C++ (Cpp) jpeg_decoder_get_component_ptrの例

コード例 #1

ファイル: test.c プロジェクト: 10045125/xuggle-xuggler

int
main (int argc, char *argv[])
{
  unsigned char *data;
  int len;
  JpegDecoder *dec;
  char *fn = "biglebowski.jpg";
  unsigned char *ptr;
  int rowstride;
  int width;
  int height;

  dec = jpeg_decoder_new ();

  if (argc > 1)
    fn = argv[1];
  data = getfile (fn, &len);

  jpeg_decoder_addbits (dec, data, len);
  jpeg_decoder_decode (dec);

  jpeg_decoder_get_component_ptr (dec, 1, &ptr, &rowstride);
  jpeg_decoder_get_component_size (dec, 1, &width, &height);

  dump_pgm (ptr, rowstride, width, height);

  return 0;
}

コード例 #2

ファイル: jpeg_rgb_decoder.c プロジェクト: 10045125/xuggle-xuggler

int
jpeg_rgb_decoder_get_image (JpegRGBDecoder * rgbdec,
    unsigned char **image, int *rowstride, int *width, int *height)
{
  int i;

  jpeg_decoder_get_image_size (rgbdec->dec, &rgbdec->width, &rgbdec->height);
  for (i = 0; i < 3; i++) {
    jpeg_decoder_get_component_ptr (rgbdec->dec, i + 1,
        &rgbdec->component[i].image, &rgbdec->component[i].rowstride);
    jpeg_decoder_get_component_subsampling (rgbdec->dec, i + 1,
        &rgbdec->component[i].h_subsample, &rgbdec->component[i].v_subsample);
    rgbdec->component[i].alloc = 0;
    if (rgbdec->component[i].h_subsample > 1 ||
        rgbdec->component[i].v_subsample > 1) {
      unsigned char *dest;

      dest = malloc (rgbdec->width * rgbdec->height);
      if (rgbdec->component[i].v_subsample > 1) {
        if (rgbdec->component[i].h_subsample > 1) {
          imagescale2h2v_u8 (dest,
              rgbdec->width,
              rgbdec->component[i].image,
              rgbdec->component[i].rowstride, rgbdec->width, rgbdec->height);
        } else {
          imagescale2v_u8 (dest,
              rgbdec->width,
              rgbdec->component[i].image,
              rgbdec->component[i].rowstride, rgbdec->width, rgbdec->height);
        }
      } else {
        imagescale2h_u8 (dest,
            rgbdec->width,
            rgbdec->component[i].image,
            rgbdec->component[i].rowstride, rgbdec->width, rgbdec->height);
      }
      rgbdec->component[i].alloc = 1;
      rgbdec->component[i].image = dest;
      rgbdec->component[i].rowstride = rgbdec->width;
      rgbdec->component[i].h_subsample = 1;
      rgbdec->component[i].v_subsample = 1;
    }
  }

  rgbdec->image = malloc (rgbdec->width * rgbdec->height * 4);

  convert (rgbdec);

  if (image)
    *image = rgbdec->image;
  if (rowstride)
    *rowstride = rgbdec->width * 4;
  if (width)
    *width = rgbdec->width;
  if (height)
    *height = rgbdec->height;

  return 0;
}

コード例 #3

ファイル: test.c プロジェクト: cdaffara/symbiandump-os2

int
main (int argc, char *argv[])
{
  unsigned char *data;
  int len;
  JpegDecoder *dec;
  char *fn = "c:\\data\\liboil\\test.jpg";
  unsigned char *ptr;
  int rowstride;
  int width;
  int height;

  /*if (argc < 2) {
        printf("jpeg_test <file.jpg>\n");
        exit(1);
  }*/
  if (argc > 1)
        fn = argv[1];
  
  std_log(LOG_FILENAME_LINE, "Test Started examples_jpeg");
  dec = jpeg_decoder_new ();    //to create decoder instance
  
  data = getfile (fn, &len);

  jpeg_decoder_addbits (dec, data, len);
  jpeg_decoder_decode (dec);

  jpeg_decoder_get_component_ptr (dec, 1, &ptr, &rowstride);
  jpeg_decoder_get_component_size (dec, 1, &width, &height);

  dump_pgm (ptr, rowstride, width, height);
  
  std_log(LOG_FILENAME_LINE, "Test Successful");
  create_xml(0);
  return 0;
}