This summary provides an overview of key information from the document in 3 sentences: The document discusses a media player application that uses augmented reality tracking to detect when a target is moving or stopped. It describes Java and JNI code for controlling audio playback based on the target's movement status. The media player uses OpenGL for 3D rendering and includes functions for starting, stopping, and seeking playback as well as detecting movement with a highpass filter.

1. ojagNaha #7
Shusaku FUKUMINE
@shusaku17

3. AR User Interface
media player
start stop seekTo(backward, forward)

4. Qualcomm SDK 1.0.0
sample ImageTargets
GLSurfaceView extends
Media Player
android

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7. -Media Player-
Start stop
forwardseek
backwardseek

8. OpenGL
3D(OpenGL ) => 2D( )
(0, 0, 0)
(0,0,0) (10, 0, 0)

9. - -
(x1, y1, z1) (x2, y2, z2)

10. highpass filter

11. java
// media player
private Audio[] mAudio = new Audio[MAXNUM];
public void audioController(int id)
{
if (mAudio[id] != null) {
mAudio[id].controller();// pause start start pause
}
}

12. JNI
//
Target *thisTarget = target[id]; //
if (thisTarget->isMoveStatusChange(point)) {
// java audioController
env->CallVoidMethod(obj, audioControlMethodId, id);
}
// env :java
// obj :java
//audioMethodId : id

13. java
//
bool
isMoveStatusChange(QCAR::Vec2F vec1, QCAR::Vec2F vec2)
{
float ret = hpf(vec1, vec2);
if (status == STOPED) {
if (ret >= 5.0f) {
status = MOVING;
return true;
}
} else {
if (ret <= 5.0f) {
status = STOPED;
return true;
}
}
return false;
}

14. Media Player

15. CPU