Implement android.media.AudioManager.getProperty() (c6c4365d) · Commits · e / os / android_frameworks_base

core/jni/android_media_AudioSystem.cpp

+14 −0

Original line number	Diff line number	Diff line
		@@ -242,6 +242,18 @@ android_media_AudioSystem_getDevicesForStream(JNIEnv *env, jobject thiz, jint st
		return (jint) AudioSystem::getDevicesForStream(static_cast <audio_stream_type_t>(stream));
		}

		static jint
		android_media_AudioSystem_getPrimaryOutputSamplingRate(JNIEnv *env, jobject clazz)
		{
		return (jint) AudioSystem::getPrimaryOutputSamplingRate();
		}

		static jint
		android_media_AudioSystem_getPrimaryOutputFrameCount(JNIEnv *env, jobject clazz)
		{
		return (jint) AudioSystem::getPrimaryOutputFrameCount();
		}

		// ----------------------------------------------------------------------------

		static JNINativeMethod gMethods[] = {
		@@ -263,6 +275,8 @@ static JNINativeMethod gMethods[] = {
		{"setMasterMute", "(Z)I", (void *)android_media_AudioSystem_setMasterMute},
		{"getMasterMute", "()Z", (void *)android_media_AudioSystem_getMasterMute},
		{"getDevicesForStream", "(I)I", (void *)android_media_AudioSystem_getDevicesForStream},
		{"getPrimaryOutputSamplingRate", "()I", (void *)android_media_AudioSystem_getPrimaryOutputSamplingRate},
		{"getPrimaryOutputFrameCount", "()I", (void *)android_media_AudioSystem_getPrimaryOutputFrameCount},
		};

		int register_android_media_AudioSystem(JNIEnv *env)

+10 −2

Original line number	Diff line number	Diff line
		@@ -2474,8 +2474,16 @@ public class AudioManager {
		* or null if there is no value for that key.
		*/
		public String getProperty(String key) {
		// implementation to be written
		if (PROPERTY_OUTPUT_SAMPLE_RATE.equals(key)) {
		int outputSampleRate = AudioSystem.getPrimaryOutputSamplingRate();
		return outputSampleRate > 0 ? Integer.toString(outputSampleRate) : null;
		} else if (PROPERTY_OUTPUT_FRAMES_PER_BUFFER.equals(key)) {
		int outputFramesPerBuffer = AudioSystem.getPrimaryOutputFrameCount();
		return outputFramesPerBuffer > 0 ? Integer.toString(outputFramesPerBuffer) : null;
		} else {
		// null or unknown key
		return null;
		}
		}

		}

+5 −0

Original line number	Diff line number	Diff line
		@@ -381,4 +381,9 @@ public class AudioSystem
		public static native int setMasterMute(boolean mute);
		public static native boolean getMasterMute();
		public static native int getDevicesForStream(int stream);

		// helpers for android.media.AudioManager.getProperty(), see description there for meaning
		public static native int getPrimaryOutputSamplingRate();
		public static native int getPrimaryOutputFrameCount();

		}