kVTVideoDecoderSpecification_EnableHardwareAcceleratedVideoDecoder 40 libavcodec/videotoolbox.c #ifndef kVTVideoDecoderSpecification_EnableHardwareAcceleratedVideoDecoder kVTVideoDecoderSpecification_EnableHardwareAcceleratedVideoDecoder 727 libavcodec/videotoolbox.c kVTVideoDecoderSpecification_EnableHardwareAcceleratedVideoDecoder :