Switch audio synchronization from sleep() based to select() based.

media/audio/audio_device_thread.cc

Index: media/audio/audio_device_thread.cc
diff --git a/media/audio/audio_device_thread.cc b/media/audio/audio_device_thread.cc
index d5c1bbcebdc652b8d0cf1fd7ac222a1458af2ba7..59e701c885a132b4d5d43c587b1e52d0b1955875 100644
--- a/media/audio/audio_device_thread.cc
+++ b/media/audio/audio_device_thread.cc
@@ -157,6 +157,7 @@ void AudioDeviceThread::Thread::ThreadMain() {
 }
 
 void AudioDeviceThread::Thread::Run() {
+  uint32_t buffer_index = 0;
   while (true) {
     int pending_data = 0;
     size_t bytes_read = socket_.Receive(&pending_data, sizeof(pending_data));
@@ -165,9 +166,16 @@ void AudioDeviceThread::Thread::Run() {
       break;
     }
 
-    base::AutoLock auto_lock(callback_lock_);
-    if (callback_)
-      callback_->Process(pending_data);
+    {
+      base::AutoLock auto_lock(callback_lock_);
+      if (callback_)
+        callback_->Process(pending_data);
+    }
+
+    // Let AudioSyncReader know which buffer we just filled.
+    buffer_index++;

[henrika (OOO until Aug 14), 2013/08/20 07:50:30]

Perhaps I am missing something here but isn't new code required to deal with the
new Send call on the render side?

[tommi (sloooow) - chröme, 2013/08/20 10:55:57]

nit: ++buffer_index;

[DaleCurtis, 2013/09/11 01:16:03]

This is handled in the new WaitTilDataReady().

[DaleCurtis, 2013/09/11 01:16:03]

Done.

+    CHECK_EQ(socket_.Send(&buffer_index, sizeof(buffer_index)),
+             sizeof(buffer_index));
   }
 }