Start and stop RTC event logs from private extension API.

chrome/browser/media/audio_debug_recordings_handler.h

Index: chrome/browser/media/audio_debug_recordings_handler.h
diff --git a/chrome/browser/media/audio_debug_recordings_handler.h b/chrome/browser/media/audio_debug_recordings_handler.h
new file mode 100644
index 0000000000000000000000000000000000000000..9511b6d095cf8b741e16a3d58fa375de49e9702e
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+++ b/chrome/browser/media/audio_debug_recordings_handler.h
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+// Copyright 2016 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.
+
+#ifndef CHROME_BROWSER_MEDIA_AUDIO_DEBUG_RECORDINGS_HANDLER_H_
+#define CHROME_BROWSER_MEDIA_AUDIO_DEBUG_RECORDINGS_HANDLER_H_
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include <string>
+
+#include "base/callback.h"
+#include "base/files/file_path.h"
+#include "base/memory/ref_counted.h"
+#include "base/threading/thread_checker.h"
+#include "base/time/time.h"
+
+namespace content {
+class RenderProcessHost;
+}  // namespace content
+
+class Profile;
+
+// AudioDebugRecordingsHandler provides an interface to start and stop
+// AudioDebugRecordings, including WebRTC AEC dumps.
+class AudioDebugRecordingsHandler
+    : public base::RefCountedThreadSafe<AudioDebugRecordingsHandler> {
+ public:
+  typedef base::Callback<void(bool, const std::string&)> GenericDoneCallback;
+  typedef base::Callback<void(const std::string&)> RecordingErrorCallback;
+  typedef base::Callback<void(const std::string&, bool, bool)>
+      RecordingDoneCallback;
+
+  // Key used to attach the handler to the RenderProcessHost
+  static const char kAudioDebugRecordingsHandlerKey[];
+
+  explicit AudioDebugRecordingsHandler(Profile* profile);
+
+  // Starts an audio debug recording. The recording lasts the given |delay|,
+  // unless |delay| is zero, in which case recording will continue until
+  // StopAudioDebugRecordings() is explicitly invoked.
+  // |callback| is invoked once recording stops. If |delay| is zero
+  // |callback| is invoked once recording starts.
+  // If a recording was already in progress, |error_callback| is invoked instead
+  // of |callback|.
+  void StartAudioDebugRecordings(content::RenderProcessHost* host,
+                                 base::TimeDelta delay,
+                                 const RecordingDoneCallback& callback,
+                                 const RecordingErrorCallback& error_callback);
+
+  // Stops an audio debug recording. |callback| is invoked once recording
+  // stops. If no recording was in progress, |error_callback| is invoked instead
+  // of |callback|.
+  void StopAudioDebugRecordings(content::RenderProcessHost* host,
+                                const RecordingDoneCallback& callback,
+                                const RecordingErrorCallback& error_callback);
+
+ private:
+  friend class base::RefCountedThreadSafe<AudioDebugRecordingsHandler>;
+
+  virtual ~AudioDebugRecordingsHandler();
+
+  base::FilePath GetLogDirectoryAndEnsureExists();
+
+  // Helper for starting audio debug recordings.
+  void DoStartAudioDebugRecordings(content::RenderProcessHost* host,
+                                   base::TimeDelta delay,
+                                   const RecordingDoneCallback& callback,
+                                   const RecordingErrorCallback& error_callback,
+                                   const base::FilePath& log_directory);
+
+  // Helper for stopping audio debug recordings.
+  void DoStopAudioDebugRecordings(content::RenderProcessHost* host,
+                                  bool is_manual_stop,
+                                  uint64_t audio_debug_recordings_id,
+                                  const RecordingDoneCallback& callback,
+                                  const RecordingErrorCallback& error_callback,
+                                  const base::FilePath& log_directory);
+
+  // The profile associated with our renderer process.
+  Profile* const profile_;
+
+  // Must be accessed on the UI thread.
+  bool is_audio_debug_recordings_in_progress_;
+
+  // This counter allows saving each debug recording in separate files.
+  uint64_t current_audio_debug_recordings_id_;
+
+  base::ThreadChecker thread_checker_;
+  DISALLOW_COPY_AND_ASSIGN(AudioDebugRecordingsHandler);
+};
+
+#endif  // CHROME_BROWSER_MEDIA_AUDIO_DEBUG_RECORDINGS_HANDLER_H_