static void _decompTest()

in tjunittest.c [475:559]
75 lines of code
21 McCabe index (conditional complexity)

static void _decompTest(tjhandle handle, unsigned char *jpegBuf,
                        size_t jpegSize, int w, int h, int pf, char *basename,
                        int subsamp, tjscalingfactor sf)
{
  void *dstBuf = NULL;
  unsigned char *yuvBuf = NULL;
  int _hdrw = 0, _hdrh = 0, _hdrsubsamp;
  int scaledWidth = TJSCALED(w, sf);
  int scaledHeight = TJSCALED(h, sf);
  size_t dstSize = 0;
  int bottomUp = tj3Get(handle, TJPARAM_BOTTOMUP);

  TRY_TJ(handle, tj3SetScalingFactor(handle, sf));

  TRY_TJ(handle, tj3DecompressHeader(handle, jpegBuf, jpegSize));
  _hdrw = tj3Get(handle, TJPARAM_JPEGWIDTH);
  _hdrh = tj3Get(handle, TJPARAM_JPEGHEIGHT);
  _hdrsubsamp = tj3Get(handle, TJPARAM_SUBSAMP);
  if (lossless && subsamp != TJSAMP_444 && subsamp != TJSAMP_GRAY)
    subsamp = TJSAMP_444;
  if (_hdrw != w || _hdrh != h || _hdrsubsamp != subsamp)
    THROW("Incorrect JPEG header");

  dstSize = scaledWidth * scaledHeight * tjPixelSize[pf];
  if ((dstBuf = malloc(dstSize * sampleSize)) == NULL)
    THROW("Memory allocation failure");
  memset(dstBuf, 0, dstSize * sampleSize);

  if (doYUV) {
    size_t yuvSize = tj3YUVBufSize(scaledWidth, yuvAlign, scaledHeight,
                                   subsamp);
    tjhandle handle2 = NULL;

    if ((handle2 = tj3Init(TJINIT_DECOMPRESS)) == NULL)
      THROW_TJ(NULL);
    TRY_TJ(handle2, tj3Set(handle2, TJPARAM_BOTTOMUP, bottomUp));
    TRY_TJ(handle2, tj3Set(handle2, TJPARAM_SUBSAMP, subsamp));

    if ((yuvBuf = (unsigned char *)malloc(yuvSize)) == NULL)
      THROW("Memory allocation failure");
    memset(yuvBuf, 0, yuvSize);

    printf("JPEG -> YUV %s ", subNameLong[subsamp]);
    if (sf.num != 1 || sf.denom != 1)
      printf("%d/%d ... ", sf.num, sf.denom);
    else printf("... ");
    TRY_TJ(handle, tj3DecompressToYUV8(handle, jpegBuf, jpegSize, yuvBuf,
                                       yuvAlign));
    if (checkBufYUV(yuvBuf, scaledWidth, scaledHeight, subsamp, sf))
      printf("Passed.\n");
    else printf("FAILED!\n");

    printf("YUV %s -> %s %s ... ", subNameLong[subsamp], pixFormatStr[pf],
           bottomUp ? "Bottom-Up" : "Top-Down ");
    TRY_TJ(handle2, tj3DecodeYUV8(handle2, yuvBuf, yuvAlign,
                                  (unsigned char *)dstBuf, scaledWidth, 0,
                                  scaledHeight, pf));
    tj3Destroy(handle2);
  } else {
    printf("JPEG -> %s %s ", pixFormatStr[pf],
           bottomUp ? "Bottom-Up" : "Top-Down ");
    if (sf.num != 1 || sf.denom != 1)
      printf("%d/%d ... ", sf.num, sf.denom);
    else printf("... ");
    if (precision == 8) {
      TRY_TJ(handle, tj3Decompress8(handle, jpegBuf, jpegSize,
                                    (unsigned char *)dstBuf, 0, pf));
    } else if (precision == 12) {
      TRY_TJ(handle, tj3Decompress12(handle, jpegBuf, jpegSize,
                                     (short *)dstBuf, 0, pf));
    } else {
      TRY_TJ(handle, tj3Decompress16(handle, jpegBuf, jpegSize,
                                     (unsigned short *)dstBuf, 0, pf));
    }
  }

  if (checkBuf(dstBuf, scaledWidth, scaledHeight, pf, subsamp, sf, bottomUp))
    printf("Passed.");
  else printf("FAILED!");
  printf("\n");

bailout:
  free(yuvBuf);
  free(dstBuf);
}