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Add option --max-fps

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Add an option to limit the capture frame rate. It only works for devices
with Android >= 10.

Fixes <https://github.com/Genymobile/scrcpy/issues/488>
This commit is contained in:
Romain Vimont
2019-11-17 22:07:19 +01:00
parent fb976816f9
commit 1d97d7213d
10 changed files with 87 additions and 12 deletions
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21
server/src/main/java/com/genymobile/scrcpy/ScreenEncoder.java
View File

@@ -6,6 +6,7 @@ import android.graphics.Rect;
import android.media.MediaCodec;
import android.media.MediaCodecInfo;
import android.media.MediaFormat;
import android.os.Build;
import android.os.IBinder;
import android.os.Looper;
import android.view.Surface;
@@ -26,18 +27,20 @@ public class ScreenEncoder implements Device.RotationListener {
private final ByteBuffer headerBuffer = ByteBuffer.allocate(12);
private int bitRate;
private int maxFps;
private int iFrameInterval;
private boolean sendFrameMeta;
private long ptsOrigin;
public ScreenEncoder(boolean sendFrameMeta, int bitRate, int iFrameInterval) {
public ScreenEncoder(boolean sendFrameMeta, int bitRate, int maxFps, int iFrameInterval) {
this.sendFrameMeta = sendFrameMeta;
this.bitRate = bitRate;
this.maxFps = maxFps;
this.iFrameInterval = iFrameInterval;
}
public ScreenEncoder(boolean sendFrameMeta, int bitRate) {
this(sendFrameMeta, bitRate, DEFAULT_I_FRAME_INTERVAL);
public ScreenEncoder(boolean sendFrameMeta, int bitRate, int maxFps) {
this(sendFrameMeta, bitRate, maxFps, DEFAULT_I_FRAME_INTERVAL);
}
@Override
@@ -60,7 +63,7 @@ public class ScreenEncoder implements Device.RotationListener {
// <https://github.com/Genymobile/scrcpy/issues/921>
Looper.prepareMainLooper();
MediaFormat format = createFormat(bitRate, iFrameInterval);
MediaFormat format = createFormat(bitRate, maxFps, iFrameInterval);
device.setRotationListener(this);
boolean alive;
try {
@@ -143,7 +146,8 @@ public class ScreenEncoder implements Device.RotationListener {
return MediaCodec.createEncoderByType("video/avc");
}
private static MediaFormat createFormat(int bitRate, int iFrameInterval) throws IOException {
@SuppressWarnings("checkstyle:MagicNumber")
private static MediaFormat createFormat(int bitRate, int maxFps, int iFrameInterval) {
MediaFormat format = new MediaFormat();
format.setString(MediaFormat.KEY_MIME, "video/avc");
format.setInteger(MediaFormat.KEY_BIT_RATE, bitRate);
@@ -153,6 +157,13 @@ public class ScreenEncoder implements Device.RotationListener {
format.setInteger(MediaFormat.KEY_I_FRAME_INTERVAL, iFrameInterval);
// display the very first frame, and recover from bad quality when no new frames
format.setLong(MediaFormat.KEY_REPEAT_PREVIOUS_FRAME_AFTER, REPEAT_FRAME_DELAY_US); // µs
if (maxFps > 0) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
format.setFloat(MediaFormat.KEY_MAX_FPS_TO_ENCODER, maxFps);
} else {
Ln.w("Max FPS is only supported since Android 10, the option has been ignored");
}
}
return format;
}