From 3236c0b93a135c2b18e8e4c3df210c6d2f7e5c24 Mon Sep 17 00:00:00 2001
From: Cameron Gutman <aicommander@gmail.com>
Date: Mon, 1 Dec 2014 22:58:52 -0800
Subject: [PATCH] Lower the level_idc of the SPS to the minimum required for
 streaming at a given resolution

---
 .../video/MediaCodecDecoderRenderer.java        | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/app/src/main/java/com/limelight/binding/video/MediaCodecDecoderRenderer.java b/app/src/main/java/com/limelight/binding/video/MediaCodecDecoderRenderer.java
index 5af027e0..178f8662 100644
--- a/app/src/main/java/com/limelight/binding/video/MediaCodecDecoderRenderer.java
+++ b/app/src/main/java/com/limelight/binding/video/MediaCodecDecoderRenderer.java
@@ -410,6 +410,23 @@ public class MediaCodecDecoderRenderer extends EnhancedDecoderRenderer {
 				spsBuf.position(header.offset+5);
 				
 				SeqParameterSet sps = SeqParameterSet.read(spsBuf);
+
+                // Some decoders rely on H264 level to decide how many buffers are needed
+                // Since we only need one frame buffered, we'll set the level as low as we can
+                // for known resolution combinations
+                if (initialWidth == 1280 && initialHeight == 720) {
+                    // Max 5 buffered frames at 1280x720x60
+                    LimeLog.info("Patching level_idc to 32");
+                    sps.level_idc = 32;
+                }
+                else if (initialWidth == 1920 && initialHeight == 1080) {
+                    // Max 4 buffered frames at 1920x1080x64
+                    LimeLog.info("Patching level_idc to 42");
+                    sps.level_idc = 42;
+                }
+                else {
+                    // Leave the profile alone (currently 5.0)
+                }
 				
 				// TI OMAP4 requires a reference frame count of 1 to decode successfully. Exynos 4
 				// also requires this fixup.