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| 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #ifndef PPAPI_SHARED_IMPL_AUDIO_INPUT_IMPL_H_ | |
| 6 #define PPAPI_SHARED_IMPL_AUDIO_INPUT_IMPL_H_ | |
| 7 | |
| 8 #include "base/memory/scoped_ptr.h" | |
| 9 #include "base/shared_memory.h" | |
| 10 #include "base/sync_socket.h" | |
| 11 #include "base/threading/simple_thread.h" | |
| 12 #include "ppapi/c/dev/ppb_audio_input_dev.h" | |
| 13 #include "ppapi/shared_impl/resource.h" | |
| 14 #include "ppapi/thunk/ppb_audio_input_api.h" | |
| 15 | |
| 16 namespace ppapi { | |
| 17 | |
| 18 // Implements the logic to map shared memory and run the audio thread signaled | |
| 19 // from the sync socket. Both the proxy and the renderer implementation use | |
| 20 // this code. | |
| 21 class PPAPI_SHARED_EXPORT AudioInputImpl | |
| 22 : public thunk::PPB_AudioInput_API, | |
| 23 public base::DelegateSimpleThread::Delegate { | |
| 24 public: | |
| 25 AudioInputImpl(); | |
| 26 virtual ~AudioInputImpl(); | |
| 27 | |
| 28 bool capturing() const { return capturing_; } | |
| 29 | |
| 30 // Sets the callback information that the background thread will use. This | |
| 31 // is optional. Without a callback, the thread will not be run. This | |
| 32 // non-callback mode is used in the renderer with the proxy, since the proxy | |
| 33 // handles the callback entirely within the plugin process. | |
| 34 void SetCallback(PPB_AudioInput_Callback callback, void* user_data); | |
| 35 | |
| 36 // Configures the current state to be playing or not. The caller is | |
| 37 // responsible for ensuring the new state is the opposite of the current one. | |
| 38 // | |
| 39 // This is the implementation for PPB_AudioInput.Start/StopCapture, except | |
| 40 // that it does not actually notify the audio system to stop capture, it just | |
| 41 // configures our object to stop generating callbacks. The actual stop | |
| 42 // playback request will be done in the derived classes and will be different | |
| 43 // from the proxy and the renderer. | |
| 44 void SetStartCaptureState(); | |
| 45 void SetStopCaptureState(); | |
| 46 | |
| 47 // Sets the shared memory and socket handles. This will automatically start | |
| 48 // playback if we're currently set to play. | |
| 49 void SetStreamInfo(base::SharedMemoryHandle shared_memory_handle, | |
| 50 size_t shared_memory_size, | |
| 51 base::SyncSocket::Handle socket_handle); | |
| 52 | |
| 53 private: | |
| 54 // Starts execution of the audio input thread. | |
| 55 void StartThread(); | |
| 56 | |
| 57 // DelegateSimpleThread::Delegate implementation. | |
| 58 // Run on the audio input thread. | |
| 59 virtual void Run(); | |
| 60 | |
| 61 // True if capturing the stream. | |
| 62 bool capturing_; | |
| 63 | |
| 64 // Socket used to notify us when audio is ready to accept new samples. This | |
| 65 // pointer is created in StreamCreated(). | |
| 66 scoped_ptr<base::SyncSocket> socket_; | |
| 67 | |
| 68 // Sample buffer in shared memory. This pointer is created in | |
| 69 // StreamCreated(). The memory is only mapped when the audio thread is | |
| 70 // created. | |
| 71 scoped_ptr<base::SharedMemory> shared_memory_; | |
| 72 | |
| 73 // The size of the sample buffer in bytes. | |
| 74 size_t shared_memory_size_; | |
| 75 | |
| 76 // When the callback is set, this thread is spawned for calling it. | |
| 77 scoped_ptr<base::DelegateSimpleThread> audio_input_thread_; | |
| 78 | |
| 79 // Callback to call when audio is ready to produce new samples. | |
| 80 PPB_AudioInput_Callback callback_; | |
| 81 | |
| 82 // User data pointer passed verbatim to the callback function. | |
| 83 void* user_data_; | |
| 84 }; | |
| 85 | |
| 86 } // namespace ppapi | |
| 87 | |
| 88 #endif // PPAPI_SHARED_IMPL_AUDIO_INPUT_IMPL_H_ | |
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