Index: media/audio/linux/pulse_output.h |
diff --git a/media/audio/linux/pulse_output.h b/media/audio/linux/pulse_output.h |
new file mode 100644 |
index 0000000000000000000000000000000000000000..b19ab1751f8e8d9a9363ed8d39a63fb4b61fe0b9 |
--- /dev/null |
+++ b/media/audio/linux/pulse_output.h |
@@ -0,0 +1,105 @@ |
+#ifndef MEDIA_AUDIO_LINUX_PULSE_OUTPUT_H_ |
sjl
2011/07/21 04:58:32
You need a chromium copyright header here.
slock
2011/07/21 17:10:57
Done.
|
+#define MEDIA_AUDIO_LINUX_PULSE_OUTPUT_H_ |
+ |
+#include <pulse/pulseaudio.h> |
+ |
+#include <string> |
+ |
+#include "base/memory/scoped_ptr.h" |
+#include "media/audio/audio_io.h" |
+#include "media/audio/audio_parameters.h" |
+ |
+namespace media { |
+class SeekableBuffer; |
+} |
+ |
+class AudioManagerLinux; |
+ |
+class PulseAudioOutputStream : public AudioOutputStream { |
+ public: |
+ PulseAudioOutputStream(const AudioParameters& params, |
+ AudioManagerLinux* manager); |
+ |
+ virtual ~PulseAudioOutputStream(); |
+ |
+ // Implementation of AudioOutputStream |
sjl
2011/07/21 04:58:32
End comments with a period.
slock
2011/07/21 17:10:57
Done.
|
+ virtual bool Open(); |
+ virtual void Close(); |
+ virtual void Start(AudioSourceCallback* callback); |
+ virtual void Stop(); |
+ virtual void SetVolume(double volume); |
+ virtual void GetVolume(double* volume); |
+ |
+ private: |
+ |
sjl
2011/07/21 04:58:32
Spurious blank line.
slock
2011/07/21 17:10:57
Done.
|
+ // Flags indicating the state of the stream. |
+ enum InternalState { |
+ kInError = 0, |
+ kCreated, |
+ kIsOpened, |
+ kIsPlaying, |
+ kIsStopped, |
+ kIsClosed |
+ }; |
sjl
2011/07/21 04:58:32
Blank line after the enum.
slock
2011/07/21 17:10:57
I should fix this in alsa_output.h too then I take
|
+ friend std::ostream& operator<<(std::ostream& os, InternalState); |
+ |
+ // Functions to safeguard state transitions. All changes to the object state |
+ // should go through these functions. |
+ bool CanTransitionTo(InternalState to); |
+ InternalState TransitionTo(InternalState to); |
+ InternalState state(); |
+ |
+ // API for Proxying calls to the AudioSourceCallback provided during Start(). |
+ uint32 RunDataCallback(uint8* dest, |
+ uint32 max_size, |
+ AudioBuffersState buffers_state); |
+ void RunErrorCallback(int code); |
+ |
+ // Changes the AudioSourceCallback to proxy calls to. Pass in NULL to release |
+ // ownership of the currently registered callback. |
+ void set_source_callback(AudioSourceCallback* callback); |
+ |
+ // Configuration constants from the constructor. Referencable by all threads |
+ // since they are constants. |
+ const ChannelLayout channel_layout_; |
+ const uint32 sample_rate_; |
+ const uint32 bytes_per_sample_; |
+ const uint32 bytes_per_frame_; |
+ |
+ // Device configuration data. Populated after OpenTask() completes. |
+ bool should_downmix_; |
+ bool should_swizzle_; |
+ uint32 packet_size_; |
+ uint32 micros_per_packet_; |
+ uint32 latency_micros_; |
+ uint32 bytes_per_output_frame_; |
+ uint32 pulse_buffer_frames_; |
+ |
+ // Flag indicating the code should stop reading from the data source or |
+ // writing to the PulseAudio server. This is set because the device has |
+ // entered an unrecoverable error state, or the Close() has executed. |
+ bool stop_stream_; |
+ |
+ // Audio manager that created us. Used to report that we've closed. |
+ AudioManagerLinux* manager_; |
+ |
+ // PulseAudio API structs. |
+ pa_mainloop* mainloop_; |
+ pa_mainloop_api* mainloop_api_; |
+ pa_context* context_; |
+ |
+ // Handle to the actual PulseAudio playback stream. |
+ pa_stream* playback_handle_; |
+ |
+ scoped_ptr<media::SeekableBuffer> buffer_; |
+ uint32 frames_per_packet_; |
+ |
+ InternalState state_; |
+ float volume_; // Volume level from 0.0 to 1.0. |
+ |
+ AudioSourceCallback* source_callback_; |
+ |
+ DISALLOW_COPY_AND_ASSIGN(PulseAudioOutputStream); |
+}; |
+ |
+#endif // MEDIA_AUDIO_LINUX_PULSE_OUTPUT_H_ |