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Improve performance of the CPU decoder and add some details about changing decoders

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This commit is contained in:
Cameron Gutman 2014-11-16 11:52:08 -08:00
parent a17af070c5
commit 4ae29b0075
3 changed files with 38 additions and 17 deletions
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53
app/src/main/java/com/limelight/binding/video/AndroidCpuDecoderRenderer.java
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@ -21,14 +21,14 @@ import com.limelight.nvstream.av.video.cpu.AvcDecoder;
@SuppressWarnings("EmptyCatchBlock")
public class AndroidCpuDecoderRenderer implements VideoDecoderRenderer {
private Thread rendererThread;
private Thread rendererThread, decoderThread;
private int targetFps;
private static final int DECODER_BUFFER_SIZE = 92*1024;
private ByteBuffer decoderBuffer;
// Only sleep if the difference is above this value
private static final int WAIT_CEILING_MS = 8;
private static final int WAIT_CEILING_MS = 5;
private static final int LOW_PERF = 1;
private static final int MED_PERF = 2;
@ -108,9 +108,7 @@ public class AndroidCpuDecoderRenderer implements VideoDecoderRenderer {
case LOW_PERF:
// Disable the loop filter for performance reasons
avcFlags = AvcDecoder.DISABLE_LOOP_FILTER |
AvcDecoder.FAST_BILINEAR_FILTERING |
AvcDecoder.FAST_DECODE;
avcFlags = AvcDecoder.FAST_BILINEAR_FILTERING;
// Use plenty of threads to try to utilize the CPU as best we can
threadCount = cpuCount - 1;
@ -118,8 +116,7 @@ public class AndroidCpuDecoderRenderer implements VideoDecoderRenderer {
default:
case MED_PERF:
avcFlags = AvcDecoder.BILINEAR_FILTERING |
AvcDecoder.FAST_DECODE;
avcFlags = AvcDecoder.BILINEAR_FILTERING;
// Only use 2 threads to minimize frame processing latency
threadCount = 2;
@ -156,6 +153,26 @@ public class AndroidCpuDecoderRenderer implements VideoDecoderRenderer {
@Override
public boolean start(final VideoDepacketizer depacketizer) {
decoderThread = new Thread() {
@Override
public void run() {
DecodeUnit du;
while (!isInterrupted()) {
try {
du = depacketizer.takeNextDecodeUnit();
} catch (InterruptedException e) {
break;
}
submitDecodeUnit(du);
depacketizer.freeDecodeUnit(du);
}
}
};
decoderThread.setName("Video - Decoder (CPU)");
decoderThread.setPriority(Thread.MAX_PRIORITY - 1);
decoderThread.start();
rendererThread = new Thread() {
@Override
public void run() {
@ -163,17 +180,15 @@ public class AndroidCpuDecoderRenderer implements VideoDecoderRenderer {
DecodeUnit du;
while (!isInterrupted())
{
du = depacketizer.pollNextDecodeUnit();
if (du != null) {
submitDecodeUnit(du);
depacketizer.freeDecodeUnit(du);
}
long diff = nextFrameTime - System.currentTimeMillis();
if (diff > WAIT_CEILING_MS) {
LockSupport.parkNanos(1);
continue;
try {
Thread.sleep(diff - WAIT_CEILING_MS);
} catch (InterruptedException e) {
return;
}
continue;
}
nextFrameTime = computePresentationTimeMs(targetFps);
@ -194,10 +209,14 @@ public class AndroidCpuDecoderRenderer implements VideoDecoderRenderer {
@Override
public void stop() {
rendererThread.interrupt();
decoderThread.interrupt();
try {
rendererThread.join();
} catch (InterruptedException e) { }
rendererThread.join();
} catch (InterruptedException e) { }
try {
decoderThread.join();
} catch (InterruptedException e) { }
}
@Override

1
app/src/main/res/values/strings.xml
View File

@ -106,4 +106,5 @@
<string name="category_advanced_settings">Advanced Settings</string>
<string name="title_decoder_list">Change decoder</string>
<string name="summary_decoder_list">Software decoding may improve video latency at lower streaming settings</string>
</resources>

1
app/src/main/res/xml/preferences.xml
View File

@ -52,6 +52,7 @@
android:title="@string/title_decoder_list"
android:entries="@array/decoder_names"
android:entryValues="@array/decoder_values"
android:summary="@string/summary_decoder_list"
android:defaultValue="auto" />
</PreferenceCategory>