Method Resize

examples/VulkanBenchmark.cpp:708–749

	}

	ScopedFrame Resize(const AVFrame* input_frame, int width, int height) {
		if (!input_frame || input_frame->format != AV_PIX_FMT_RGBA)
			throw std::runtime_error("Resize expects an RGBA software frame");
		if (input_frame->width == width && input_frame->height == height) {
			ScopedFrame clone(av_frame_clone(input_frame));
			if (!clone)
				throw std::runtime_error("Unable to clone RGBA input frame");
			return clone;
		}

		sws_context_ = sws_getCachedContext(
			sws_context_,
			input_frame->width,
			input_frame->height,
			AV_PIX_FMT_RGBA,
			width,
			height,
			AV_PIX_FMT_RGBA,
			SWS_BILINEAR,
			nullptr,
			nullptr,
			nullptr);
		if (!sws_context_)
			throw std::runtime_error("sws_getCachedContext resize failed");

		ScopedFrame output_frame;
		output_frame.get()->format = AV_PIX_FMT_RGBA;
		output_frame.get()->width = width;
		output_frame.get()->height = height;
		CheckAv(av_frame_get_buffer(output_frame.get(), 32), "av_frame_get_buffer resize");
		CheckAv(av_frame_copy_props(output_frame.get(), input_frame), "av_frame_copy_props resize");
		CheckAv(av_frame_make_writable(output_frame.get()), "av_frame_make_writable resize");
		sws_scale(
			sws_context_,
			input_frame->data,
			input_frame->linesize,
			0,
			input_frame->height,
			output_frame.get()->data,
			output_frame.get()->linesize);
		return output_frame;
	}

private:
	SwsContext* sws_context_;