
    put_tag(pb, "mvhd");
    put_be32(pb, 0); /* version & flags */
    put_be32(pb, mov->time); /* creation time */
    put_be32(pb, mov->time); /* modification time */
    put_be32(pb, mov->timescale); /* timescale */
    for (i=0; i<MAX_STREAMS; i++) {
        if(mov->tracks[i].entry > 0) {
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            maxTrackLenTemp = ((int64_t)globalTimescale*(int64_t)mov->tracks[i].trackDuration)/(int64_t)mov->tracks[i].timescale;
            if(maxTrackLen < maxTrackLenTemp)
                maxTrackLen = maxTrackLenTemp;
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            if(maxTrackID < mov->tracks[i].trackID)
                maxTrackID = mov->tracks[i].trackID;
        }
    }
    put_be32(pb, maxTrackLen); /* duration of longest track */

    put_be32(pb, 0x00010000); /* reserved (preferred rate) 1.0 = normal */
    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;
}

695
static int mov_write_moov_tag(ByteIOContext *pb, MOVContext *mov)
696
{
697
    int pos, i;
698 699 700 701 702 703
    pos = url_ftell(pb);
    put_be32(pb, 0); /* size placeholder*/
    put_tag(pb, "moov");
    mov->timescale = globalTimescale;

    for (i=0; i<MAX_STREAMS; i++) {
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        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;
715
            }
716 717 718
            else {
                mov->tracks[i].timescale = mov->tracks[i].enc->sample_rate;
                mov->tracks[i].sampleDuration = mov->tracks[i].enc->frame_size;
719 720
            }
        }
721 722 723 724 725

        mov->tracks[i].trackDuration = 
            mov->tracks[i].sampleCount * mov->tracks[i].sampleDuration;
        mov->tracks[i].time = mov->time;
        mov->tracks[i].trackID = i+1;
726 727
    }

728 729
    mov_write_mvhd_tag(pb, mov);
    //mov_write_iods_tag(pb, mov);
730 731
    for (i=0; i<MAX_STREAMS; i++) {
        if(mov->tracks[i].entry > 0) {
732
            mov_write_trak_tag(pb, &(mov->tracks[i]));
733 734 735
        }
    }

736
    return updateSize(pb, pos);
737 738
}

739
int mov_write_mdat_tag(ByteIOContext *pb, MOVContext* mov)
740
{
741
    mov->mdat_pos = url_ftell(pb); 
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    put_be32(pb, 0); /* size placeholder*/
    put_tag(pb, "mdat");
    return 0;
}

/* TODO: This needs to be more general */
748
int mov_write_ftyp_tag(ByteIOContext *pb, AVFormatContext *s)
749 750 751
{
    put_be32(pb, 0x14 ); /* size */
    put_tag(pb, "ftyp");
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    if (!strcmp("3gp", s->oformat->name))
        put_tag(pb, "3gp4");
    else
        put_tag(pb, "isom");

758
    put_be32(pb, 0x200 );
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    if (!strcmp("3gp", s->oformat->name))
        put_tag(pb, "3gp4");
    else
        put_tag(pb, "mp41");

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    return 0x14;
}

static int mov_write_header(AVFormatContext *s)
{
    ByteIOContext *pb = &s->pb;

772
    if(s->oformat != NULL) {
773 774
    if(!strcmp("3gp", s->oformat->name) || !strcmp("mp4", s->oformat->name))
        mov_write_ftyp_tag(pb,s);
775 776
    }

777 778 779 780 781 782 783 784 785 786 787 788
    put_flush_packet(pb);

    return 0;
}

static int Timestamp() {
    time_t ltime;
    time ( &ltime );
    return ltime+(24107*86400);
}

static int mov_write_packet(AVFormatContext *s, int stream_index,
789
                            const uint8_t *buf, int size, int64_t pts)
790 791 792
{
    MOVContext *mov = s->priv_data;
    ByteIOContext *pb = &s->pb;
793 794
    AVCodecContext *enc = &s->streams[stream_index]->codec;
    MOVTrack* trk = &mov->tracks[stream_index];
795
    int cl, id;
796
    unsigned int samplesInChunk = 0;
797

798 799
    if (url_is_streamed(&s->pb)) return 0; /* Can't handle that */
    if (!size) return 0; /* Discard 0 sized packets */
800

801 802 803 804 805
    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) {
806
            /* We must find out how many AMR blocks there are in one packet */
807 808 809 810 811 812 813
            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++;
814
            }
815
        }
816 817
        else if(enc->codec_id == CODEC_ID_PCM_ALAW) {
            samplesInChunk = size/enc->channels;
818
        }
819 820
        else {
            samplesInChunk = 1;
821
        }
822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857
    }

    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 = Timestamp();
    }

    trk->cluster[cl][id].pos = url_ftell(pb) - mov->movi_list;
    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)
858
            trk->hasKeyframes = 1;
859
    }
860 861 862 863 864
    trk->enc = enc;
    trk->entry++;
    trk->sampleCount += samplesInChunk;
    trk->mdat_size += size;

865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887
    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 file_size;

    file_size = url_ftell(pb);
    j = 0;

    /* Write size of mdat tag */
    for (i=0; i<MAX_STREAMS; i++) {
        if(mov->tracks[i].ents_allocated > 0) {
            j += mov->tracks[i].mdat_size;
        }
    }
888
    url_fseek(pb, mov->mdat_pos, SEEK_SET);
889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912
    put_be32(pb, j+8);
    url_fseek(pb, file_size, SEEK_SET);

    mov_write_moov_tag(pb, mov);

    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);
        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),
913
    CODEC_ID_PCM_ALAW,
914
    CODEC_ID_MPEG4,
915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935
    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",
936 937
    "application/mp4",
    "mp4,m4a",
938 939 940 941 942 943 944 945 946 947 948 949 950 951 952
    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;
}