link media.metrics native strings to api-controlled java strings
add comments to native media.metrics code pointing to how they
are (and aren't) to be kept in synch with their java counterparts
that are part of the public API (and therefore pretty much fixed).
Bug: 72492234
Test: compilation
Change-Id: Ic096545a5cdfb2160c6b66438d345d8e625384b9
diff --git a/media/libaudioclient/AudioTrack.cpp b/media/libaudioclient/AudioTrack.cpp
index 55954f2..d6cc5e8 100644
--- a/media/libaudioclient/AudioTrack.cpp
+++ b/media/libaudioclient/AudioTrack.cpp
@@ -185,11 +185,16 @@
// key for media statistics is defined in the header
// attrs for media statistics
+ // NB: these are matched with public Java API constants defined
+ // in frameworks/base/media/java/android/media/AudioTrack.java
+ // These must be kept synchronized with the constants there.
static constexpr char kAudioTrackStreamType[] = "android.media.audiotrack.streamtype";
static constexpr char kAudioTrackContentType[] = "android.media.audiotrack.type";
static constexpr char kAudioTrackUsage[] = "android.media.audiotrack.usage";
static constexpr char kAudioTrackSampleRate[] = "android.media.audiotrack.samplerate";
static constexpr char kAudioTrackChannelMask[] = "android.media.audiotrack.channelmask";
+
+ // NB: These are not yet exposed as public Java API constants.
static constexpr char kAudioTrackUnderrunFrames[] = "android.media.audiotrack.underrunframes";
static constexpr char kAudioTrackStartupGlitch[] = "android.media.audiotrack.glitch.startup";