Add encoded SHM passthrough support

include/cvmmap_streamer/config/runtime_config.hpp

@@ -40,6 +40,12 @@ enum class EncoderDeviceType {
 	Software,
 };
 
+enum class InputVideoSource {
+	Auto,
+	Raw,
+	Encoded,
+};
+
 enum class McapCompression {
 	None,
 	Lz4,
@@ -49,6 +55,7 @@ enum class McapCompression {
 struct InputConfig {
 	std::string uri{"cvmmap://default"};
 	std::string nats_url{"nats://localhost:4222"};
+	InputVideoSource video_source{InputVideoSource::Auto};
 };
 
 struct EncoderConfig {
@@ -125,6 +132,7 @@ std::string_view to_string(RtmpMode mode);
 std::string_view to_string(RtmpTransportType transport);
 std::string_view to_string(EncoderBackendType backend);
 std::string_view to_string(EncoderDeviceType device);
+std::string_view to_string(InputVideoSource source);
 std::string_view to_string(McapCompression compression);
 std::expected<McapCompression, std::string> parse_mcap_compression(std::string_view raw);