Fix audio capture buffer handling on Android.

media/audio/android/opensles_input.cc

Index: media/audio/android/opensles_input.cc
===================================================================
--- media/audio/android/opensles_input.cc	(revision 201897)
+++ media/audio/android/opensles_input.cc	(working copy)
@@ -71,7 +71,7 @@
 
   SLresult err = SL_RESULT_UNKNOWN_ERROR;
   // Enqueues |kNumOfQueuesInBuffer| zero buffers to get the ball rolling.
-  for (int i = 0; i < kNumOfQueuesInBuffer - 1; ++i) {
+  for (int i = 0; i < kNumOfQueuesInBuffer; ++i) {
     err = (*simple_buffer_queue_)->Enqueue(
         simple_buffer_queue_,
         audio_data_[i],
@@ -187,7 +187,7 @@
 
   // Audio sink configuration.
   SLDataLocator_AndroidSimpleBufferQueue buffer_queue = {
-    SL_DATALOCATOR_ANDROIDSIMPLEBUFFERQUEUE, // Locator type.
+    SL_DATALOCATOR_ANDROIDSIMPLEBUFFERQUEUE,  // Locator type.
     static_cast<SLuint32>(kNumOfQueuesInBuffer)  // Number of buffers.
   };
   SLDataSink audio_sink = { &buffer_queue, &format_ };
@@ -258,7 +258,14 @@
   if (!started_)
     return;
 
-  // Get the enqueued buffer from the soundcard.
+  // TODO(xians): Get an accurate delay estimation.
+  callback_->OnData(this,
+                    audio_data_[active_queue_],
+                    buffer_size_bytes_,
+                    buffer_size_bytes_,
+                    0.0);
+
+  // Done with this buffer. Send it to device for recording.
   SLresult err = (*simple_buffer_queue_)->Enqueue(
       simple_buffer_queue_,
       audio_data_[active_queue_],
@@ -266,13 +273,6 @@
   if (SL_RESULT_SUCCESS != err)
     HandleError(err);
 
-  // TODO(xians): Get an accurate delay estimation.
-  callback_->OnData(this,
-                    audio_data_[active_queue_],
-                    buffer_size_bytes_,
-                    buffer_size_bytes_,
-                    0.0);
-
   active_queue_ = (active_queue_ + 1) % kNumOfQueuesInBuffer;
 }