PeerStreamer

/*

 * AVI encoder.

 * Copyright (c) 2000 Fabrice Bellard.

 *

 * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

 */

#include "avformat.h"

#include "avi.h"

/*

 * TODO:

 *  - fill all fields if non streamed (nb_frames for example)

 */

#ifdef CONFIG_MUXERS

typedef struct AVIIentry {

    unsigned int flags, pos, len;

} AVIIentry;

#define AVI_INDEX_CLUSTER_SIZE 16384

typedef struct AVIIndex {

    offset_t    indx_start;

    int         entry;

    int         ents_allocated;

    AVIIentry** cluster;

} AVIIndex;

typedef struct {

    offset_t riff_start, movi_list, odml_list;

    offset_t frames_hdr_all, frames_hdr_strm[MAX_STREAMS];

    int audio_strm_length[MAX_STREAMS];

    int riff_id;

    int packet_count[MAX_STREAMS];

    AVIIndex indexes[MAX_STREAMS];

} AVIContext;

static inline AVIIentry* avi_get_ientry(AVIIndex* idx, int ent_id)

{

    int cl = ent_id / AVI_INDEX_CLUSTER_SIZE;

    int id = ent_id % AVI_INDEX_CLUSTER_SIZE;

    return &idx->cluster[cl][id];

}

offset_t start_tag(ByteIOContext *pb, const char *tag)

{

    put_tag(pb, tag);

    put_le32(pb, 0);

    return url_ftell(pb);

}

void end_tag(ByteIOContext *pb, offset_t start)

{

    offset_t pos;

    pos = url_ftell(pb);

    url_fseek(pb, start - 4, SEEK_SET);

    put_le32(pb, (uint32_t)(pos - start));

    url_fseek(pb, pos, SEEK_SET);

}

#endif //CONFIG_MUXERS

/* Note: when encoding, the first matching tag is used, so order is

   important if multiple tags possible for a given codec. */

const CodecTag codec_bmp_tags[] = {

    { CODEC_ID_H264, MKTAG('H', '2', '6', '4') },

    { CODEC_ID_H264, MKTAG('h', '2', '6', '4') },

    { CODEC_ID_H264, MKTAG('X', '2', '6', '4') },

    { CODEC_ID_H264, MKTAG('x', '2', '6', '4') },

    { CODEC_ID_H264, MKTAG('a', 'v', 'c', '1') },

    { CODEC_ID_H264, MKTAG('V', 'S', 'S', 'H') },

    { CODEC_ID_H263, MKTAG('H', '2', '6', '3') },

    { CODEC_ID_H263P, MKTAG('H', '2', '6', '3') },

    { CODEC_ID_H263I, MKTAG('I', '2', '6', '3') }, /* intel h263 */

    { CODEC_ID_H261, MKTAG('H', '2', '6', '1') },

    /* added based on MPlayer */

    { CODEC_ID_H263P, MKTAG('U', '2', '6', '3') },

    { CODEC_ID_H263P, MKTAG('v', 'i', 'v', '1') },

    { CODEC_ID_MPEG4, MKTAG('F', 'M', 'P', '4')},

    { CODEC_ID_MPEG4, MKTAG('D', 'I', 'V', 'X'), .invalid_asf = 1 },

    { CODEC_ID_MPEG4, MKTAG('D', 'X', '5', '0'), .invalid_asf = 1 },

    { CODEC_ID_MPEG4, MKTAG('X', 'V', 'I', 'D'), .invalid_asf = 1 },

    { CODEC_ID_MPEG4, MKTAG('M', 'P', '4', 'S') },

    { CODEC_ID_MPEG4, MKTAG('M', '4', 'S', '2') },

    { CODEC_ID_MPEG4, MKTAG(0x04, 0, 0, 0) }, /* some broken avi use this */

    /* added based on MPlayer */

    { CODEC_ID_MPEG4, MKTAG('D', 'I', 'V', '1') },

    { CODEC_ID_MPEG4, MKTAG('B', 'L', 'Z', '0') },

    { CODEC_ID_MPEG4, MKTAG('m', 'p', '4', 'v') },

    { CODEC_ID_MPEG4, MKTAG('U', 'M', 'P', '4') },

    { CODEC_ID_MPEG4, MKTAG('W', 'V', '1', 'F') },

    { CODEC_ID_MPEG4, MKTAG('S', 'E', 'D', 'G') },

    { CODEC_ID_MPEG4, MKTAG('R', 'M', 'P', '4') },

    { CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '3'), .invalid_asf = 1 }, /* default signature when using MSMPEG4 */

    { CODEC_ID_MSMPEG4V3, MKTAG('M', 'P', '4', '3') },

    /* added based on MPlayer */

    { CODEC_ID_MSMPEG4V3, MKTAG('M', 'P', 'G', '3') },

    { CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '5') },

    { CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '6') },

    { CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '4') },

    { CODEC_ID_MSMPEG4V3, MKTAG('A', 'P', '4', '1') },

    { CODEC_ID_MSMPEG4V3, MKTAG('C', 'O', 'L', '1') },

    { CODEC_ID_MSMPEG4V3, MKTAG('C', 'O', 'L', '0') },

    { CODEC_ID_MSMPEG4V2, MKTAG('M', 'P', '4', '2') },

    /* added based on MPlayer */

    { CODEC_ID_MSMPEG4V2, MKTAG('D', 'I', 'V', '2') },

    { CODEC_ID_MSMPEG4V1, MKTAG('M', 'P', 'G', '4') },

    { CODEC_ID_WMV1, MKTAG('W', 'M', 'V', '1') },

    /* added based on MPlayer */

    { CODEC_ID_WMV2, MKTAG('W', 'M', 'V', '2') },

    { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 's', 'd') },

    { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', 'd') },

    { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 's', 'l') },

    { CODEC_ID_DVVIDEO, MKTAG('d', 'v', '2', '5') },

    { CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', 'g', '1') },

    { CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', 'g', '2') },

    { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'p', 'g', '2') },

    { CODEC_ID_MPEG2VIDEO, MKTAG('M', 'P', 'E', 'G') },

    { CODEC_ID_MPEG1VIDEO, MKTAG('P', 'I', 'M', '1') },

    { CODEC_ID_MPEG1VIDEO, MKTAG('V', 'C', 'R', '2') },

    { CODEC_ID_MPEG1VIDEO, 0x10000001 },

    { CODEC_ID_MPEG2VIDEO, 0x10000002 },

    { CODEC_ID_MPEG2VIDEO, MKTAG('D', 'V', 'R', ' ') },

    { CODEC_ID_MJPEG, MKTAG('M', 'J', 'P', 'G') },

    { CODEC_ID_MJPEG, MKTAG('L', 'J', 'P', 'G') },

    { CODEC_ID_LJPEG, MKTAG('L', 'J', 'P', 'G') },

    { CODEC_ID_MJPEG, MKTAG('J', 'P', 'G', 'L') }, /* Pegasus lossless JPEG */

    { CODEC_ID_MJPEG, MKTAG('M', 'J', 'L', 'S') }, /* JPEG-LS custom FOURCC for avi - decoder */

    { CODEC_ID_JPEGLS, MKTAG('M', 'J', 'L', 'S') }, /* JPEG-LS custom FOURCC for avi - encoder */

    { CODEC_ID_HUFFYUV, MKTAG('H', 'F', 'Y', 'U') },

    { CODEC_ID_FFVHUFF, MKTAG('F', 'F', 'V', 'H') },

    { CODEC_ID_CYUV, MKTAG('C', 'Y', 'U', 'V') },

    { CODEC_ID_RAWVIDEO, MKTAG('I', '4', '2', '0') },

    { CODEC_ID_RAWVIDEO, MKTAG('Y', 'U', 'Y', '2') },

    { CODEC_ID_RAWVIDEO, MKTAG('Y', '4', '2', '2') },

    { CODEC_ID_RAWVIDEO, MKTAG('U', 'Y', 'V', 'Y') },

    { CODEC_ID_RAWVIDEO, MKTAG('I', 'Y', 'U', 'V') },

    { CODEC_ID_INDEO3, MKTAG('I', 'V', '3', '1') },

    { CODEC_ID_INDEO3, MKTAG('I', 'V', '3', '2') },

    { CODEC_ID_VP3, MKTAG('V', 'P', '3', '1') },

    { CODEC_ID_VP3, MKTAG('V', 'P', '3', '0') },

    { CODEC_ID_ASV1, MKTAG('A', 'S', 'V', '1') },

    { CODEC_ID_ASV2, MKTAG('A', 'S', 'V', '2') },

    { CODEC_ID_VCR1, MKTAG('V', 'C', 'R', '1') },

    { CODEC_ID_FFV1, MKTAG('F', 'F', 'V', '1') },

    { CODEC_ID_XAN_WC4, MKTAG('X', 'x', 'a', 'n') },

    { CODEC_ID_MSRLE, MKTAG('m', 'r', 'l', 'e') },

    { CODEC_ID_MSRLE, MKTAG(0x1, 0x0, 0x0, 0x0) },

    { CODEC_ID_MSVIDEO1, MKTAG('M', 'S', 'V', 'C') },

    { CODEC_ID_MSVIDEO1, MKTAG('m', 's', 'v', 'c') },

    { CODEC_ID_MSVIDEO1, MKTAG('C', 'R', 'A', 'M') },

    { CODEC_ID_MSVIDEO1, MKTAG('c', 'r', 'a', 'm') },

    { CODEC_ID_MSVIDEO1, MKTAG('W', 'H', 'A', 'M') },

    { CODEC_ID_MSVIDEO1, MKTAG('w', 'h', 'a', 'm') },

    { CODEC_ID_CINEPAK, MKTAG('c', 'v', 'i', 'd') },

    { CODEC_ID_TRUEMOTION1, MKTAG('D', 'U', 'C', 'K') },

    { CODEC_ID_MSZH, MKTAG('M', 'S', 'Z', 'H') },

    { CODEC_ID_ZLIB, MKTAG('Z', 'L', 'I', 'B') },

    { CODEC_ID_SNOW, MKTAG('S', 'N', 'O', 'W') },

    { CODEC_ID_4XM, MKTAG('4', 'X', 'M', 'V') },

    { CODEC_ID_FLV1, MKTAG('F', 'L', 'V', '1') },

    { CODEC_ID_SVQ1, MKTAG('s', 'v', 'q', '1') },

    { CODEC_ID_TSCC, MKTAG('t', 's', 'c', 'c') },

    { CODEC_ID_ULTI, MKTAG('U', 'L', 'T', 'I') },

    { CODEC_ID_VIXL, MKTAG('V', 'I', 'X', 'L') },

    { CODEC_ID_QPEG, MKTAG('Q', 'P', 'E', 'G') },

    { CODEC_ID_QPEG, MKTAG('Q', '1', '.', '0') },

    { CODEC_ID_QPEG, MKTAG('Q', '1', '.', '1') },

    { CODEC_ID_WMV3, MKTAG('W', 'M', 'V', '3') },

    { CODEC_ID_LOCO, MKTAG('L', 'O', 'C', 'O') },

    { CODEC_ID_WNV1, MKTAG('W', 'N', 'V', '1') },

    { CODEC_ID_AASC, MKTAG('A', 'A', 'S', 'C') },

    { CODEC_ID_INDEO2, MKTAG('R', 'T', '2', '1') },

    { CODEC_ID_FRAPS, MKTAG('F', 'P', 'S', '1') },

    { CODEC_ID_THEORA, MKTAG('t', 'h', 'e', 'o') },

    { CODEC_ID_TRUEMOTION2, MKTAG('T', 'M', '2', '0') },

    { CODEC_ID_CSCD, MKTAG('C', 'S', 'C', 'D') },

    { CODEC_ID_ZMBV, MKTAG('Z', 'M', 'B', 'V') },

    { CODEC_ID_KMVC, MKTAG('K', 'M', 'V', 'C') },

    { CODEC_ID_RAWVIDEO, 0 },

    { CODEC_ID_NONE, 0 },

};

unsigned int codec_get_tag(const CodecTag *tags, int id)

{

    while (tags->id != CODEC_ID_NONE) {

        if (tags->id == id)

            return tags->tag;

        tags++;

    }

    return 0;

}

static unsigned int codec_get_asf_tag(const CodecTag *tags, unsigned int id)

{

    while (tags->id != CODEC_ID_NONE) {

        if (!tags->invalid_asf && tags->id == id)

            return tags->tag;

        tags++;

    }

    return 0;

}

enum CodecID codec_get_id(const CodecTag *tags, unsigned int tag)

{

    while (tags->id != CODEC_ID_NONE) {

        if(   toupper((tag >> 0)&0xFF) == toupper((tags->tag >> 0)&0xFF)

           && toupper((tag >> 8)&0xFF) == toupper((tags->tag >> 8)&0xFF)

           && toupper((tag >>16)&0xFF) == toupper((tags->tag >>16)&0xFF)

           && toupper((tag >>24)&0xFF) == toupper((tags->tag >>24)&0xFF))

            return tags->id;

        tags++;

    }

    return CODEC_ID_NONE;

}

unsigned int codec_get_bmp_tag(int id)

{

    return codec_get_tag(codec_bmp_tags, id);

}

unsigned int codec_get_wav_tag(int id)

{

    return codec_get_tag(codec_wav_tags, id);

}

enum CodecID codec_get_bmp_id(unsigned int tag)

{

    return codec_get_id(codec_bmp_tags, tag);

}

enum CodecID codec_get_wav_id(unsigned int tag)

{

    return codec_get_id(codec_wav_tags, tag);

}

#ifdef CONFIG_MUXERS

/* BITMAPINFOHEADER header */

void put_bmp_header(ByteIOContext *pb, AVCodecContext *enc, const CodecTag *tags, int for_asf)

{

    put_le32(pb, 40 + enc->extradata_size); /* size */

    put_le32(pb, enc->width);

    put_le32(pb, enc->height);

    put_le16(pb, 1); /* planes */

    put_le16(pb, enc->bits_per_sample ? enc->bits_per_sample : 24); /* depth */

    /* compression type */

    put_le32(pb, for_asf ? (enc->codec_tag ? enc->codec_tag : codec_get_asf_tag(tags, enc->codec_id)) : enc->codec_tag); //

    put_le32(pb, enc->width * enc->height * 3);

    put_le32(pb, 0);

    put_le32(pb, 0);

    put_le32(pb, 0);

    put_le32(pb, 0);

    put_buffer(pb, enc->extradata, enc->extradata_size);

    if (enc->extradata_size & 1)

        put_byte(pb, 0);

}

void ff_parse_specific_params(AVCodecContext *stream, int *au_rate, int *au_ssize, int *au_scale)

{

    int gcd;

    *au_ssize= stream->block_align;

    if(stream->frame_size && stream->sample_rate){

        *au_scale=stream->frame_size;

        *au_rate= stream->sample_rate;

    }else if(stream->codec_type == CODEC_TYPE_VIDEO){

        *au_scale= stream->time_base.num;

        *au_rate = stream->time_base.den;

    }else{

        *au_scale= stream->block_align ? stream->block_align*8 : 8;

        *au_rate = stream->bit_rate;

    }

    gcd= ff_gcd(*au_scale, *au_rate);

    *au_scale /= gcd;

    *au_rate /= gcd;

}

static offset_t avi_start_new_riff(AVIContext *avi, ByteIOContext *pb,

                                   const char* riff_tag, const char* list_tag)

{

    offset_t loff;

    int i;

    avi->riff_id++;

    for (i=0; i<MAX_STREAMS; i++)

         avi->indexes[i].entry = 0;

    avi->riff_start = start_tag(pb, "RIFF");

    put_tag(pb, riff_tag);

    loff = start_tag(pb, "LIST");

    put_tag(pb, list_tag);

    return loff;

}

static unsigned char* avi_stream2fourcc(unsigned char* tag, int index,

                                        enum CodecType type)

{

    tag[0] = '0';

    tag[1] = '0' + index;

    if (type == CODEC_TYPE_VIDEO) {

        tag[2] = 'd';

        tag[3] = 'c';

    } else {

        tag[2] = 'w';

        tag[3] = 'b';

    }

    tag[4] = '\0';

    return tag;

}

static int avi_write_header(AVFormatContext *s)

{

    AVIContext *avi = s->priv_data;

    ByteIOContext *pb = &s->pb;

    int bitrate, n, i, nb_frames, au_byterate, au_ssize, au_scale;

    AVCodecContext *stream, *video_enc;

    offset_t list1, list2, strh, strf;

    /* header list */

    avi->riff_id = 0;

    list1 = avi_start_new_riff(avi, pb, "AVI ", "hdrl");

    /* avi header */

    put_tag(pb, "avih");

    put_le32(pb, 14 * 4);

    bitrate = 0;

    video_enc = NULL;

    for(n=0;n<s->nb_streams;n++) {

        stream = s->streams[n]->codec;

        bitrate += stream->bit_rate;

        if (stream->codec_type == CODEC_TYPE_VIDEO)

            video_enc = stream;

    }

    nb_frames = 0;

    if(video_enc){

        put_le32(pb, (uint32_t)(int64_t_C(1000000) * video_enc->time_base.num / video_enc->time_base.den));

    } else {

        put_le32(pb, 0);

    }

    put_le32(pb, bitrate / 8); /* XXX: not quite exact */

    put_le32(pb, 0); /* padding */

    if (url_is_streamed(pb))

        put_le32(pb, AVIF_TRUSTCKTYPE | AVIF_ISINTERLEAVED); /* flags */

    else

        put_le32(pb, AVIF_TRUSTCKTYPE | AVIF_HASINDEX | AVIF_ISINTERLEAVED); /* flags */

    avi->frames_hdr_all = url_ftell(pb); /* remember this offset to fill later */

    put_le32(pb, nb_frames); /* nb frames, filled later */

    put_le32(pb, 0); /* initial frame */

    put_le32(pb, s->nb_streams); /* nb streams */

    put_le32(pb, 1024 * 1024); /* suggested buffer size */

    if(video_enc){

        put_le32(pb, video_enc->width);

        put_le32(pb, video_enc->height);

    } else {

        put_le32(pb, 0);

        put_le32(pb, 0);

    }

    put_le32(pb, 0); /* reserved */

    put_le32(pb, 0); /* reserved */

    put_le32(pb, 0); /* reserved */

    put_le32(pb, 0); /* reserved */

    /* stream list */

    for(i=0;i<n;i++) {

        list2 = start_tag(pb, "LIST");

        put_tag(pb, "strl");

        stream = s->streams[i]->codec;

        /* FourCC should really be set by the codec itself */

        if (! stream->codec_tag) {

            stream->codec_tag = codec_get_bmp_tag(stream->codec_id);

        }

        /* stream generic header */

        strh = start_tag(pb, "strh");

        switch(stream->codec_type) {

        case CODEC_TYPE_VIDEO: put_tag(pb, "vids"); break;

        case CODEC_TYPE_AUDIO: put_tag(pb, "auds"); break;

//        case CODEC_TYPE_TEXT : put_tag(pb, "txts"); break;

        case CODEC_TYPE_DATA : put_tag(pb, "dats"); break;

        }

        if(stream->codec_type == CODEC_TYPE_VIDEO)

            put_le32(pb, stream->codec_tag);

        else

            put_le32(pb, 1);

        put_le32(pb, 0); /* flags */

        put_le16(pb, 0); /* priority */

        put_le16(pb, 0); /* language */

        put_le32(pb, 0); /* initial frame */

        ff_parse_specific_params(stream, &au_byterate, &au_ssize, &au_scale);

        put_le32(pb, au_scale); /* scale */

        put_le32(pb, au_byterate); /* rate */

        av_set_pts_info(s->streams[i], 64, au_scale, au_byterate);

        put_le32(pb, 0); /* start */

        avi->frames_hdr_strm[i] = url_ftell(pb); /* remember this offset to fill later */

        if (url_is_streamed(pb))

            put_le32(pb, AVI_MAX_RIFF_SIZE); /* FIXME: this may be broken, but who cares */

        else

            put_le32(pb, 0); /* length, XXX: filled later */

        /* suggested buffer size */ //FIXME set at the end to largest chunk

        if(stream->codec_type == CODEC_TYPE_VIDEO)

            put_le32(pb, 1024 * 1024);

        else if(stream->codec_type == CODEC_TYPE_AUDIO)

            put_le32(pb, 12 * 1024);

        else

            put_le32(pb, 0);

        put_le32(pb, -1); /* quality */

        put_le32(pb, au_ssize); /* sample size */

        put_le32(pb, 0);

        put_le16(pb, stream->width);

        put_le16(pb, stream->height);

        end_tag(pb, strh);

      if(stream->codec_type != CODEC_TYPE_DATA){

        strf = start_tag(pb, "strf");

        switch(stream->codec_type) {

        case CODEC_TYPE_VIDEO:

            put_bmp_header(pb, stream, codec_bmp_tags, 0);

            break;

        case CODEC_TYPE_AUDIO:

            if (put_wav_header(pb, stream) < 0) {

                av_free(avi);

                return -1;

            }

            break;

        default:

            return -1;

        }

        end_tag(pb, strf);

      }

        if (!url_is_streamed(pb)) {

            unsigned char tag[5];

            int j;

            /* Starting to lay out AVI OpenDML master index.

             * We want to make it JUNK entry for now, since we'd

             * like to get away without making AVI an OpenDML one

             * for compatibility reasons.

             */

            avi->indexes[i].entry = avi->indexes[i].ents_allocated = 0;

            avi->indexes[i].indx_start = start_tag(pb, "JUNK");

            put_le16(pb, 4);        /* wLongsPerEntry */

            put_byte(pb, 0);        /* bIndexSubType (0 == frame index) */

            put_byte(pb, 0);        /* bIndexType (0 == AVI_INDEX_OF_INDEXES) */

            put_le32(pb, 0);        /* nEntriesInUse (will fill out later on) */

            put_tag(pb, avi_stream2fourcc(&tag[0], i, stream->codec_type));

                                    /* dwChunkId */

            put_le64(pb, 0);        /* dwReserved[3]

            put_le32(pb, 0);           Must be 0.    */

            for (j=0; j < AVI_MASTER_INDEX_SIZE * 2; j++)

                 put_le64(pb, 0);

            end_tag(pb, avi->indexes[i].indx_start);

        }

        end_tag(pb, list2);

    }

    if (!url_is_streamed(pb)) {

        /* AVI could become an OpenDML one, if it grows beyond 2Gb range */

        avi->odml_list = start_tag(pb, "JUNK");

        put_tag(pb, "odml");

        put_tag(pb, "dmlh");

        put_le32(pb, 248);

        for (i = 0; i < 248; i+= 4)

             put_le32(pb, 0);

        end_tag(pb, avi->odml_list);

    }

    end_tag(pb, list1);

    avi->movi_list = start_tag(pb, "LIST");

    put_tag(pb, "movi");

    put_flush_packet(pb);

    return 0;

}

static int avi_write_ix(AVFormatContext *s)

{

    ByteIOContext *pb = &s->pb;

    AVIContext *avi = s->priv_data;

    unsigned char tag[5];

    unsigned char ix_tag[] = "ix00";

    int i, j;

    assert(!url_is_streamed(pb));

    if (avi->riff_id > AVI_MASTER_INDEX_SIZE)

        return -1;

    for (i=0;i<s->nb_streams;i++) {

         offset_t ix, pos;

         avi_stream2fourcc(&tag[0], i, s->streams[i]->codec->codec_type);

         ix_tag[3] = '0' + i;

         /* Writing AVI OpenDML leaf index chunk */

         ix = url_ftell(pb);

         put_tag(pb, &ix_tag[0]);     /* ix?? */

         put_le32(pb, avi->indexes[i].entry * 8 + 24);

                                      /* chunk size */

         put_le16(pb, 2);             /* wLongsPerEntry */

         put_byte(pb, 0);             /* bIndexSubType (0 == frame index) */

         put_byte(pb, 1);             /* bIndexType (1 == AVI_INDEX_OF_CHUNKS) */

         put_le32(pb, avi->indexes[i].entry);

                                      /* nEntriesInUse */

         put_tag(pb, &tag[0]);        /* dwChunkId */

         put_le64(pb, avi->movi_list);/* qwBaseOffset */

         put_le32(pb, 0);             /* dwReserved_3 (must be 0) */

         for (j=0; j<avi->indexes[i].entry; j++) {

             AVIIentry* ie = avi_get_ientry(&avi->indexes[i], j);

             put_le32(pb, ie->pos + 8);

             put_le32(pb, ((uint32_t)ie->len & ~0x80000000) |

                          (ie->flags & 0x10 ? 0 : 0x80000000));

         }

         put_flush_packet(pb);

         pos = url_ftell(pb);

         /* Updating one entry in the AVI OpenDML master index */

         url_fseek(pb, avi->indexes[i].indx_start - 8, SEEK_SET);

         put_tag(pb, "indx");                 /* enabling this entry */

         url_fskip(pb, 8);

         put_le32(pb, avi->riff_id);          /* nEntriesInUse */

         url_fskip(pb, 16*avi->riff_id);

         put_le64(pb, ix);                    /* qwOffset */

         put_le32(pb, pos - ix);              /* dwSize */

         put_le32(pb, avi->indexes[i].entry); /* dwDuration */

         url_fseek(pb, pos, SEEK_SET);

    }

    return 0;

}

static int avi_write_idx1(AVFormatContext *s)

{

    ByteIOContext *pb = &s->pb;

    AVIContext *avi = s->priv_data;

    offset_t file_size, idx_chunk;

    int i, n, nb_frames, au_byterate, au_ssize, au_scale;

    AVCodecContext *stream;

    unsigned char tag[5];

    if (!url_is_streamed(pb)) {

        AVIIentry* ie = 0, *tie;

        int entry[MAX_STREAMS];

        int empty, stream_id = -1;

        idx_chunk = start_tag(pb, "idx1");

        memset(&entry[0], 0, sizeof(entry));

        do {

            empty = 1;

            for (i=0; i<s->nb_streams; i++) {

                 if (avi->indexes[i].entry <= entry[i])

                     continue;

                 tie = avi_get_ientry(&avi->indexes[i], entry[i]);

                 if (empty || tie->pos < ie->pos) {

                     ie = tie;

                     stream_id = i;

                 }

                 empty = 0;

            }

            if (!empty) {

                avi_stream2fourcc(&tag[0], stream_id,

                                  s->streams[stream_id]->codec->codec_type);

                put_tag(pb, &tag[0]);

                put_le32(pb, ie->flags);

                put_le32(pb, ie->pos);

                put_le32(pb, ie->len);

                entry[stream_id]++;

            }

        } while (!empty);

        end_tag(pb, idx_chunk);

        /* Fill in frame/sample counters */

        file_size = url_ftell(pb);

        nb_frames = 0;

        for(n=0;n<s->nb_streams;n++) {

            assert(avi->frames_hdr_strm[n]);

                stream = s->streams[n]->codec;

                url_fseek(pb, avi->frames_hdr_strm[n], SEEK_SET);

                ff_parse_specific_params(stream, &au_byterate, &au_ssize, &au_scale);

                if (au_ssize == 0) {

                    put_le32(pb, avi->packet_count[n]);

                } else {

                    put_le32(pb, avi->audio_strm_length[n] / au_ssize);

                }

            if(stream->codec_type == CODEC_TYPE_VIDEO)

                nb_frames = FFMAX(nb_frames, avi->packet_count[n]);

       }

        assert(avi->frames_hdr_all);

        url_fseek(pb, avi->frames_hdr_all, SEEK_SET);

        put_le32(pb, nb_frames);

       url_fseek(pb, file_size, SEEK_SET);

    }

    return 0;

}

static int avi_write_packet(AVFormatContext *s, AVPacket *pkt)

{

    AVIContext *avi = s->priv_data;

    ByteIOContext *pb = &s->pb;

    unsigned char tag[5];

    unsigned int flags=0;

    const int stream_index= pkt->stream_index;

    AVCodecContext *enc= s->streams[stream_index]->codec;

    int size= pkt->size;

//    av_log(s, AV_LOG_DEBUG, "%lld %d %d\n", pkt->dts, avi->packet_count[stream_index], stream_index);

    while(enc->block_align==0 && pkt->dts != AV_NOPTS_VALUE && pkt->dts > avi->packet_count[stream_index]){

        AVPacket empty_packet;

        av_init_packet(&empty_packet);

        empty_packet.size= 0;

        empty_packet.data= NULL;

        empty_packet.stream_index= stream_index;

        avi_write_packet(s, &empty_packet);

//        av_log(s, AV_LOG_DEBUG, "dup %lld %d\n", pkt->dts, avi->packet_count[stream_index]);

    }

    avi->packet_count[stream_index]++;

    // Make sure to put an OpenDML chunk when the file size exceeds the limits

    if (!url_is_streamed(pb) &&

        (url_ftell(pb) - avi->riff_start > AVI_MAX_RIFF_SIZE)) {

        avi_write_ix(s);

        end_tag(pb, avi->movi_list);

        if (avi->riff_id == 1)

            avi_write_idx1(s);

        end_tag(pb, avi->riff_start);

        avi->movi_list = avi_start_new_riff(avi, pb, "AVIX", "movi");

    }

    avi_stream2fourcc(&tag[0], stream_index, enc->codec_type);

    if(pkt->flags&PKT_FLAG_KEY)

        flags = 0x10;

    if (enc->codec_type == CODEC_TYPE_AUDIO) {

       avi->audio_strm_length[stream_index] += size;

    }

    if (!url_is_streamed(&s->pb)) {

        AVIIndex* idx = &avi->indexes[stream_index];

        int cl = idx->entry / AVI_INDEX_CLUSTER_SIZE;

        int id = idx->entry % AVI_INDEX_CLUSTER_SIZE;

        if (idx->ents_allocated <= idx->entry) {

            idx->cluster = av_realloc(idx->cluster, (cl+1)*sizeof(void*));

            if (!idx->cluster)

                return -1;

            idx->cluster[cl] = av_malloc(AVI_INDEX_CLUSTER_SIZE*sizeof(AVIIentry));

            if (!idx->cluster[cl])

                return -1;

            idx->ents_allocated += AVI_INDEX_CLUSTER_SIZE;

        }

        idx->cluster[cl][id].flags = flags;

        idx->cluster[cl][id].pos = url_ftell(pb) - avi->movi_list;

        idx->cluster[cl][id].len = size;

        idx->entry++;

    }

    put_buffer(pb, tag, 4);

    put_le32(pb, size);

    put_buffer(pb, pkt->data, size);

    if (size & 1)

        put_byte(pb, 0);

    put_flush_packet(pb);

    return 0;

}

static int avi_write_trailer(AVFormatContext *s)

{

    AVIContext *avi = s->priv_data;

    ByteIOContext *pb = &s->pb;

    int res = 0;

    int i, j, n, nb_frames;

    offset_t file_size;

    if (!url_is_streamed(pb))

    {

    if (avi->riff_id == 1) {

        end_tag(pb, avi->movi_list);

        res = avi_write_idx1(s);

        end_tag(pb, avi->riff_start);

    } else {

        avi_write_ix(s);

        end_tag(pb, avi->movi_list);

        end_tag(pb, avi->riff_start);

        file_size = url_ftell(pb);

        url_fseek(pb, avi->odml_list - 8, SEEK_SET);

        put_tag(pb, "LIST"); /* Making this AVI OpenDML one */

        url_fskip(pb, 16);

        for (n=nb_frames=0;n<s->nb_streams;n++) {

             AVCodecContext *stream = s->streams[n]->codec;

             if (stream->codec_type == CODEC_TYPE_VIDEO) {

                 if (nb_frames < avi->packet_count[n])

                     nb_frames = avi->packet_count[n];

             } else {

                 if (stream->codec_id == CODEC_ID_MP2 || stream->codec_id == CODEC_ID_MP3) {

                     nb_frames += avi->packet_count[n];

                }

            }

        }

        put_le32(pb, nb_frames);

        url_fseek(pb, file_size, SEEK_SET);

    }

    }

    put_flush_packet(pb);

    for (i=0; i<MAX_STREAMS; i++) {

         for (j=0; j<avi->indexes[i].ents_allocated/AVI_INDEX_CLUSTER_SIZE; j++)

              av_free(avi->indexes[i].cluster[j]);

         av_free(avi->indexes[i].cluster);

         avi->indexes[i].cluster = NULL;

         avi->indexes[i].ents_allocated = avi->indexes[i].entry = 0;

    }

    return res;

}

static AVOutputFormat avi_oformat = {

    "avi",

    "avi format",

    "video/x-msvideo",

    "avi",

    sizeof(AVIContext),

    CODEC_ID_MP2,

    CODEC_ID_MPEG4,

    avi_write_header,

    avi_write_packet,

    avi_write_trailer,

};

int avienc_init(void)

{

    av_register_output_format(&avi_oformat);

    return 0;

}

#endif //CONFIG_MUXERS