/*

 *      GPAC - Multimedia Framework C SDK

 *

 *      Authors: Jean Le Feuvre

 *      Copyright (c) Telecom ParisTech 2000-2023

 *          All rights reserved

 *

 *  This file is part of GPAC / ISO Media File Format sub-project

 *

 *  GPAC 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, or (at your option)

 *  any later version.

 *

 *  GPAC 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; see the file COPYING.  If not, write to

 *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.

 *

 */

#include <gpac/internal/isomedia_dev.h>

#include <gpac/constants.h>

#ifndef GPAC_DISABLE_ISOM

//the only static var. Used to store any error happening while opening a movie

static GF_Err MP4_API_IO_Err;

void gf_isom_set_last_error(GF_ISOFile *movie, GF_Err error)

{

  if (!movie) {

    MP4_API_IO_Err = error;

  } else {

    movie->LastError = error;

  }

}

GF_EXPORT

GF_Err gf_isom_last_error(GF_ISOFile *the_file)

{

  if (!the_file) return MP4_API_IO_Err;

  return the_file->LastError;

}

GF_EXPORT

u8 gf_isom_get_mode(GF_ISOFile *the_file)

{

  if (!the_file) return 0;

  return the_file->openMode;

}

#if 0 //unused

/*! gets file size of an ISO file

\param isom_file the target ISO file

\return the file size in bytes

*/

u64 gf_isom_get_file_size(GF_ISOFile *the_file)

{

  if (!the_file) return 0;

  if (the_file->movieFileMap) return gf_bs_get_size(the_file->movieFileMap->bs);

#ifndef GPAC_DISABLE_ISOM_WRITE

  if (the_file->editFileMap) return gf_bs_get_size(the_file->editFileMap->bs);

#endif

  return 0;

}

#endif

GF_EXPORT

GF_Err gf_isom_freeze_order(GF_ISOFile *file)

{

  u32 i=0;

  GF_Box *box;

  if (!file) return GF_BAD_PARAM;

  while ((box=gf_list_enum(file->TopBoxes, &i))) {

    gf_isom_box_freeze_order(box);

  }

  return GF_OK;

}

GF_EXPORT

GF_Err gf_isom_set_inplace_padding(GF_ISOFile *file, u32 padding)

{

  if (!file) return GF_BAD_PARAM;

  file->padding = padding;

  return GF_OK;

}

/**************************************************************

          Sample Manip

**************************************************************/

//creates a new empty sample

GF_EXPORT

GF_ISOSample *gf_isom_sample_new()

{

  GF_ISOSample *tmp;

  GF_SAFEALLOC(tmp, GF_ISOSample);

  return tmp;

}

//delete a sample

GF_EXPORT

void gf_isom_sample_del(GF_ISOSample **samp)

{

  if (!samp || ! *samp) return;

  if ((*samp)->data && (*samp)->dataLength) gf_free((*samp)->data);

  gf_free(*samp);

  *samp = NULL;

}

static u32 gf_isom_probe_type(u32 type)

{

  switch (type) {

  case GF_ISOM_BOX_TYPE_FTYP:

  case GF_ISOM_BOX_TYPE_MOOV:

    return 2;

#ifndef GPAC_DISABLE_ISOM_FRAGMENTS

  case GF_ISOM_BOX_TYPE_MOOF:

  case GF_ISOM_BOX_TYPE_STYP:

  case GF_ISOM_BOX_TYPE_SIDX:

  case GF_ISOM_BOX_TYPE_EMSG:

  case GF_ISOM_BOX_TYPE_PRFT:

    //we map free as segment when it is first in the file - a regular file shall start with ftyp or a file sig, not free

    //since our route stack may patch boxes to free for incomplete segments, we must map this to free

    case GF_ISOM_BOX_TYPE_FREE:

    return 3;

#ifndef GPAC_DISABLE_ISOM_ADOBE

  /*Adobe specific*/

  case GF_ISOM_BOX_TYPE_AFRA:

  case GF_ISOM_BOX_TYPE_ABST:

#endif

#endif

  case GF_ISOM_BOX_TYPE_MDAT:

  case GF_ISOM_BOX_TYPE_SKIP:

  case GF_ISOM_BOX_TYPE_UDTA:

  case GF_ISOM_BOX_TYPE_META:

  case GF_ISOM_BOX_TYPE_VOID:

  case GF_ISOM_BOX_TYPE_JP:

  case GF_QT_BOX_TYPE_WIDE:

    return 1;

  default:

    return 0;

  }

}

GF_EXPORT

u32 gf_isom_probe_file_range(const char *fileName, u64 start_range, u64 end_range)

{

  u32 type = 0;

  if (!strncmp(fileName, "gmem://", 7)) {

    u32 size;

    u8 *mem_address;

    if (gf_blob_get(fileName, &mem_address, &size, NULL) != GF_OK) {

      return 0;

    }

        if (size && (size > start_range + 8)) {

      type = GF_4CC(mem_address[start_range + 4], mem_address[start_range + 5], mem_address[start_range + 6], mem_address[start_range + 7]);

        }

        gf_blob_release(fileName);

  } else if (!strncmp(fileName, "isobmff://", 10)) {

    return 2;

  } else {

    u32 nb_read;

    unsigned char data[4];

    FILE *f = gf_fopen(fileName, "rb");

    if (!f) return 0;

    if (start_range) gf_fseek(f, start_range, SEEK_SET);

    type = 0;

    nb_read = (u32) gf_fread(data, 4, f);

    if (nb_read == 4) {

      if (gf_fread(data, 4, f) == 4) {

        type = GF_4CC(data[0], data[1], data[2], data[3]);

      }

    }

    gf_fclose(f);

    if (!nb_read) return 0;

  }

  return gf_isom_probe_type(type);

}

GF_EXPORT

u32 gf_isom_probe_file(const char *fileName)

{

  return gf_isom_probe_file_range(fileName, 0, 0);

}

GF_EXPORT

u32 gf_isom_probe_data(const u8*inBuf, u32 inSize)

{

  u32 type;

  if (inSize < 8) return 0;

  type = GF_4CC(inBuf[4], inBuf[5], inBuf[6], inBuf[7]);

  return gf_isom_probe_type(type);

}

#ifndef GPAC_DISABLE_AV_PARSERS

#include <gpac/internal/media_dev.h>

#endif

#ifndef GPAC_DISABLE_ISOM_FRAGMENTS

static GF_Err isom_create_init_from_mem(const char *fileName, GF_ISOFile *file)

{

  u32 sample_rate=0;

  u32 nb_channels=0;

  u32 bps=0;

  //u32 atag=0;

  u32 nal_len=4;

  u32 width = 0;

  u32 height = 0;

  u32 timescale = 10000000;

  u64 tfdt = 0;

  char sz4cc[5];

  char CodecParams[2048];

  u32 CodecParamLen=0;

  char *sep, *val;

  GF_TrackBox *trak;

  GF_TrackExtendsBox *trex;

  GF_SampleTableBox *stbl;

  sz4cc[0] = 0;

  val = (char*) ( fileName + strlen("isobmff://") );

  while (1)  {

    sep = strchr(val, ' ');

    if (sep) sep[0] = 0;

    if (!strncmp(val, "4cc=", 4)) strcpy(sz4cc, val+4);

    else if (!strncmp(val, "init=", 5)) {

      char szH[3], *data = val+5;

      u32 i, len = (u32) strlen(data);

      for (i=0; i<len; i+=2) {

        u32 v;

        //init is hex-encoded so 2 input bytes for one output char

        szH[0] = data[i];

        szH[1] = data[i+1];

        szH[2] = 0;

        sscanf(szH, "%X", &v);

        CodecParams[CodecParamLen] = (char) v;

        CodecParamLen++;

      }

    }

    else if (!strncmp(val, "nal=", 4)) nal_len = atoi(val+4);

    else if (!strncmp(val, "bps=", 4)) bps = atoi(val+4);

    //else if (!strncmp(val, "atag=", 5)) atag = atoi(val+5);

    else if (!strncmp(val, "ch=", 3)) nb_channels = atoi(val+3);

    else if (!strncmp(val, "srate=", 6)) sample_rate = atoi(val+6);

    else if (!strncmp(val, "w=", 2)) width = atoi(val+2);

    else if (!strncmp(val, "h=", 2)) height = atoi(val+2);

    else if (!strncmp(val, "scale=", 6)) timescale = atoi(val+6);

    else if (!strncmp(val, "tfdt=", 5)) {

      sscanf(val+5, LLX, &tfdt);

    }

    if (!sep) break;

    sep[0] = ' ';

    val = sep+1;

  }

  if (!stricmp(sz4cc, "H264") || !stricmp(sz4cc, "AVC1")) {

  }

  else if (!stricmp(sz4cc, "AACL")) {

  }

  else {

    GF_LOG(GF_LOG_WARNING, GF_LOG_CONTAINER, ("[iso file] Cannot convert smooth media type %s to ISO init segment\n", sz4cc));

    return GF_NOT_SUPPORTED;

  }

  file->moov = (GF_MovieBox *) gf_isom_box_new(GF_ISOM_BOX_TYPE_MOOV);

  if (!file->moov) return GF_OUT_OF_MEM;

  gf_list_add(file->TopBoxes, file->moov);

  file->moov->mov = file;

  file->is_smooth = GF_TRUE;

  file->moov->mvhd = (GF_MovieHeaderBox *) gf_isom_box_new_parent(&file->moov->child_boxes, GF_ISOM_BOX_TYPE_MVHD);

  if (!file->moov->mvhd) return GF_OUT_OF_MEM;

  file->moov->mvhd->timeScale = timescale;

  file->moov->mvex = (GF_MovieExtendsBox *) gf_isom_box_new_parent(&file->moov->child_boxes, GF_ISOM_BOX_TYPE_MVEX);

  if (!file->moov->mvex) return GF_OUT_OF_MEM;

  trex = (GF_TrackExtendsBox *) gf_isom_box_new_parent(&file->moov->mvex->child_boxes, GF_ISOM_BOX_TYPE_TREX);

  if (!trex) return GF_OUT_OF_MEM;

  trex->def_sample_desc_index = 1;

  trex->trackID = 1;

  gf_list_add(file->moov->mvex->TrackExList, trex);

  trak = (GF_TrackBox *) gf_isom_box_new_parent(&file->moov->child_boxes, GF_ISOM_BOX_TYPE_TRAK);

  if (!trak) return GF_OUT_OF_MEM;

  trak->moov = file->moov;

  gf_list_add(file->moov->trackList, trak);

  trak->Header = (GF_TrackHeaderBox *) gf_isom_box_new_parent(&trak->child_boxes, GF_ISOM_BOX_TYPE_TKHD);

  if (!trak->Header) return GF_OUT_OF_MEM;

  trak->Header->trackID = 1;

  trak->Header->flags |= 1;

  trak->Header->width = width;

  trak->Header->height = height;

  trak->Media = (GF_MediaBox *) gf_isom_box_new_parent(&trak->child_boxes, GF_ISOM_BOX_TYPE_MDIA);

  if (!trak->Media) return GF_OUT_OF_MEM;

  trak->Media->mediaTrack = trak;

  trak->Media->mediaHeader = (GF_MediaHeaderBox *) gf_isom_box_new_parent(&trak->Media->child_boxes, GF_ISOM_BOX_TYPE_MDHD);

  if (!trak->Media->mediaHeader) return GF_OUT_OF_MEM;

  trak->Media->mediaHeader->timeScale = timescale;

  trak->Media->handler = (GF_HandlerBox *) gf_isom_box_new_parent(&trak->Media->child_boxes,GF_ISOM_BOX_TYPE_HDLR);

  if (!trak->Media->handler) return GF_OUT_OF_MEM;

    //we assume by default vide for handler type (only used for smooth streaming)

  trak->Media->handler->handlerType = width ? GF_ISOM_MEDIA_VISUAL : GF_ISOM_MEDIA_AUDIO;

  trak->Media->information = (GF_MediaInformationBox *) gf_isom_box_new_parent(&trak->Media->child_boxes, GF_ISOM_BOX_TYPE_MINF);

  if (!trak->Media->information) return GF_OUT_OF_MEM;

  trak->Media->information->sampleTable = (GF_SampleTableBox *) gf_isom_box_new_parent(&trak->Media->information->child_boxes, GF_ISOM_BOX_TYPE_STBL);

  if (!trak->Media->information->sampleTable) return GF_OUT_OF_MEM;

  stbl = trak->Media->information->sampleTable;

  stbl->SampleSize = (GF_SampleSizeBox *) gf_isom_box_new_parent(&stbl->child_boxes, GF_ISOM_BOX_TYPE_STSZ);

  if (!stbl->SampleSize) return GF_OUT_OF_MEM;

  stbl->TimeToSample = (GF_TimeToSampleBox *) gf_isom_box_new_parent(&stbl->child_boxes, GF_ISOM_BOX_TYPE_STTS);

  if (!stbl->TimeToSample) return GF_OUT_OF_MEM;

  stbl->ChunkOffset = gf_isom_box_new_parent(&stbl->child_boxes, GF_ISOM_BOX_TYPE_STCO);

  if (!stbl->ChunkOffset) return GF_OUT_OF_MEM;

  stbl->SampleToChunk = (GF_SampleToChunkBox *) gf_isom_box_new_parent(&stbl->child_boxes, GF_ISOM_BOX_TYPE_STSC);

  if (!stbl->SampleToChunk) return GF_OUT_OF_MEM;

  stbl->SyncSample = (GF_SyncSampleBox *) gf_isom_box_new_parent(&stbl->child_boxes, GF_ISOM_BOX_TYPE_STSS);

  if (!stbl->SyncSample) return GF_OUT_OF_MEM;

  stbl->SampleDescription = (GF_SampleDescriptionBox *) gf_isom_box_new_parent(&stbl->child_boxes, GF_ISOM_BOX_TYPE_STSD);

  if (!stbl->SampleDescription) return GF_OUT_OF_MEM;

  trak->dts_at_seg_start = tfdt;

  trak->dts_at_next_frag_start = tfdt;

  if (!stricmp(sz4cc, "H264") || !stricmp(sz4cc, "AVC1")) {

#ifndef GPAC_DISABLE_AV_PARSERS

    u32 pos = 0;

    u32 end, sc_size=0;

#endif

    GF_MPEGVisualSampleEntryBox *avc =  (GF_MPEGVisualSampleEntryBox *) gf_isom_box_new_parent(&stbl->SampleDescription->child_boxes, GF_ISOM_BOX_TYPE_AVC1);

    if (!avc) return GF_OUT_OF_MEM;

    avc->avc_config =  (GF_AVCConfigurationBox *) gf_isom_box_new_parent(&avc->child_boxes, GF_ISOM_BOX_TYPE_AVCC);

    if (!avc->avc_config) return GF_OUT_OF_MEM;

    avc->Width = width;

    avc->Height = height;

    avc->avc_config->config = gf_odf_avc_cfg_new();

    avc->avc_config->config->nal_unit_size = nal_len;

    avc->avc_config->config->configurationVersion = 1;

#ifndef GPAC_DISABLE_AV_PARSERS

    //locate pps and sps

    gf_media_nalu_next_start_code((u8 *) CodecParams, CodecParamLen, &sc_size);

    pos += sc_size;

    while (pos<CodecParamLen) {

      GF_NALUFFParam *slc;

      u8 nal_type;

      char *nal = &CodecParams[pos];

      end = gf_media_nalu_next_start_code(nal, CodecParamLen-pos, &sc_size);

      if (!end) end = CodecParamLen;

      GF_SAFEALLOC(slc, GF_NALUFFParam);

      if (!slc) break;

      slc->size = end;

      slc->data = gf_malloc(sizeof(char)*slc->size);

      if (!slc->data) return GF_OUT_OF_MEM;

      memcpy(slc->data, nal, sizeof(char)*slc->size);

      nal_type = nal[0] & 0x1F;

      if (nal_type == GF_AVC_NALU_SEQ_PARAM) {

/*        AVCState avcc;

        u32 idx = gf_avc_read_sps(slc->data, slc->size, &avcc, 0, NULL);

        avc->avc_config->config->profile_compatibility = avcc.sps[idx].prof_compat;

        avc->avc_config->config->AVCProfileIndication = avcc.sps[idx].profile_idc;

        avc->avc_config->config->AVCLevelIndication = avcc.sps[idx].level_idc;

        avc->avc_config->config->chroma_format = avcc.sps[idx].chroma_format;

        avc->avc_config->config->luma_bit_depth = 8 + avcc.sps[idx].luma_bit_depth_m8;

        avc->avc_config->config->chroma_bit_depth = 8 + avcc.sps[idx].chroma_bit_depth_m8;

*/

        gf_list_add(avc->avc_config->config->sequenceParameterSets, slc);

      } else {

        gf_list_add(avc->avc_config->config->pictureParameterSets, slc);

      }

      pos += slc->size + sc_size;

    }

#endif

    AVC_RewriteESDescriptor(avc);

  }

  else if (!stricmp(sz4cc, "AACL")) {

#ifndef GPAC_DISABLE_AV_PARSERS

    GF_M4ADecSpecInfo aacinfo;

#endif

    GF_MPEGAudioSampleEntryBox *aac =  (GF_MPEGAudioSampleEntryBox *) gf_isom_box_new_parent(&stbl->SampleDescription->child_boxes, GF_ISOM_BOX_TYPE_MP4A);

    if (!aac) return GF_OUT_OF_MEM;

    aac->esd = (GF_ESDBox *) gf_isom_box_new_parent(&aac->child_boxes, GF_ISOM_BOX_TYPE_ESDS);

    if (!aac->esd) return GF_OUT_OF_MEM;

    aac->esd->desc = gf_odf_desc_esd_new(2);

    if (!aac->esd->desc) return GF_OUT_OF_MEM;

#ifndef GPAC_DISABLE_AV_PARSERS

    memset(&aacinfo, 0, sizeof(GF_M4ADecSpecInfo));

    aacinfo.nb_chan = nb_channels;

    aacinfo.base_object_type = GF_M4A_AAC_LC;

    aacinfo.base_sr = sample_rate;

    gf_m4a_write_config(&aacinfo, &aac->esd->desc->decoderConfig->decoderSpecificInfo->data, &aac->esd->desc->decoderConfig->decoderSpecificInfo->dataLength);

#endif

    aac->esd->desc->decoderConfig->streamType = GF_STREAM_AUDIO;

    aac->esd->desc->decoderConfig->objectTypeIndication = GF_CODECID_AAC_MPEG4;

    aac->bitspersample = bps;

    aac->samplerate_hi = sample_rate;

    aac->channel_count = nb_channels;

  }

  return GF_OK;

}

#endif

/**************************************************************

          File Opening in streaming mode

      the file map is regular (through FILE handles)

**************************************************************/

GF_EXPORT

GF_Err gf_isom_open_progressive_ex(const char *fileName, u64 start_range, u64 end_range, Bool enable_frag_bounds, GF_ISOFile **the_file, u64 *BytesMissing, u32 *outBoxType)

{

  GF_Err e;

  GF_ISOFile *movie;

  if (!BytesMissing || !the_file)

    return GF_BAD_PARAM;

  *BytesMissing = 0;

  *the_file = NULL;

  movie = gf_isom_new_movie();

  if (!movie) return GF_OUT_OF_MEM;

  movie->fileName = gf_strdup(fileName);

  movie->openMode = GF_ISOM_OPEN_READ;

  movie->signal_frag_bounds = enable_frag_bounds;

#ifndef GPAC_DISABLE_ISOM_WRITE

  movie->editFileMap = NULL;

  movie->finalName = NULL;

#endif /*GPAC_DISABLE_ISOM_WRITE*/

  if (!strncmp(fileName, "isobmff://", 10)) {

    movie->movieFileMap = NULL;

#ifndef GPAC_DISABLE_ISOM_FRAGMENTS

    e = isom_create_init_from_mem(fileName, movie);

#else

      e = GF_NOT_SUPPORTED;

#endif

  } else {

    //do NOT use FileMapping on incomplete files

    e = gf_isom_datamap_new(fileName, NULL, GF_ISOM_DATA_MAP_READ, &movie->movieFileMap);

    if (e) {

      gf_isom_delete_movie(movie);

      return e;

    }

    if (start_range || end_range) {

      if (end_range>start_range) {

        gf_bs_seek(movie->movieFileMap->bs, end_range+1);

        gf_bs_truncate(movie->movieFileMap->bs);

      }

      gf_bs_seek(movie->movieFileMap->bs, start_range);

    }

    e = gf_isom_parse_movie_boxes(movie, outBoxType, BytesMissing, GF_TRUE);

  }

  if (e == GF_ISOM_INCOMPLETE_FILE) {

    //if we have a moov, we're fine

    if (movie->moov) {

      *the_file = (GF_ISOFile *)movie;

      return GF_OK;

    }

    //if not, delete the movie

    gf_isom_delete_movie(movie);

    return e;

  } else if (e) {

    //if not, delete the movie

    gf_isom_delete_movie(movie);

    return e;

  }

  //OK, let's return

  *the_file = (GF_ISOFile *)movie;

  return GF_OK;

}

GF_EXPORT

GF_Err gf_isom_open_progressive(const char *fileName, u64 start_range, u64 end_range, Bool enable_frag_bounds, GF_ISOFile **the_file, u64 *BytesMissing)

{

  return gf_isom_open_progressive_ex(fileName, start_range, end_range, enable_frag_bounds, the_file, BytesMissing, NULL);

}

void gf_bs_untruncate(GF_BitStream *bs);

GF_Err gf_isom_load_fragments(GF_ISOFile *movie, u64 start_range, u64 end_range, u64 *BytesMissing)

{

  gf_bs_untruncate(movie->movieFileMap->bs);

  if (end_range>start_range) {

    gf_bs_seek(movie->movieFileMap->bs, end_range+1);

    gf_bs_truncate(movie->movieFileMap->bs);

  }

  movie->current_top_box_start = start_range;

  gf_bs_seek(movie->movieFileMap->bs, start_range);

  return gf_isom_parse_movie_boxes(movie, NULL, BytesMissing, GF_TRUE);

}

/**************************************************************

          File Reading

**************************************************************/

GF_EXPORT

GF_ISOFile *gf_isom_open(const char *fileName, GF_ISOOpenMode OpenMode, const char *tmp_dir)

{

  GF_ISOFile *movie;

  MP4_API_IO_Err = GF_OK;

  switch (OpenMode & 0xFF) {

  case GF_ISOM_OPEN_READ_DUMP:

  case GF_ISOM_OPEN_READ:

    movie = gf_isom_open_file(fileName, OpenMode, NULL);

    break;

#ifndef GPAC_DISABLE_ISOM_WRITE

  case GF_ISOM_OPEN_WRITE:

    movie = gf_isom_create_movie(fileName, OpenMode, tmp_dir);

    break;

  case GF_ISOM_OPEN_EDIT:

  case GF_ISOM_OPEN_READ_EDIT:

  case GF_ISOM_OPEN_KEEP_FRAGMENTS:

    movie = gf_isom_open_file(fileName, OpenMode, tmp_dir);

    break;

  case GF_ISOM_WRITE_EDIT:

    movie = gf_isom_create_movie(fileName, OpenMode, tmp_dir);

    break;

#endif /*GPAC_DISABLE_ISOM_WRITE*/

  default:

    return NULL;

  }

  return (GF_ISOFile *) movie;

}

#if 0

/*! gets access to the data bitstream  - see \ref gf_isom_open

\param isom_file the target ISO file

\param out_bs set to the file input bitstream - do NOT destroy

\return error if any

*/

GF_Err gf_isom_get_bs(GF_ISOFile *movie, GF_BitStream **out_bs)

{

#ifndef GPAC_DISABLE_ISOM_WRITE

  if (!movie || movie->openMode != GF_ISOM_OPEN_WRITE || !movie->editFileMap) //memory mode

    return GF_NOT_SUPPORTED;

  if (movie->segment_bs)

    *out_bs = movie->segment_bs;

  else

    *out_bs = movie->editFileMap->bs;

  if (movie->moof)

    movie->moof->fragment_offset = 0;

  return GF_OK;

#else

  return GF_NOT_SUPPORTED;

#endif

}

#endif

GF_EXPORT

GF_Err gf_isom_write(GF_ISOFile *movie)

{

  GF_Err e;

  if (movie == NULL) return GF_ISOM_INVALID_FILE;

  e = GF_OK;

  //update duration of each track

  if (movie->moov) {

    u32 i, count = gf_list_count(movie->moov->trackList);

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

      GF_TrackBox *trak = gf_list_get(movie->moov->trackList, i);

      e = SetTrackDuration(trak);

      if (e) return e;

    }

  }

#ifndef GPAC_DISABLE_ISOM_WRITE

  //write our movie to the file

  if ((movie->openMode != GF_ISOM_OPEN_READ) && (movie->openMode != GF_ISOM_OPEN_READ_EDIT)) {

    gf_isom_get_duration(movie);

#ifndef GPAC_DISABLE_ISOM_FRAGMENTS

    //movie fragment mode, just store the fragment

    if ( (movie->openMode == GF_ISOM_OPEN_WRITE) && (movie->FragmentsFlags & GF_ISOM_FRAG_WRITE_READY) ) {

      e = gf_isom_close_fragments(movie);

      if (e) return e;

      //in case of mfra box usage -> create mfro, calculate box sizes and write it out

      if (movie->mfra) {

        if (!movie->mfra->mfro) {

          movie->mfra->mfro = (GF_MovieFragmentRandomAccessOffsetBox *)gf_isom_box_new_parent(&movie->mfra->child_boxes, GF_ISOM_BOX_TYPE_MFRO);

          if (!movie->mfra->mfro) return GF_OUT_OF_MEM;

        }

        e = gf_isom_box_size((GF_Box *)movie->mfra);

        if (e) return e;

        movie->mfra->mfro->container_size = (u32) movie->mfra->size;

        //write mfra

        if (!strcmp(movie->fileName, "_gpac_isobmff_redirect") && movie->on_block_out) {

          GF_BitStream *bs = gf_bs_new_cbk(isom_on_block_out, movie, movie->on_block_out_block_size);

          e = gf_isom_box_write((GF_Box *)movie->mfra, bs);

          gf_bs_del(bs);

        } else {

          e = gf_isom_box_write((GF_Box *)movie->mfra, movie->editFileMap->bs);

        }

      }

    } else

#endif

      e = WriteToFile(movie, GF_FALSE);

  }

#endif /*GPAC_DISABLE_ISOM_WRITE*/

#ifndef GPAC_DISABLE_ISOM_FRAGMENTS

  if (movie->moov) {

    u32 i;

    for (i=0; i<gf_list_count(movie->moov->trackList); i++) {

      GF_TrackBox *trak = (GF_TrackBox*)gf_list_get(movie->moov->trackList, i);

      /*delete any pending dataHandler of scalable enhancements*/

      if (trak->Media && trak->Media->information && trak->Media->information->scalableDataHandler && (trak->Media->information->scalableDataHandler != movie->movieFileMap))

        gf_isom_datamap_del(trak->Media->information->scalableDataHandler);

    }

  }

#endif

  return e;

}

GF_EXPORT

GF_Err gf_isom_close(GF_ISOFile *movie)

{

  GF_Err e=GF_OK;

  if (movie == NULL) return GF_ISOM_INVALID_FILE;

  e = gf_isom_write(movie);

  //free and return;

  gf_isom_delete_movie(movie);

  return e;

}

#if 0 //unused

/*! checks if files has root OD/IOD or not

\param isom_file the target ISO file

\return GF_TRUE if the file has a root OD or IOD */

Bool gf_isom_has_root_od(GF_ISOFile *movie)

{

  if (!movie || !movie->moov || !movie->moov->iods || !movie->moov->iods->descriptor) return GF_FALSE;

  return GF_TRUE;

}

#endif

GF_EXPORT

void gf_isom_disable_odf_conversion(GF_ISOFile *movie, Bool disable)

{

  if (movie) movie->disable_odf_translate = disable ? 1 : 0;

}

//this funct is used for exchange files, where the iods contains an OD

GF_EXPORT

GF_Descriptor *gf_isom_get_root_od(GF_ISOFile *movie)

{

  GF_Descriptor *desc;

  GF_ObjectDescriptor *od;

  GF_InitialObjectDescriptor *iod;

  GF_IsomObjectDescriptor *isom_od;

  GF_IsomInitialObjectDescriptor *isom_iod;

  GF_ESD *esd;

  GF_ES_ID_Inc *inc;

  u32 i;

  u8 useIOD;

  if (!movie || !movie->moov) return NULL;

  if (!movie->moov->iods) return NULL;

  if (movie->disable_odf_translate) {

    //duplicate our descriptor

    movie->LastError = gf_odf_desc_copy((GF_Descriptor *) movie->moov->iods->descriptor, &desc);

    if (movie->LastError) return NULL;

    return desc;

  }

  od = NULL;

  iod = NULL;

  switch (movie->moov->iods->descriptor->tag) {

  case GF_ODF_ISOM_OD_TAG:

    od = (GF_ObjectDescriptor*)gf_malloc(sizeof(GF_ObjectDescriptor));

    if (!od) return NULL;

    memset(od, 0, sizeof(GF_ObjectDescriptor));

    od->ESDescriptors = gf_list_new();

    useIOD = 0;

    break;

  case GF_ODF_ISOM_IOD_TAG:

    iod = (GF_InitialObjectDescriptor*)gf_malloc(sizeof(GF_InitialObjectDescriptor));

    if (!iod) return NULL;

    memset(iod, 0, sizeof(GF_InitialObjectDescriptor));

    iod->ESDescriptors = gf_list_new();

    useIOD = 1;

    break;

  default:

    return NULL;

  }

  //duplicate our descriptor

  movie->LastError = gf_odf_desc_copy((GF_Descriptor *) movie->moov->iods->descriptor, &desc);

  if (movie->LastError) {

    if (od) {

      gf_list_del(od->ESDescriptors);

      gf_free(od);

    }

    if (iod) {

      gf_list_del(iod->ESDescriptors);

      gf_free(iod);

    }

    return NULL;

  }

  if (!useIOD) {

    isom_od = (GF_IsomObjectDescriptor *)desc;

    od->objectDescriptorID = isom_od->objectDescriptorID;

    od->extensionDescriptors = isom_od->extensionDescriptors;

    isom_od->extensionDescriptors = NULL;

    od->IPMP_Descriptors = isom_od->IPMP_Descriptors;

    isom_od->IPMP_Descriptors = NULL;

    od->OCIDescriptors = isom_od->OCIDescriptors;

    isom_od->OCIDescriptors = NULL;

    od->URLString = isom_od->URLString;

    isom_od->URLString = NULL;

    od->tag = GF_ODF_OD_TAG;

    //then recreate the desc in Inc

    i=0;

    while ((inc = (GF_ES_ID_Inc*)gf_list_enum(isom_od->ES_ID_IncDescriptors, &i))) {

      movie->LastError = GetESDForTime(movie->moov, inc->trackID, 0, &esd);

      if (!movie->LastError) movie->LastError = gf_list_add(od->ESDescriptors, esd);

      if (movie->LastError) {

        gf_odf_desc_del(desc);

        gf_odf_desc_del((GF_Descriptor *) od);

        return NULL;

      }

    }

    gf_odf_desc_del(desc);

    return (GF_Descriptor *)od;

  } else {

    isom_iod = (GF_IsomInitialObjectDescriptor *)desc;

    iod->objectDescriptorID = isom_iod->objectDescriptorID;

    iod->extensionDescriptors = isom_iod->extensionDescriptors;

    isom_iod->extensionDescriptors = NULL;

    iod->IPMP_Descriptors = isom_iod->IPMP_Descriptors;

    isom_iod->IPMP_Descriptors = NULL;

    iod->OCIDescriptors = isom_iod->OCIDescriptors;

    isom_iod->OCIDescriptors = NULL;

    iod->URLString = isom_iod->URLString;

    isom_iod->URLString = NULL;

    iod->tag = GF_ODF_IOD_TAG;

    iod->audio_profileAndLevel = isom_iod->audio_profileAndLevel;

    iod->graphics_profileAndLevel = isom_iod->graphics_profileAndLevel;

    iod->inlineProfileFlag = isom_iod->inlineProfileFlag;

    iod->OD_profileAndLevel = isom_iod->OD_profileAndLevel;

    iod->scene_profileAndLevel = isom_iod->scene_profileAndLevel;

    iod->visual_profileAndLevel = isom_iod->visual_profileAndLevel;

    iod->IPMPToolList = isom_iod->IPMPToolList;

    isom_iod->IPMPToolList = NULL;

    //then recreate the desc in Inc

    i=0;

    while ((inc = (GF_ES_ID_Inc*)gf_list_enum(isom_iod->ES_ID_IncDescriptors, &i))) {

      movie->LastError = GetESDForTime(movie->moov, inc->trackID, 0, &esd);

      if (!movie->LastError) movie->LastError = gf_list_add(iod->ESDescriptors, esd);

      if (movie->LastError) {

        gf_odf_desc_del(desc);

        gf_odf_desc_del((GF_Descriptor *) iod);

        return NULL;

      }

    }

    gf_odf_desc_del(desc);

    return (GF_Descriptor *)iod;

  }

}

GF_EXPORT

u32 gf_isom_get_track_count(GF_ISOFile *movie)

{

  if (!movie || !movie->moov) return 0;

  if (!movie->moov->trackList) {

    movie->LastError = GF_ISOM_INVALID_FILE;

    return 0;

  }

  return gf_list_count(movie->moov->trackList);

}

GF_EXPORT

GF_ISOTrackID gf_isom_get_track_id(GF_ISOFile *movie, u32 trackNumber)

{

  GF_TrackBox *trak;

  if (!movie) return 0;

  trak = gf_isom_get_track_from_file(movie, trackNumber);

  if (!trak || !trak->Header) return 0;

  return trak->Header->trackID;

}

GF_EXPORT

u32 gf_isom_get_track_by_id(GF_ISOFile *the_file, GF_ISOTrackID trackID)

{

  u32 count;

  u32 i;

  if (the_file == NULL) return 0;

  count = gf_isom_get_track_count(the_file);

  if (!count) return 0;

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

    GF_TrackBox *trak = gf_isom_get_track_from_file(the_file, i+1);

    if (!trak || !trak->Header) return 0;

    if (trak->Header->trackID == trackID) return i+1;

  }

  return 0;

}

GF_EXPORT

GF_ISOTrackID gf_isom_get_track_original_id(GF_ISOFile *movie, u32 trackNumber)

{

  GF_TrackBox *trak;

  if (!movie) return 0;

  trak = gf_isom_get_track_from_file(movie, trackNumber);

  if (!trak) return 0;

  return trak->originalID;

}

//return the timescale of the movie, 0 if error

GF_EXPORT

Bool gf_isom_has_movie(GF_ISOFile *file)

{

  if (file && file->moov) return GF_TRUE;

  return GF_FALSE;

}

#ifndef GPAC_DISABLE_ISOM

GF_EXPORT

Bool gf_isom_has_segment(GF_ISOFile *file, u32 *brand, u32 *version)

{

#ifndef GPAC_DISABLE_ISOM_FRAGMENTS

  u32 i;

  GF_Box *a;

  i = 0;

  while (NULL != (a = (GF_Box*)gf_list_enum(file->TopBoxes, &i))) {

#ifndef GPAC_DISABLE_ISOM_FRAGMENTS

    if (a->type == GF_ISOM_BOX_TYPE_STYP) {

      GF_FileTypeBox *styp = (GF_FileTypeBox *)a;

      *brand = styp->majorBrand;

      *version = styp->minorVersion;

      return GF_TRUE;

    }

#endif

  }

#endif