void print_input_modes (IDeckLink* deckLink)
{
IDeckLinkInput* deckLinkInput = NULL;
IDeckLinkDisplayModeIterator* displayModeIterator = NULL;
IDeckLinkDisplayMode* displayMode = NULL;
HRESULT result;
// Query the DeckLink for its configuration interface
result = deckLink->QueryInterface(IID_IDeckLinkInput, (void**)&deckLinkInput);
if (result != S_OK)
{
fprintf(stderr, "Could not obtain the IDeckLinkInput interface - result = %08x\n", result);
goto bail;
}
// Obtain an IDeckLinkDisplayModeIterator to enumerate the display modes supported on input
result = deckLinkInput->GetDisplayModeIterator(&displayModeIterator);
if (result != S_OK)
{
fprintf(stderr, "Could not obtain the video input display mode iterator - result = %08x\n", result);
goto bail;
}
// List all supported input display modes
printf("Supported video input display modes and pixel formats:\n");
while (displayModeIterator->Next(&displayMode) == S_OK)
{
char * displayModeString = NULL;
result = displayMode->GetName((const char **) &displayModeString);
if (result == S_OK)
{
char modeName[64];
int modeWidth;
int modeHeight;
BMDTimeValue frameRateDuration;
BMDTimeScale frameRateScale;
int pixelFormatIndex = 0; // index into the gKnownPixelFormats / gKnownFormatNames arrays
BMDDisplayModeSupport displayModeSupport;
// Obtain the display mode's properties
modeWidth = displayMode->GetWidth();
modeHeight = displayMode->GetHeight();
displayMode->GetFrameRate(&frameRateDuration, &frameRateScale);
printf(" %-20s \t %d x %d \t %7g FPS\t", displayModeString, modeWidth, modeHeight, (double)frameRateScale / (double)frameRateDuration);
// Print the supported pixel formats for this display mode
while ((gKnownPixelFormats[pixelFormatIndex] != 0) && (gKnownPixelFormatNames[pixelFormatIndex] != NULL))
{
if ((deckLinkInput->DoesSupportVideoMode(displayMode->GetDisplayMode(), gKnownPixelFormats[pixelFormatIndex], bmdVideoInputFlagDefault, &displayModeSupport, NULL) == S_OK)
&& (displayModeSupport != bmdDisplayModeNotSupported))
{
printf("%s\t", gKnownPixelFormatNames[pixelFormatIndex]);
}
pixelFormatIndex++;
}
printf("\n");
free(displayModeString);
}
// Release the IDeckLinkDisplayMode object to prevent a leak
displayMode->Release();
}
printf("\n");
bail:
// Ensure that the interfaces we obtained are released to prevent a memory leak
if (displayModeIterator != NULL)
displayModeIterator->Release();
if (deckLinkInput != NULL)
deckLinkInput->Release();
}
