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Implement HAVE_LCD_ENABLE and lcd_update_rect(). When Rockbox runs in the background

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this greatly reduces CPU load. lcd_update_rect shoves a bit as well.

CPU usage with Rockbox in background is between 3% (with a 200kbps vbr mp3) and 12% (320kbps cbr mp3), so it's low but still dependent on codecs and even particular files.
Driving a WPS with peakmeter, e.g. the builtin one, adds about 30% cpu usage.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@27689 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Thomas Martitz 2010-08-04 01:03:25 +00:00
parent f66a233bdb
commit 594110e962
4 changed files with 98 additions and 24 deletions
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35
android/src/org/rockbox/RockboxFramebuffer.java
View file

@ -34,21 +34,11 @@ public class RockboxFramebuffer extends View
{
private Bitmap btm;
private ByteBuffer native_buf;
private Handler update_handler;
private Runnable cb;
public RockboxFramebuffer(Context c)
{
super(c);
update_handler = new Handler();
cb = new Runnable() {
public void run()
{
btm.copyPixelsFromBuffer(native_buf);
invalidate();
}
};
btm = null;
}
@ -66,12 +56,21 @@ public class RockboxFramebuffer extends View
public void java_lcd_update()
{
update_handler.post(cb);
btm.copyPixelsFromBuffer(native_buf);
postInvalidate();
}
public void java_lcd_update_rect(int x, int y, int w, int h)
{
/* can't copy a partial buffer */
btm.copyPixelsFromBuffer(native_buf);
postInvalidate(x, y, x+w, y+h);
}
private void LOG(CharSequence text)
{
Log.d("RockboxBootloader", (String) text);
Log.d("RockboxBootloader", (String) text);
}
public boolean onTouchEvent(MotionEvent me)
@ -93,6 +92,18 @@ public class RockboxFramebuffer extends View
return true;
}
/* the two below should only be called from the activity thread */
public void suspend()
{ /* suspend, Rockbox will not make any lcd updates */
set_lcd_active(0);
}
public void resume()
{ /* make updates again, the underlying function will
* send an event */
set_lcd_active(1);
}
public native void set_lcd_active(int active);
public native void pixelHandler(int x, int y);
public native void touchHandler(int down);
}