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Add a workaround for the Nexus 9 dropping frames with the new renderer

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This commit is contained in:
Cameron Gutman 2015-03-16 21:26:02 -04:00
parent 42c65f4f16
commit 7ce29e3a09
2 changed files with 34 additions and 5 deletions
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14
app/src/main/java/com/limelight/binding/video/MediaCodecDecoderRenderer.java
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@ -27,10 +27,11 @@ public class MediaCodecDecoderRenderer extends EnhancedDecoderRenderer {
private ByteBuffer[] videoDecoderInputBuffers;
private MediaCodec videoDecoder;
private Thread rendererThread;
private boolean needsSpsBitstreamFixup, isExynos4;
private final boolean needsSpsBitstreamFixup, isExynos4;
private VideoDepacketizer depacketizer;
private boolean adaptivePlayback;
private final boolean adaptivePlayback;
private int initialWidth, initialHeight;
private final int dequeueOutputBufferTimeout;
private boolean needsBaselineSpsHack;
private SeqParameterSet savedSps;
@ -55,12 +56,17 @@ public class MediaCodecDecoderRenderer extends EnhancedDecoderRenderer {
}
if (decoder == null) {
// This case is handled later in setup()
needsSpsBitstreamFixup = false;
isExynos4 = false;
adaptivePlayback = false;
dequeueOutputBufferTimeout = 0;
return;
}
decoderName = decoder.getName();
// Set decoder-specific attributes
dequeueOutputBufferTimeout = MediaCodecHelper.getOptimalOutputBufferDequeueTimeout(decoderName, decoder);
adaptivePlayback = MediaCodecHelper.decoderSupportsAdaptivePlayback(decoderName, decoder);
needsSpsBitstreamFixup = MediaCodecHelper.decoderNeedsSpsBitstreamRestrictions(decoderName, decoder);
needsBaselineSpsHack = MediaCodecHelper.decoderNeedsBaselineSpsHack(decoderName, decoder);
@ -145,7 +151,7 @@ public class MediaCodecDecoderRenderer extends EnhancedDecoderRenderer {
while (!isInterrupted()) {
try {
// Try to output a frame
int outIndex = videoDecoder.dequeueOutputBuffer(info, 50000);
int outIndex = videoDecoder.dequeueOutputBuffer(info, dequeueOutputBufferTimeout);
if (outIndex >= 0) {
long presentationTimeUs = info.presentationTimeUs;
int lastIndex = outIndex;
@ -189,7 +195,7 @@ public class MediaCodecDecoderRenderer extends EnhancedDecoderRenderer {
}
};
rendererThread.setName("Video - Renderer (MediaCodec)");
rendererThread.setPriority(Thread.MAX_PRIORITY);
rendererThread.setPriority(Thread.NORM_PRIORITY + 2);
rendererThread.start();
}

25
app/src/main/java/com/limelight/binding/video/MediaCodecHelper.java
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@ -26,7 +26,16 @@ public class MediaCodecHelper {
private static final List<String> spsFixupBitstreamFixupDecoderPrefixes;
private static final List<String> whitelistedAdaptiveResolutionPrefixes;
private static final List<String> baselineProfileHackPrefixes;
private static final List<String> fastOutputPollPrefixes;
private static final int FAST_OUTPUT_POLL_US = 3; // 3 us
private static final int NORMAL_OUTPUT_POLL_US = 50000; // 50 ms
static {
fastOutputPollPrefixes = new LinkedList<String>();
fastOutputPollPrefixes.add("omx.nvidia");
}
static {
preferredDecoders = new LinkedList<String>();
}
@ -97,6 +106,20 @@ public class MediaCodecHelper {
return false;
}
public static int getOptimalOutputBufferDequeueTimeout(String decoderName, MediaCodecInfo decoderInfo) {
// This concept of "fast output polling" is a workaround for certain devices that are powerful enough
// that the governor overzealously reduces the clockspeed of the CPU enough that it causes frames to be
// lost. This (at least) affects the Denver Tegra K1 running Android 5.0. To simplify things, I've simply
// set all Tegra devices to use fast polling.
if (isDecoderInList(fastOutputPollPrefixes, decoderName)) {
LimeLog.info("Decoder "+decoderName+" requires fast output polling");
return FAST_OUTPUT_POLL_US;
}
else {
return NORMAL_OUTPUT_POLL_US;
}
}
public static boolean decoderNeedsSpsBitstreamRestrictions(String decoderName, MediaCodecInfo decoderInfo) {
return isDecoderInList(spsFixupBitstreamFixupDecoderPrefixes, decoderName);