| // 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. |
| // |
| // A fake implementation of AudioInputStream, useful for testing purpose. |
| |
| #ifndef MEDIA_AUDIO_FAKE_AUDIO_INPUT_STREAM_H_ |
| #define MEDIA_AUDIO_FAKE_AUDIO_INPUT_STREAM_H_ |
| |
| #include <vector> |
| |
| #include "base/files/file_path.h" |
| #include "base/memory/scoped_ptr.h" |
| #include "base/synchronization/lock.h" |
| #include "base/threading/thread.h" |
| #include "base/time/time.h" |
| #include "media/audio/audio_io.h" |
| #include "media/audio/audio_parameters.h" |
| #include "media/audio/sounds/wav_audio_handler.h" |
| #include "media/base/audio_converter.h" |
| |
| namespace media { |
| |
| class AudioBus; |
| class AudioManagerBase; |
| |
| // This class can either generate a beep sound or play audio from a file. |
| class MEDIA_EXPORT FakeAudioInputStream |
| : public AudioInputStream, AudioConverter::InputCallback { |
| public: |
| static AudioInputStream* MakeFakeStream( |
| AudioManagerBase* manager, const AudioParameters& params); |
| |
| bool Open() override; |
| void Start(AudioInputCallback* callback) override; |
| void Stop() override; |
| void Close() override; |
| double GetMaxVolume() override; |
| void SetVolume(double volume) override; |
| double GetVolume() override; |
| bool IsMuted() override; |
| bool SetAutomaticGainControl(bool enabled) override; |
| bool GetAutomaticGainControl() override; |
| |
| // Generate one beep sound. This method is called by |
| // FakeVideoCaptureDevice to test audio/video synchronization. |
| // This is a static method because FakeVideoCaptureDevice is |
| // disconnected from an audio device. This means only one instance of |
| // this class gets to respond, which is okay because we assume there's |
| // only one stream for this testing purpose. |
| // TODO(hclam): Make this non-static. To do this we'll need to fix |
| // crbug.com/159053 such that video capture device is aware of audio |
| // input stream. |
| static void BeepOnce(); |
| |
| private: |
| FakeAudioInputStream(AudioManagerBase* manager, |
| const AudioParameters& params); |
| ~FakeAudioInputStream() override; |
| |
| void DoCallback(); |
| |
| // Opens this stream reading from a |wav_filename| rather than beeping. |
| void OpenInFileMode(const base::FilePath& wav_filename); |
| |
| // Returns true if the device is playing from a file; false if we're beeping. |
| bool PlayingFromFile(); |
| |
| void PlayFile(); |
| void PlayBeep(); |
| |
| AudioManagerBase* audio_manager_; |
| AudioInputCallback* callback_; |
| scoped_ptr<uint8[]> buffer_; |
| int buffer_size_; |
| AudioParameters params_; |
| const scoped_refptr<base::SingleThreadTaskRunner> task_runner_; |
| base::TimeTicks last_callback_time_; |
| base::TimeDelta callback_interval_; |
| base::TimeDelta interval_from_last_beep_; |
| int beep_duration_in_buffers_; |
| int beep_generated_in_buffers_; |
| int beep_period_in_frames_; |
| scoped_ptr<media::AudioBus> audio_bus_; |
| scoped_ptr<uint8[]> wav_file_data_; |
| scoped_ptr<media::WavAudioHandler> wav_audio_handler_; |
| scoped_ptr<media::AudioConverter> file_audio_converter_; |
| int wav_file_read_pos_; |
| |
| // Allows us to run tasks on the FakeAudioInputStream instance which are |
| // bound by its lifetime. |
| base::WeakPtrFactory<FakeAudioInputStream> weak_factory_; |
| |
| // If running in file mode, this provides audio data from wav_audio_handler_. |
| double ProvideInput(AudioBus* audio_bus, |
| base::TimeDelta buffer_delay) override; |
| |
| DISALLOW_COPY_AND_ASSIGN(FakeAudioInputStream); |
| }; |
| |
| } // namespace media |
| |
| #endif // MEDIA_AUDIO_FAKE_AUDIO_INPUT_STREAM_H_ |