Forward the number of skipped frames by the OS in audio playout.

media/audio/win/audio_output_win_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <windows.h>
 #include <mmsystem.h>
 
 #include "base/basictypes.h"
 #include "base/base_paths.h"
 #include "base/memory/aligned_memory.h"
@@ skipping 28 matching lines @@
 
 // This class allows to find out if the callbacks are occurring as
 // expected and if any error has been reported.
 class TestSourceBasic : public AudioOutputStream::AudioSourceCallback {
  public:
   TestSourceBasic()
       : callback_count_(0),
         had_error_(0) {
   }
   // AudioSourceCallback::OnMoreData implementation:
-  int OnMoreData(AudioBus* audio_bus, uint32 total_bytes_delay) override {
+  int OnMoreData(AudioBus* audio_bus,
+                 uint32_t total_bytes_delay,
+                 uint32_t frames_skipped) override {
     ++callback_count_;
     // Touch the channel memory value to make sure memory is good.
     audio_bus->Zero();
     return audio_bus->frames();
   }
   // AudioSourceCallback::OnError implementation:
   void OnError(AudioOutputStream* stream) override { ++had_error_; }
   // Returns how many times OnMoreData() has been called.
   int callback_count() const {
     return callback_count_;
@@ skipping 447 matching lines @@
       : socket_(socket) {
     // Setup AudioBus wrapping data we'll receive over the sync socket.
     data_size_ = AudioBus::CalculateMemorySize(params);
     data_.reset(static_cast<float*>(
         base::AlignedAlloc(data_size_, AudioBus::kChannelAlignment)));
     audio_bus_ = AudioBus::WrapMemory(params, data_.get());
   }
   ~SyncSocketSource() override {}
 
   // AudioSourceCallback::OnMoreData implementation:
-  int OnMoreData(AudioBus* audio_bus, uint32 total_bytes_delay) override {
+  int OnMoreData(AudioBus* audio_bus,
+                 uint32_t total_bytes_delay,
+                 uint32_t frames_skipped) override {
     socket_->Send(&total_bytes_delay, sizeof(total_bytes_delay));
     uint32 size = socket_->Receive(data_.get(), data_size_);
     DCHECK_EQ(static_cast<size_t>(size) % sizeof(*audio_bus_->channel(0)), 0U);
     audio_bus_->CopyTo(audio_bus);
     return audio_bus_->frames();
   }
 
   // AudioSourceCallback::OnError implementation:
   void OnError(AudioOutputStream* stream) override {}
 
@@ skipping 30 matching lines @@
 
   SineWaveAudioSource sine(1, ctx.sine_freq, ctx.sample_rate);
   const int kTwoSecFrames = ctx.sample_rate * 2;
 
   uint32 total_bytes_delay = 0;
   int times = 0;
   for (int ix = 0; ix < kTwoSecFrames; ix += ctx.frames) {
     if (ctx.socket->Receive(&total_bytes_delay, sizeof(total_bytes_delay)) == 0)
       break;
     if ((times > 0) && (total_bytes_delay < 1000)) __debugbreak();
-    sine.OnMoreData(audio_bus.get(), total_bytes_delay);
+    sine.OnMoreData(audio_bus.get(), total_bytes_delay, 0);
     ctx.socket->Send(data.get(), ctx.packet_size_bytes);
     ++times;
   }
 
   return 0;
 }
 
 // Test the basic operation of AudioOutputStream used with a SyncSocket.
 // The emphasis is to verify that it is possible to feed data to the audio
 // layer using a source based on SyncSocket. In a real situation we would
@@ skipping 37 matching lines @@
   oas->Start(&source);
 
   ::WaitForSingleObject(thread, INFINITE);
   ::CloseHandle(thread);
 
   oas->Stop();
   oas->Close();
 }
 
 }  // namespace media