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| 1 // Copyright 2013 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_UNIFIED_H_ | |
| 6 #define MEDIA_AUDIO_PULSE_PULSE_UNIFIED_H_ | |
| 7 | |
| 8 #include <pulse/pulseaudio.h> | |
| 9 #include <string> | |
| 10 | |
| 11 #include "base/memory/scoped_ptr.h" | |
| 12 #include "media/audio/audio_io.h" | |
| 13 #include "media/audio/audio_parameters.h" | |
| 14 #include "media/base/audio_fifo.h" | |
| 15 | |
| 16 namespace media { | |
| 17 | |
| 18 class AudioManagerBase; | |
| 19 class SeekableBuffer; | |
| 20 | |
| 21 class PulseAudioUnifiedStream : public AudioOutputStream { | |
| 22 public: | |
| 23 PulseAudioUnifiedStream(const AudioParameters& params, | |
| 24 const std::string& input_device_id, | |
| 25 AudioManagerBase* manager); | |
| 26 | |
| 27 virtual ~PulseAudioUnifiedStream(); | |
| 28 | |
| 29 // Implementation of PulseAudioUnifiedStream. | |
| 30 virtual bool Open() OVERRIDE; | |
| 31 virtual void Close() OVERRIDE; | |
| 32 virtual void Start(AudioSourceCallback* callback) OVERRIDE; | |
| 33 virtual void Stop() OVERRIDE; | |
| 34 virtual void SetVolume(double volume) OVERRIDE; | |
| 35 virtual void GetVolume(double* volume) OVERRIDE; | |
| 36 | |
| 37 private: | |
| 38 // Called by PulseAudio when |pa_stream_| change state. If an unexpected | |
| 39 // failure state change happens and |source_callback_| is set | |
| 40 // this method will forward the error via OnError(). | |
| 41 static void StreamNotifyCallback(pa_stream* s, void* user_data); | |
| 42 | |
| 43 // Called by PulseAudio recording stream when it has data. | |
| 44 static void ReadCallback(pa_stream* s, size_t length, void* user_data); | |
| 45 | |
| 46 // Helpers for ReadCallback() to read and write data. | |
| 47 void WriteData(size_t requested_bytes); | |
| 48 void ReadData(); | |
| 49 | |
| 50 // Close() helper function to free internal structs. | |
| 51 void Reset(); | |
| 52 | |
| 53 // AudioParameters from the constructor. | |
| 54 const AudioParameters params_; | |
| 55 | |
| 56 // Device unique ID of the input device. | |
| 57 const std::string input_device_id_; | |
| 58 | |
| 59 // Audio manager that created us. Used to report that we've closed. | |
| 60 AudioManagerBase* manager_; | |
| 61 | |
| 62 // PulseAudio API structs. | |
| 63 pa_context* pa_context_; | |
| 64 pa_threaded_mainloop* pa_mainloop_; | |
| 65 pa_stream* input_stream_; | |
| 66 pa_stream* output_stream_; | |
| 67 | |
| 68 // Float representation of volume from 0.0 to 1.0. | |
| 69 float volume_; | |
| 70 | |
| 71 // Callback to audio data source. Must only be modified while holding a lock | |
| 72 // on |pa_mainloop_| via pa_threaded_mainloop_lock(). | |
| 73 AudioSourceCallback* source_callback_; | |
| 74 | |
| 75 scoped_ptr<AudioBus> input_bus_; | |
| 76 scoped_ptr<AudioBus> output_bus_; | |
| 77 | |
| 78 // Used for input to output buffering. | |
| 79 scoped_ptr<media::SeekableBuffer> fifo_; | |
| 80 | |
| 81 // Temporary storage for recorded data. It gets a packet of data from | |
| 82 // |fifo_| and deliver the data to OnMoreIOData() callback. | |
| 83 scoped_ptr<uint8[]> input_data_buffer_; | |
| 84 | |
| 85 DISALLOW_COPY_AND_ASSIGN(PulseAudioUnifiedStream); | |
| 86 }; | |
| 87 | |
| 88 } // namespace media | |
| 89 | |
| 90 #endif // MEDIA_AUDIO_PULSE_PULSE_UNIFIED_H_ | |
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Chromium Code Reviews
Issue 163343002:
Reland 153623004: Remove the unified IO code on the browser (Closed)
Base URL: http://git.chromium.org/chromium/src.git@master