getDefaultFormats method

@override Future<ScreenFormatDefaults> getDefaultFormats(String displayId)

Get default formats for display and loopback devices.

Implementation

@override
Future<ScreenFormatDefaults> getDefaultFormats(String displayId) async {
  final displayIdPtr = displayId.toNativeUtf8();
  final videoFormatOutPtr = calloc<bindings.MiniAVVideoInfo>();
  final audioFormatOutPtr = calloc<bindings.MiniAVAudioInfo>();

  try {
    final result = bindings.MiniAV_Screen_GetDefaultFormats(
      displayIdPtr.cast<ffi.Char>(),
      videoFormatOutPtr,
      audioFormatOutPtr,
    );

    if (result != bindings.MiniAVResultCode.MINIAV_SUCCESS) {
      throw Exception(
        'Failed to get default formats for display $displayId: ${result.name}',
      );
    }

    final videoFormat = VideoFormatInfoFFIToPlatform.fromNative(
      videoFormatOutPtr.ref,
    ).toPlatformType();
    // Audio might not be supported or returned, check for zeroed struct or specific values if needed
    final audioFormat = AudioInfoFFIToPlatform.fromNative(
      audioFormatOutPtr.ref,
    ).toPlatformType();

    // Determine if audioFormat is valid (e.g. sampleRate > 0 or format != UNKNOWN)
    // For simplicity, we'll assume if C API returns success, audioFormat might be valid or zeroed.
    // A more robust check would be to see if audioFormat.sampleRate > 0 or similar.
    final bool isAudioFormatValid =
        audioFormat.sampleRate > 0 && audioFormat.channels > 0;

    return (videoFormat, isAudioFormatValid ? audioFormat : null);
  } finally {
    calloc.free(displayIdPtr);
    calloc.free(videoFormatOutPtr);
    calloc.free(audioFormatOutPtr);
  }
}