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cleanups for videoframereleasetimehelper

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This commit is contained in:
Drew Hill 2017-10-24 11:19:26 -04:00
parent 3830307cd3
commit 2081667591
1 changed files with 35 additions and 49 deletions
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84
library/core/src/main/java/com/google/android/exoplayer2/video/VideoFrameReleaseTimeHelper.java
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@ -24,6 +24,7 @@ import android.os.HandlerThread;
import android.os.Message;
import android.view.Choreographer;
import android.view.Choreographer.FrameCallback;
import android.view.Display;
import android.view.WindowManager;
import com.google.android.exoplayer2.C;
@ -33,7 +34,6 @@ import com.google.android.exoplayer2.C;
@TargetApi(16)
public final class VideoFrameReleaseTimeHelper {
private static final int DISPLAY_ID_UNKNOWN = -1;
private static final double DISPLAY_REFRESH_RATE_UNKNOWN = -1;
private static final long CHOREOGRAPHER_SAMPLE_DELAY_MILLIS = 500;
private static final long MAX_ALLOWED_DRIFT_NS = 20000000;
@ -41,10 +41,10 @@ public final class VideoFrameReleaseTimeHelper {
private static final long VSYNC_OFFSET_PERCENTAGE = 80;
private static final int MIN_FRAMES_FOR_ADJUSTMENT = 6;
private DisplayManager.DisplayListener displayListener = null;
private Context context = null;
private VSyncSampler vsyncSampler = null;
private final DefaultDisplayListener defaultDisplayListener;
private final VSyncSampler vsyncSampler;
private final boolean useDefaultDisplayVsync;
private long vsyncDurationNs = -1; // Value unused.
private long vsyncOffsetNs = -1; // Value unused.
@ -63,7 +63,10 @@ public final class VideoFrameReleaseTimeHelper {
* the default display's vsync signal.
*/
public VideoFrameReleaseTimeHelper() {
this(DISPLAY_REFRESH_RATE_UNKNOWN);
defaultDisplayListener = null;
useDefaultDisplayVsync = false;
vsyncSampler = null;
context = null;
}
/**
@ -73,16 +76,13 @@ public final class VideoFrameReleaseTimeHelper {
* @param context A context from which information about the default display can be retrieved.
*/
public VideoFrameReleaseTimeHelper(Context context) {
this(getDefaultDisplayRefreshRate(context));
this.context = context.getApplicationContext();
defaultDisplayListener = Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1 ?
new DefaultDisplayListener(context) : null;
useDefaultDisplayVsync = true;
vsyncSampler = VSyncSampler.getInstance();
}
private VideoFrameReleaseTimeHelper(double defaultDisplayRefreshRate) {
useDefaultDisplayVsync = defaultDisplayRefreshRate != DISPLAY_REFRESH_RATE_UNKNOWN;
if (useDefaultDisplayVsync) {
vsyncSampler = VSyncSampler.getInstance();
}
}
/**
* Enables the helper.
@ -92,7 +92,8 @@ public final class VideoFrameReleaseTimeHelper {
if (useDefaultDisplayVsync) {
vsyncSampler.addObserver();
setSync(getDefaultDisplayRefreshRate(context));
registerDisplayListener();
if (defaultDisplayListener != null)
defaultDisplayListener.register();
}
}
@ -102,38 +103,14 @@ public final class VideoFrameReleaseTimeHelper {
public void disable() {
if (useDefaultDisplayVsync) {
vsyncSampler.removeObserver();
unregisterDisplayListener();
}
}
private void registerDisplayListener() {
if (displayListener == null && context != null &&
Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
DisplayManager displayManager = context.getSystemService(DisplayManager.class);
if (displayManager != null) {
displayListener = new DefaultDisplayListener(context);
displayManager.registerDisplayListener(displayListener, null);
}
}
}
private void unregisterDisplayListener() {
if (context != null && displayListener != null &&
Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
DisplayManager displayManager = context.getSystemService(DisplayManager.class);
if (displayManager != null) {
displayManager.unregisterDisplayListener(displayListener);
displayListener = null;
}
if (defaultDisplayListener != null)
defaultDisplayListener.unregister();
}
}
private void setSync(double defaultDisplayRefreshRate) {
if (useDefaultDisplayVsync) {
vsyncDurationNs = (long) (C.NANOS_PER_SECOND / defaultDisplayRefreshRate);
vsyncOffsetNs = (vsyncDurationNs * VSYNC_OFFSET_PERCENTAGE) / 100;
}
vsyncDurationNs = (long) (C.NANOS_PER_SECOND / defaultDisplayRefreshRate);
vsyncOffsetNs = (vsyncDurationNs * VSYNC_OFFSET_PERCENTAGE) / 100;
}
/**
@ -234,12 +211,6 @@ public final class VideoFrameReleaseTimeHelper {
return snappedAfterDiff < snappedBeforeDiff ? snappedAfterNs : snappedBeforeNs;
}
private static int getDefaultDisplayId(Context context) {
WindowManager manager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
return manager != null && manager.getDefaultDisplay() != null ?
manager.getDefaultDisplay().getDisplayId() : DISPLAY_ID_UNKNOWN;
}
private static double getDefaultDisplayRefreshRate(Context context) {
WindowManager manager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
return manager != null && manager.getDefaultDisplay() != null ?
@ -341,12 +312,16 @@ public final class VideoFrameReleaseTimeHelper {
}
@TargetApi(17)
@TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
private class DefaultDisplayListener implements DisplayManager.DisplayListener {
private final Context context;
private final DisplayManager displayManager;
DefaultDisplayListener(Context context) {
this.context = context;
displayManager = context != null ?
(DisplayManager) context.getSystemService(Context.DISPLAY_SERVICE) : null;
}
@Override
@ -359,12 +334,23 @@ public final class VideoFrameReleaseTimeHelper {
@Override
public void onDisplayChanged(int displayId) {
final int defaultDisplayId = getDefaultDisplayId(context);
if (displayId == defaultDisplayId || defaultDisplayId == DISPLAY_ID_UNKNOWN) {
if (displayId == Display.DEFAULT_DISPLAY) {
setSync(getDefaultDisplayRefreshRate(context));
}
}
public void register() {
if (displayManager != null && context != null) { // context is used on callback
displayManager.registerDisplayListener(this, null);
}
}
public void unregister() {
if (displayManager != null) {
displayManager.unregisterDisplayListener(this);
}
}
}
}