Implement writing mic audio input data to file for debugging purposes.

content/browser/renderer_host/media/audio_input_renderer_host.h

 // 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.
 //
 // AudioInputRendererHost serves audio related requests from audio capturer
 // which lives inside the render process and provide access to audio hardware.
 //
 // Create stream sequence (AudioInputController = AIC):
 //
 // AudioInputHostMsg_CreateStream -> OnCreateStream -> AIC::CreateLowLatency ->
@@ skipping 14 matching lines @@
 #define CONTENT_BROWSER_RENDERER_HOST_MEDIA_AUDIO_INPUT_RENDERER_HOST_H_
 
 #include <map>
 #include <string>
 
 #include "base/compiler_specific.h"
 #include "base/gtest_prod_util.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/shared_memory.h"
+#include "base/memory/weak_ptr.h"
 #include "base/process/process.h"
 #include "base/sequenced_task_runner_helpers.h"
 #include "content/common/media/audio_messages.h"
 #include "content/public/browser/browser_message_filter.h"
 #include "content/public/browser/browser_thread.h"
 #include "media/audio/audio_input_controller.h"
 #include "media/audio/audio_io.h"
 #include "media/audio/audio_logging.h"
 #include "media/audio/simple_sources.h"
 
 namespace media {
 class AudioManager;
 class AudioParameters;
 class UserInputMonitor;
 }
 
 namespace content {
 class AudioMirroringManager;
 class MediaStreamManager;
+class RenderProcessHost;
 
 class CONTENT_EXPORT AudioInputRendererHost
     : public BrowserMessageFilter,
       public media::AudioInputController::EventHandler {
  public:
 
   // Error codes to make native loggin more clear. These error codes are added
   // to generic error strings to provide a higher degree of details.
   // Changing these values can lead to problems when matching native debug
   // logs with the actual cause of error.
@@ skipping 31 matching lines @@
     // Unable to prepare the foreign socket handle.
     SYNC_SOCKET_ERROR,  // = 10
 
     // This error message comes from the AudioInputController instance.
     AUDIO_INPUT_CONTROLLER_ERROR,  // = 11
   };
 
   // Called from UI thread from the owner of this object.
   // |user_input_monitor| is used for typing detection and can be NULL.
   AudioInputRendererHost(int render_process_id,
+                         int32 renderer_pid,
                          media::AudioManager* audio_manager,
                          MediaStreamManager* media_stream_manager,
                          AudioMirroringManager* audio_mirroring_manager,
                          media::UserInputMonitor* user_input_monitor);
 
+#if defined(ENABLE_WEBRTC)
+  // Enable and disable debug recording of input on all audio entries.
+  void EnableDebugRecording(const base::FilePath& file);
+  void DisableDebugRecording();
+#endif
+
   // BrowserMessageFilter implementation.
   void OnChannelClosing() override;
   void OnDestruct() const override;
   bool OnMessageReceived(const IPC::Message& message) override;
 
   // AudioInputController::EventHandler implementation.
   void OnCreated(media::AudioInputController* controller) override;
   void OnRecording(media::AudioInputController* controller) override;
   void OnError(media::AudioInputController* controller,
                media::AudioInputController::ErrorCode error_code) override;
   void OnData(media::AudioInputController* controller,
               const media::AudioBus* data) override;
   void OnLog(media::AudioInputController* controller,
              const std::string& message) override;
 
+  // Sets the PID renderer. This is used for constructing the debug recording
+  // filename.
+  void set_renderer_pid(int32 renderer_pid);
+
  private:
   // TODO(henrika): extend test suite (compare AudioRenderHost)
   friend class BrowserThread;
   friend class TestAudioInputRendererHost;
   friend class base::DeleteHelper<AudioInputRendererHost>;
 
   struct AudioEntry;
   typedef std::map<int, AudioEntry*> AudioEntryMap;
 
   ~AudioInputRendererHost() override;
@@ skipping 68 matching lines @@
   // Search for a AudioEntry having the reference to |controller|.
   // This method is used to look up an AudioEntry after a controller
   // event is received.
   AudioEntry* LookupByController(media::AudioInputController* controller);
 
   // If ChromeOS and |config|'s layout has keyboard mic, unregister in
   // AudioInputDeviceManager.
   void MaybeUnregisterKeyboardMicStream(
       const AudioInputHostMsg_CreateStream_Config& config);
 
+#if defined(ENABLE_WEBRTC)
+  void MaybeEnableDebugRecordingForId(int stream_id);
+
+  base::FilePath GetDebugRecordingFilePathWithExtensions(
+      const base::FilePath& file);
+
+  void EnableDebugRecordingForId(const base::FilePath& file, int stream_id);
+
+  void DoEnableDebugRecording(int stream_id, base::File file);
+  void DoDisableDebugRecording(int stream_id);
+
+  // Delete the debug writer used for debug recordings for |stream_id|.
+  void DeleteDebugWriter(int stream_id);
+#endif
+
   // ID of the RenderProcessHost that owns this instance.
   const int render_process_id_;
 
+  // PID of the render process connected to the RenderProcessHost that owns this
+  // instance.
+  int32 renderer_pid_;
+
   // Used to create an AudioInputController.
   media::AudioManager* audio_manager_;
 
   // Used to access to AudioInputDeviceManager.
   MediaStreamManager* media_stream_manager_;
 
   AudioMirroringManager* audio_mirroring_manager_;
 
   // A map of stream IDs to audio sources.
   AudioEntryMap audio_entries_;
 
   // Raw pointer of the UserInputMonitor.
   media::UserInputMonitor* user_input_monitor_;
 
   scoped_ptr<media::AudioLog> audio_log_;
 
+  base::WeakPtrFactory<AudioInputRendererHost> weak_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(AudioInputRendererHost);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_AUDIO_INPUT_RENDERER_HOST_H_