Improved audio buffer handling for iOS

webrtc/modules/audio_device/android/opensles_player.cc

Index: webrtc/modules/audio_device/android/opensles_player.cc
diff --git a/webrtc/modules/audio_device/android/opensles_player.cc b/webrtc/modules/audio_device/android/opensles_player.cc
index 2d305f0ff7406ae67d1aeb1feee2185c80f025dd..f79f4f6ee7b6813d97ea78fb703e48e48fc40b05 100644
--- a/webrtc/modules/audio_device/android/opensles_player.cc
+++ b/webrtc/modules/audio_device/android/opensles_player.cc
@@ -12,6 +12,7 @@
 
 #include <android/log.h>
 
+#include "webrtc/base/array_view.h"
 #include "webrtc/base/arraysize.h"
 #include "webrtc/base/checks.h"
 #include "webrtc/base/format_macros.h"
@@ -209,9 +210,9 @@ void OpenSLESPlayer::AllocateDataBuffers() {
   ALOGD("native buffer size: %" PRIuS, buffer_size_in_bytes);
   ALOGD("native buffer size in ms: %.2f",
         audio_parameters_.GetBufferSizeInMilliseconds());
-  fine_audio_buffer_.reset(
-      new FineAudioBuffer(audio_device_buffer_, buffer_size_in_bytes,
-                          audio_parameters_.sample_rate()));
+  fine_audio_buffer_.reset(new FineAudioBuffer(audio_device_buffer_,
+                                               audio_parameters_.sample_rate(),
+                                               2 * buffer_size_in_bytes));

[kwiberg-webrtc, 2017/05/30 07:58:19]

Not necessary right now, but you can avoid the "new" and use MakeUnique instead:

  fine_audio_buffer_ = MakeUnique<FineAudioBuffer>(audio_device_buffer_, ...);

In the future, we'll probably make an effort to avoid "new" just like we're
already avoiding "delete".

   // Allocated memory for audio buffers.
   for (int i = 0; i < kNumOfOpenSLESBuffers; ++i) {
     audio_buffers_[i].reset(new SLint8[buffer_size_in_bytes]);
@@ -398,7 +399,8 @@ void OpenSLESPlayer::EnqueuePlayoutData(bool silence) {
     // Read audio data from the WebRTC source using the FineAudioBuffer object
     // to adjust for differences in buffer size between WebRTC (10ms) and native
     // OpenSL ES.
-    fine_audio_buffer_->GetPlayoutData(audio_ptr);
+    fine_audio_buffer_->GetPlayoutData(rtc::ArrayView<SLint8>(
+        audio_ptr, audio_parameters_.GetBytesPerBuffer()));
   }
   // Enqueue the decoded audio buffer for playback.
   SLresult err = (*simple_buffer_queue_)