Added Intra Refresh Support

src/Limelight.h

@@ -277,6 +277,10 @@ typedef struct _DECODE_UNIT {
 // number of slices per frame. This capability is only valid on video renderers.
 #define CAPABILITY_SLICES_PER_FRAME(x) (((unsigned char)(x)) << 24)
 
+// If set in the video renderer capabilities field, this flag specifies that the renderer
+// needs to opt-in to intra refresh, some clients (like the Xbox client with NVEnc) needs it
+#define CAPABILITY_INTRA_REFRESH 0x80
+
 // This callback is invoked to provide details about the video stream and allow configuration of the decoder.
 // Returns 0 on success, non-zero on failure.
 typedef int(*DecoderRendererSetup)(int videoFormat, int width, int height, int redrawRate, void* context, int drFlags);

src/SdpGenerator.c

@@ -309,6 +309,13 @@ static PSDP_OPTION getAttributesList(char*urlSafeAddr) {
         else {
             err |= addAttributeString(&optionHead, "x-ss-video[0].chromaSamplingType", "0");
         }
+
+        // Add intra-refresh if opted in
+        if (VideoCallbacks.capabilities & CAPABILITY_INTRA_REFRESH){
+            err |= addAttributeString(&optionHead, "x-ss-video[0].intraRefresh", "1");
+        } else {
+            err |= addAttributeString(&optionHead, "x-ss-video[0].intraRefresh", "0");
+        }
     }
 
     snprintf(payloadStr, sizeof(payloadStr), "%d", StreamConfig.width);