Add more AudioTrack APIs needed for exoplayer.

Also fix compiler warnings

src/api-impl-jni/audio/android_media_AudioTrack.c

@@ -42,8 +42,8 @@ JNIEXPORT void JNICALL Java_android_media_AudioTrack_native_1constructor(JNIEnv
 	snd_pcm_t *pcm_handle;
 	snd_pcm_hw_params_t *params;
 
-	jint channels_out;
+	unsigned int channels_out;
-	jint period_time;
+	unsigned int period_time;
 
 	int ret;
 
@@ -158,7 +158,7 @@ JNIEXPORT jint JNICALL Java_android_media_AudioTrack_getMinBufferSize(JNIEnv *en
 	if((*env)->ExceptionCheck(env))
 		(*env)->ExceptionDescribe(env);
 
-	printf("\n\nJava_android_media_AudioTrack_getMinBufferSize is returning: %d\n\n\n", frames * num_channels * 2);
+	printf("\n\nJava_android_media_AudioTrack_getMinBufferSize is returning: %ld\n\n\n", frames * num_channels * 2);
 	return frames * num_channels * 2; // FIXME: 2 bytes = 16 bits (s16)
 }
 
@@ -197,11 +197,8 @@ void periodic_update_callback(snd_async_handler_t *pcm_callback)
 //	return G_SOURCE_REMOVE;
 }
 
-JNIEXPORT void JNICALL Java_android_media_AudioTrack_play(JNIEnv *env, jobject this)
+JNIEXPORT void JNICALL Java_android_media_AudioTrack_native_1play(JNIEnv *env, jobject this)
 {
-	pthread_t periodic_notification_thread;
-	int ret;
-
 	jint period_time = _GET_INT_FIELD(this, "period_time");
 
 	// FIXME - this callback should probably be set up elsewhere
@@ -229,17 +226,15 @@ JNIEXPORT void JNICALL Java_android_media_AudioTrack_play(JNIEnv *env, jobject t
 /*--↑*/
 }
 
-JNIEXPORT jint JNICALL Java_android_media_AudioTrack_write(JNIEnv *env, jobject this, jbyteArray audioData, jint offsetInBytes, jint sizeInBytes)
+JNIEXPORT jint JNICALL Java_android_media_AudioTrack_native_1write(JNIEnv *env, jobject this, jbyteArray audioData, jint offsetInBytes, jint frames_to_write)
 {
 	int ret;
 
 	if(!PCM_DEVICE)
 		return 0; // STUB
 
-	jint channels = _GET_INT_FIELD(this, "channels");
 	snd_pcm_t *pcm_handle = _PTR(_GET_LONG_FIELD(this, "pcm_handle"));
 
-	snd_pcm_sframes_t frames_to_write = sizeInBytes / channels / 2; // FIXME - 2 means PCM16
 	snd_pcm_sframes_t frames_written;
 
 	jbyte *buffer = _GET_BYTE_ARRAY_ELEMENTS(audioData);
@@ -257,4 +252,5 @@ JNIEXPORT jint JNICALL Java_android_media_AudioTrack_write(JNIEnv *env, jobject
 //	printf("::::> tried to write %d frames, actually wrote %d frames.\n", frames_to_write, frames_written);
 
 	_RELEASE_BYTE_ARRAY_ELEMENTS(audioData, buffer);
+	return frames_written;
 }

src/api-impl-jni/generated_headers/android_media_AudioTrack.h

@@ -7,6 +7,12 @@
 #ifdef __cplusplus
 extern "C" {
 #endif
+#undef android_media_AudioTrack_PLAYSTATE_STOPPED
+#define android_media_AudioTrack_PLAYSTATE_STOPPED 1L
+#undef android_media_AudioTrack_PLAYSTATE_PAUSED
+#define android_media_AudioTrack_PLAYSTATE_PAUSED 2L
+#undef android_media_AudioTrack_PLAYSTATE_PLAYING
+#define android_media_AudioTrack_PLAYSTATE_PLAYING 3L
 /*
  * Class:     android_media_AudioTrack
  * Method:    native_constructor
@@ -25,18 +31,18 @@ JNIEXPORT jint JNICALL Java_android_media_AudioTrack_getMinBufferSize
 
 /*
  * Class:     android_media_AudioTrack
- * Method:    play
+ * Method:    native_play
  * Signature: ()V
  */
-JNIEXPORT void JNICALL Java_android_media_AudioTrack_play
+JNIEXPORT void JNICALL Java_android_media_AudioTrack_native_1play
   (JNIEnv *, jobject);
 
 /*
  * Class:     android_media_AudioTrack
- * Method:    write
+ * Method:    native_write
  * Signature: ([BII)I
  */
-JNIEXPORT jint JNICALL Java_android_media_AudioTrack_write
+JNIEXPORT jint JNICALL Java_android_media_AudioTrack_native_1write
   (JNIEnv *, jobject, jbyteArray, jint, jint);
 
 #ifdef __cplusplus

src/api-impl/android/media/AudioTrack.java

@@ -6,6 +6,10 @@ public class AudioTrack {
 		void onPeriodicNotification(AudioTrack track);
 	}
 
+	public static final int PLAYSTATE_STOPPED = 1;
+	public static final int PLAYSTATE_PAUSED  = 2;
+	public static final int PLAYSTATE_PLAYING = 3;
+
 	int streamType;
 	int sampleRateInHz;
 	int channelConfig;
@@ -13,6 +17,8 @@ public class AudioTrack {
 	int bufferSizeInBytes;
 	int mode;
 	private int sessionId;
+	private int playbackState = PLAYSTATE_STOPPED;
+	private int playbackHeadPosition = 0;
 
 	// for native code's use
 	long pcm_handle;
@@ -39,6 +45,9 @@ public class AudioTrack {
 			case 2:
 				num_channels = 1;
 				break;
+			case 12:
+				num_channels = 2;
+				break;
 			default:
 				num_channels = 1;
 		}
@@ -66,10 +75,15 @@ public class AudioTrack {
 		return this.frames;
 	}
 
-	public native void play();
+	public void play() {
+		System.out.println("calling AudioTrack.play()\n");
+		playbackState = PLAYSTATE_PLAYING;
+		native_play();
+	}
 
 	public void stop() {
 		System.out.println("calling stop(), how did this not get reported before DIDREEEEEEEEEEEEEEEEEEEEEEEEE\n");
+		playbackState = PLAYSTATE_STOPPED;
 	}
 
 	public void flush() {
@@ -81,12 +95,43 @@ public class AudioTrack {
 	}
 
 	public int getState() {
-		return 0; // TODO: fix up the native part and make this work properly
+		return 1; // TODO: fix up the native part and make this work properly
 	}
 
-	public native int write(byte[] audioData, int offsetInBytes, int sizeInBytes);
+	public int write(byte[] audioData, int offsetInBytes, int sizeInBytes) {
+		int framesToWrite = sizeInBytes / channels / 2;  // 2 means PCM16
+		int ret = native_write(audioData, offsetInBytes, framesToWrite);
+		if (ret > 0) {
+			playbackHeadPosition += ret;
+		}
+		return ret * channels * 2; // 2 means PCM16
+	}
 
 	public int getAudioSessionId() {
 		return sessionId;
 	}
+
+	public int getSampleRate() {
+		return sampleRateInHz;
+	}
+
+	public int setStereoVolume(float leftVolume, float rightVolume) {
+		return 0;
+	}
+
+	public int getPlayState() {
+		return playbackState;
+	}
+
+	public void pause() {
+		System.out.println("calling AudioTrack.pause()\n");
+		playbackState = PLAYSTATE_PAUSED;
+	}
+
+	public int getPlaybackHeadPosition() {
+		return playbackHeadPosition;
+	}
+
+	public native void native_play();
+	private native int native_write(byte[] audioData, int offsetInBytes, int sizeInBytes);
 }