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Unified Diff: content/renderer/audio_input_device.h

Issue 7003053: Moves audio files from content\renderer\ to content\renderer\media. (Closed) Base URL: http://src.chromium.org/svn/trunk/src/
Patch Set: Created 9 years, 6 months ago
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Index: content/renderer/audio_input_device.h
===================================================================
--- content/renderer/audio_input_device.h (revision 88131)
+++ content/renderer/audio_input_device.h (working copy)
@@ -1,122 +0,0 @@
-// Copyright (c) 2011 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 CONTENT_RENDERER_AUDIO_INPUT_DEVICE_H_
-#define CONTENT_RENDERER_AUDIO_INPUT_DEVICE_H_
-#pragma once
-
-#include <vector>
-
-#include "base/basictypes.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/shared_memory.h"
-#include "base/threading/simple_thread.h"
-#include "content/renderer/audio_input_message_filter.h"
-
-struct AudioParameters;
-
-// Each instance of AudioInputDevice corresponds to one host stream.
-// This class is not thread-safe, so its methods must be called from
-// the same thread.
-
-// TODO(henrika): This class is based on the AudioDevice class and it has
-// many components in common. Investigate potential for re-factoring.
-class AudioInputDevice : public AudioInputMessageFilter::Delegate,
- public base::DelegateSimpleThread::Delegate,
- public base::RefCountedThreadSafe<AudioInputDevice> {
- public:
- class CaptureCallback {
- public:
- virtual void Capture(const std::vector<float*>& audio_data,
- size_t number_of_frames,
- size_t audio_delay_milliseconds) = 0;
- protected:
- virtual ~CaptureCallback() {}
- };
-
- // |buffer_size| is the number of sample-frames.
- AudioInputDevice(size_t buffer_size,
- int channels,
- double sample_rate,
- CaptureCallback* callback);
- virtual ~AudioInputDevice();
-
- // Starts audio capturing. Returns |true| on success.
- bool Start();
-
- // Stops audio capturing. Returns |true| on success.
- bool Stop();
-
- // Sets the capture volume scaling, with range [0.0, 1.0] inclusive.
- // Returns |true| on success.
- bool SetVolume(double volume);
-
- // Gets the capture volume scaling, with range [0.0, 1.0] inclusive.
- // Returns |true| on success.
- bool GetVolume(double* volume);
-
- double sample_rate() const { return sample_rate_; }
-
- size_t buffer_size() const { return buffer_size_; }
-
- private:
- // I/O thread backends to above functions.
- void InitializeOnIOThread(const AudioParameters& params);
- void StartOnIOThread();
- void ShutDownOnIOThread();
- void SetVolumeOnIOThread(double volume);
-
- // AudioInputMessageFilter::Delegate implementation
- virtual void OnLowLatencyCreated(base::SharedMemoryHandle handle,
- base::SyncSocket::Handle socket_handle,
- uint32 length);
- virtual void OnVolume(double volume);
-
- // DelegateSimpleThread::Delegate implementation.
- virtual void Run();
-
- // Format
- size_t buffer_size_; // in sample-frames
- int channels_;
- int bits_per_sample_;
- double sample_rate_;
-
- // Calls the client's callback for capturing audio.
- void FireCaptureCallback();
- CaptureCallback* callback_;
-
- // The client callback receives captured audio here.
- std::vector<float*> audio_data_;
-
- // The client stores the last reported audio delay in this member.
- // The delay shall reflect the amount of audio which still resides in
- // the input buffer, i.e., the expected audio input delay.
- int audio_delay_milliseconds_;
-
- // The current volume scaling [0.0, 1.0] of the audio stream.
- double volume_;
-
- // Callbacks for capturing audio occur on this thread.
- scoped_ptr<base::DelegateSimpleThread> audio_thread_;
-
- // IPC message stuff.
- base::SharedMemory* shared_memory() { return shared_memory_.get(); }
- base::SyncSocket* socket() { return socket_.get(); }
- void* shared_memory_data() { return shared_memory()->memory(); }
-
- // MessageFilter used to send/receive IPC. THIS MUST ONLY BE ACCESSED ON THE
- // I/O thread except to send messages and get the message loop.
- static scoped_refptr<AudioInputMessageFilter> filter_;
-
- // Our ID on the message filter. THIS MUST ONLY BE ACCESSED ON THE I/O THREAD
- // or else you could race with the initialize function which sets it.
- int32 stream_id_;
-
- scoped_ptr<base::SharedMemory> shared_memory_;
- scoped_ptr<base::SyncSocket> socket_;
-
- DISALLOW_IMPLICIT_CONSTRUCTORS(AudioInputDevice);
-};
-
-#endif // CONTENT_RENDERER_AUDIO_INPUT_DEVICE_H_

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