Enable silence detection and don't driver the audio encoder

or send any audio out over the network if we've seen at least one second
of silence.

Change-Id: Ic2bca4ce7d55bd246283dc669f5f5cb6106d88ea
related-to-bug: 7248248

1 files changed, 9 insertions, 0 deletions

diff --git a/media/libstagefright/wifi-display/source/Converter.h b/media/libstagefright/wifi-display/source/Converter.h
index 9f54523..93ff72f 100644
--- a/media/libstagefright/wifi-display/source/Converter.h
+++ b/media/libstagefright/wifi-display/source/Converter.h
@@ -25,6 +25,8 @@ namespace android {
 struct ABuffer;
 struct MediaCodec;
 
+#define ENABLE_SILENCE_DETECTION        1
+
 // Utility class that receives media access units and converts them into
 // media access unit of a different format.
 // Right now this'll convert raw video into H.264 and raw audio into AAC.
@@ -83,6 +85,11 @@ private:
 
     bool mDoMoreWorkPending;
 
+#if ENABLE_SILENCE_DETECTION
+    int64_t mFirstSilentFrameUs;
+    bool mInSilentMode;
+#endif
+
     status_t initEncoder();
 
     status_t feedEncoderInputBuffers();
@@ -92,6 +99,8 @@ private:
 
     void notifyError(status_t err);
 
+    static bool IsSilence(const sp<ABuffer> &accessUnit);
+
     DISALLOW_EVIL_CONSTRUCTORS(Converter);
 };