简单的jpeg转成avi的类

简单的jpeg转成avi的类(10) {
 for (int j = 0; j < 4; ++j) {
  fputc (i % 0x0100, file);
  i /= 0x100;
 }
}

int AviGenerator::initalize_header ()
{
 frames = this->jpeg_list.size ();
 if (frames <= 0)
  return -1;
 /* getting image, and hence, riff sizes */
 jpg_sz_64 = this->files_size ();
 if (-1 == jpg_sz_64) {
  cerr << "couldn't determine size of images" << endl;
  return -2;
 }
 riff_sz_64 = sizeof (struct AVI_list_hdrl) + 4 + 4 + jpg_sz_64 + 8 * frames + 8 + 8 + 16 * frames;

 if (riff_sz_64 >= MAX_RIFF_SZ) {
  cerr << "RIFF would exceed 2 Gb limit" << endl;
  return -3;
 }
 jpg_sz = (long) jpg_sz_64;
 riff_sz = (DWORD) riff_sz_64;

 //update the struct AVI_list_hdrl
 this->list_hdrl.avih.usec_per_frame = LILEND4(usec_per_frame);
 this->list_hdrl.avih.max_bytes_per_sec = LILEND4((int)1000000 * (jpg_sz / frames) / usec_per_frame);
 this->list_hdrl.avih.flags = LILEND4(AVIF_HASINDEX);
 this->list_hdrl.avih.tot_frames = LILEND4(frames);
 this->list_hdrl.avih.width = LILEND4(width);
 this->list_hdrl.avih.height = LILEND4(height);
 this->list_hdrl.strh.scale = LILEND4(usec_per_frame);
 this->list_hdrl.strh.rate = LILEND4(1000000);
 this->list_hdrl.strh.length = LILEND4(frames);
 this->list_hdrl.strf.width = LILEND4(width);
 this->list_hdrl.strf.height = LILEND4(height);
 this->list_hdrl.strf.image_sz = LILEND4(width * height * 3);
 this->list_hdrl.list_odml.frames = LILEND4(frames);

 return 0;
}

int AviGenerator::generate_avi ()
{
 if (this->initalize_header () != 0)
  return -1;

 //open the file
 FILE* fdest = fopen (this->avi_name_.c_str (), "wb");