Lock scheme #4: Introduced the render sample queue for the aec and aecm

webrtc/modules/audio_processing/echo_control_mobile_impl.h

Index: webrtc/modules/audio_processing/echo_control_mobile_impl.h
diff --git a/webrtc/modules/audio_processing/echo_control_mobile_impl.h b/webrtc/modules/audio_processing/echo_control_mobile_impl.h
index da7022545f245171a3353a59f55fc991273d57f6..88137e27dfedd6c50930888d023939b23b5842a4 100644
--- a/webrtc/modules/audio_processing/echo_control_mobile_impl.h
+++ b/webrtc/modules/audio_processing/echo_control_mobile_impl.h
@@ -11,11 +11,31 @@
 #ifndef WEBRTC_MODULES_AUDIO_PROCESSING_ECHO_CONTROL_MOBILE_IMPL_H_
 #define WEBRTC_MODULES_AUDIO_PROCESSING_ECHO_CONTROL_MOBILE_IMPL_H_
 
+#include "webrtc/base/scoped_ptr.h"
+#include "webrtc/common_audio/swap_queue.h"
 #include "webrtc/modules/audio_processing/include/audio_processing.h"
 #include "webrtc/modules/audio_processing/processing_component.h"
 
 namespace webrtc {
 
+namespace {

[hlundin-webrtc, 2015/11/05 12:57:02]

"Do not use unnamed namespaces in .h files."
https://google.github.io/styleguide/cppguide.html#Namespaces

[peah-webrtc, 2015/11/06 06:55:04]

Done.

+// Functor to use when supplying a verifier function for the queue item
+// verifcation.
+class AecmRenderQueueItemVerifier {
+ public:
+  explicit AecmRenderQueueItemVerifier(size_t minimum_capacity)
+      : minimum_capacity_(minimum_capacity) {}
+
+  bool operator()(const std::vector<int16_t>& v) const {
+    return v.capacity() >= minimum_capacity_;
+  }
+
+ private:
+  size_t minimum_capacity_;
+};
+
+}  // namespace anonymous
+
 class AudioBuffer;
 class CriticalSectionWrapper;
 
@@ -37,7 +57,16 @@ class EchoControlMobileImpl : public EchoControlMobile,
   // ProcessingComponent implementation.
   int Initialize() override;
 
+  // Reads render side data that has been queued on the render call.
+  void ReadQueuedRenderData();
+
  private:
+  static const size_t kAllowedValuesOfSamplesPerFrame1 = 80;
+  static const size_t kAllowedValuesOfSamplesPerFrame2 = 160;
+  // TODO(peah): Decrease this once we properly handle hugely unbalanced
+  // reverse and forward call numbers.
+  static const size_t kMaxNumFramesToBuffer = 100;
+
   // EchoControlMobile implementation.
   int Enable(bool enable) override;
   int set_routing_mode(RoutingMode mode) override;
@@ -53,11 +82,19 @@ class EchoControlMobileImpl : public EchoControlMobile,
   int num_handles_required() const override;
   int GetHandleError(void* handle) const override;
 
+  void AllocateRenderQueue();
+
   const AudioProcessing* apm_;
   CriticalSectionWrapper* crit_;
   RoutingMode routing_mode_;
   bool comfort_noise_enabled_;
   unsigned char* external_echo_path_;
+
+  size_t render_queue_element_max_size_;
+  std::vector<int16_t> render_queue_buffer_;
+  std::vector<int16_t> capture_queue_buffer_;
+  rtc::scoped_ptr<SwapQueue<std::vector<int16_t>, AecmRenderQueueItemVerifier>>
+      render_signal_queue_;
 };
 }  // namespace webrtc