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| 1 // Copyright (c) 2012 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 MEDIA_AUDIO_PULSE_PULSE_INPUT_H_ |
| 6 #define MEDIA_AUDIO_PULSE_PULSE_INPUT_H_ |
| 7 |
| 8 #include <string> |
| 9 |
| 10 #include "media/audio/audio_device_name.h" |
| 11 #include "media/audio/audio_input_stream_impl.h" |
| 12 #include "media/audio/audio_io.h" |
| 13 #include "media/audio/audio_parameters.h" |
| 14 |
| 15 struct pa_context; |
| 16 struct pa_source_info; |
| 17 struct pa_stream; |
| 18 struct pa_threaded_mainloop; |
| 19 |
| 20 namespace media { |
| 21 |
| 22 class AudioManagerPulse; |
| 23 class SeekableBuffer; |
| 24 |
| 25 class PulseAudioInputStream : public AudioInputStreamImpl { |
| 26 public: |
| 27 PulseAudioInputStream(AudioManagerPulse* audio_manager, |
| 28 const std::string& device_name, |
| 29 const AudioParameters& params, |
| 30 pa_threaded_mainloop* mainloop, |
| 31 pa_context* context); |
| 32 |
| 33 virtual ~PulseAudioInputStream(); |
| 34 |
| 35 // Implementation of AudioInputStream. |
| 36 virtual bool Open() OVERRIDE; |
| 37 virtual void Start(AudioInputCallback* callback) OVERRIDE; |
| 38 virtual void Stop() OVERRIDE; |
| 39 virtual void Close() OVERRIDE; |
| 40 virtual double GetMaxVolume() OVERRIDE; |
| 41 virtual void SetVolume(double volume) OVERRIDE; |
| 42 virtual double GetVolume() OVERRIDE; |
| 43 |
| 44 private: |
| 45 // PulseAudio Callbacks. |
| 46 static void ReadCallback(pa_stream* handle, size_t length, void* user_data); |
| 47 static void StreamNotifyCallback(pa_stream* stream, void* user_data); |
| 48 static void VolumeCallback(pa_context* context, const pa_source_info* info, |
| 49 int error, void* user_data); |
| 50 |
| 51 // Helper for the ReadCallback. |
| 52 void ReadData(); |
| 53 |
| 54 AudioManagerPulse* audio_manager_; |
| 55 AudioInputCallback* callback_; |
| 56 std::string device_name_; |
| 57 AudioParameters params_; |
| 58 int channels_; |
| 59 double volume_; |
| 60 bool stream_started_; |
| 61 |
| 62 // Holds the data from the OS. |
| 63 scoped_ptr<media::SeekableBuffer> buffer_; |
| 64 |
| 65 // Temporary storage for recorded data. It gets a packet of data from |
| 66 // |buffer_| and deliver the data to OnData() callback. |
| 67 scoped_array<uint8> audio_data_buffer_; |
| 68 |
| 69 // PulseAudio API structs. |
| 70 pa_threaded_mainloop* pa_mainloop_; // Weak. |
| 71 pa_context* pa_context_; // Weak. |
| 72 pa_stream* handle_; |
| 73 |
| 74 // Flag indicating the state of the context has been changed. |
| 75 bool context_state_changed_; |
| 76 |
| 77 DISALLOW_COPY_AND_ASSIGN(PulseAudioInputStream); |
| 78 }; |
| 79 |
| 80 } // namespace media |
| 81 |
| 82 #endif // MEDIA_AUDIO_PULSE_PULSE_INPUT_H_ |
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