Expose latency methods through AudioManager and AudioTrack.
There's a longer term plan to fix audio/video sync, but
this gets the Java level to parity with the native level,
and allows applications in Java to achieve sync in the
same way as the native media player. APIs are left as hidden
for now.
Change-Id: Iaf70baac1ffb50ef48e03355163158568fbd0fe9
diff --git a/core/jni/android_media_AudioSystem.cpp b/core/jni/android_media_AudioSystem.cpp
index 0827f7c..67c2cfd 100644
--- a/core/jni/android_media_AudioSystem.cpp
+++ b/core/jni/android_media_AudioSystem.cpp
@@ -271,6 +271,17 @@
return (jint) AudioSystem::getPrimaryOutputFrameCount();
}
+static jint
+android_media_AudioSystem_getOutputLatency(JNIEnv *env, jobject clazz, jint stream)
+{
+ uint32_t afLatency;
+ if (AudioSystem::getOutputLatency(&afLatency, static_cast <audio_stream_type_t>(stream))
+ != NO_ERROR) {
+ afLatency = -1;
+ }
+ return (jint) afLatency;
+}
+
// ----------------------------------------------------------------------------
static JNINativeMethod gMethods[] = {
@@ -296,6 +307,7 @@
{"getDevicesForStream", "(I)I", (void *)android_media_AudioSystem_getDevicesForStream},
{"getPrimaryOutputSamplingRate", "()I", (void *)android_media_AudioSystem_getPrimaryOutputSamplingRate},
{"getPrimaryOutputFrameCount", "()I", (void *)android_media_AudioSystem_getPrimaryOutputFrameCount},
+ {"getOutputLatency", "(I)I", (void *)android_media_AudioSystem_getOutputLatency},
};
int register_android_media_AudioSystem(JNIEnv *env)