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BOOL PVideoDevice::SetFrameSize ( unsigned  width,
unsigned  height 
) [virtual, inherited]

Set the frame size to be used.

Note that devices may not be able to produce the requested size, and this function will fail. See SetFrameSizeConverter().

Default behaviour sets the frameWidth and frameHeight variables and returns TRUE.

widthNew width of frame
heightNew height of frame

Reimplemented in PVideoInputDevice_BeOSVideo, PVideoOutputDeviceRGB, PVideoInput1394DcDevice, PVideoInputDevice_1394AVC, PVideoInputDevice_BSDCAPTURE, PVideoInputDevice_1394DC, PVideoInputDevice_V4L, PVideoInputDevice_V4L2, PVideoInputDevice_FakeVideo, PVideoInputDevice_VideoForWindows, and PVideoOutputDevice_Window.

Definition at line 808 of file videoio.cxx.

Referenced by PVideoInputDevice_BeOSVideo::SetFrameSize(), PVideoInputDevice_VideoForWindows::SetFrameSize(), PVideoOutputDeviceRGB::SetFrameSize(), PVideoInputDevice_FakeVideo::SetFrameSize(), PVideoInputDevice_V4L2::SetFrameSize(), PVideoInputDevice_V4L::SetFrameSize(), PVideoInputDevice_BSDCAPTURE::SetFrameSize(), PVideoChannel::SetGrabberFrameSize(), and PVideoChannel::SetRenderFrameSize().

  unsigned oldWidth = frameWidth;
  unsigned oldHeight = frameHeight;

  unsigned minWidth, minHeight, maxWidth, maxHeight;
  GetFrameSizeLimits(minWidth, minHeight, maxWidth, maxHeight);

  if (width < minWidth)
    frameWidth = minWidth;
  else if (width > maxWidth)
    frameWidth = maxWidth;
    frameWidth = width;

  if (height < minHeight)
    frameHeight = minHeight;
  else if (height > maxHeight)
    frameHeight = maxHeight;
    frameHeight = height;

  if (converter != NULL) {
    if (!converter->SetSrcFrameSize(width, height) ||
        !converter->SetDstFrameSize(width, height, FALSE)) {
      PTRACE(1, "PVidDev\tSetFrameSize with converter failed with " << width << 'x' << height);
      return FALSE;

  PTRACE_IF(2, oldWidth != frameWidth || oldHeight != frameHeight,
            "PVidDev\tSetFrameSize to " << frameWidth << 'x' << frameHeight);
  return TRUE;

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