Rework FFmpeg hardware support

internal/ffmpeg/hardware/hardware_windows.go

@@ -0,0 +1,61 @@
+package hardware
+
+import "github.com/AlexxIT/go2rtc/internal/api"
+
+const ProbeDXVA2H264 = "-init_hw_device dxva2 -f lavfi -i testsrc2 -t 1 -c h264_qsv -f null -"
+const ProbeDXVA2H265 = "-init_hw_device dxva2 -f lavfi -i testsrc2 -t 1 -c hevc_qsv -f null -"
+const ProbeDXVA2JPEG = "-init_hw_device dxva2 -f lavfi -i testsrc2 -t 1 -c mjpeg_qsv -f null -"
+const ProbeCUDAH264 = "-init_hw_device cuda -f lavfi -i testsrc2 -t 1 -c h264_nvenc -f null -"
+const ProbeCUDAH265 = "-init_hw_device cuda -f lavfi -i testsrc2 -t 1 -c hevc_nvenc -f null -"
+
+func ProbeAll(bin string) []api.Stream {
+	return []api.Stream{
+		{
+			Name: runToString(bin, ProbeDXVA2H264),
+			URL:  "ffmpeg:...#video=h264#hardware=" + EngineDXVA2,
+		},
+		{
+			Name: runToString(bin, ProbeDXVA2H265),
+			URL:  "ffmpeg:...#video=h265#hardware=" + EngineDXVA2,
+		},
+		{
+			Name: runToString(bin, ProbeDXVA2JPEG),
+			URL:  "ffmpeg:...#video=mjpeg#hardware=" + EngineDXVA2,
+		},
+		{
+			Name: runToString(bin, ProbeCUDAH264),
+			URL:  "ffmpeg:...#video=h264#hardware=" + EngineCUDA,
+		},
+		{
+			Name: runToString(bin, ProbeCUDAH265),
+			URL:  "ffmpeg:...#video=h265#hardware=" + EngineCUDA,
+		},
+	}
+}
+
+func ProbeHardware(bin, name string) string {
+	switch name {
+	case "h264":
+		if run(bin, ProbeCUDAH264) {
+			return EngineCUDA
+		}
+		if run(bin, ProbeDXVA2H264) {
+			return EngineDXVA2
+		}
+
+	case "h265":
+		if run(bin, ProbeCUDAH265) {
+			return EngineCUDA
+		}
+		if run(bin, ProbeDXVA2H265) {
+			return EngineDXVA2
+		}
+
+	case "mjpeg":
+		if run(bin, ProbeDXVA2JPEG) {
+			return EngineDXVA2
+		}
+	}
+
+	return EngineSoftware
+}