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..c99d658d732235496679c2dd39ae6c5b9e7e92e8 |
--- /dev/null |
+++ b/media/audio/linux/pulse_output.h |
@@ -0,0 +1,126 @@ |
+// Copyright (c) 2011 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. |
+ |
+#ifndef MEDIA_AUDIO_LINUX_PULSE_OUTPUT_H_ |
+#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. |
+ virtual bool Open(); |
+ virtual void Close(); |
+ virtual void Start(AudioSourceCallback* callback); |
+ virtual void Stop(); |
+ virtual void SetVolume(double volume); |
+ virtual void GetVolume(double* volume); |
+ |
+ void BufferPacketInClient(); |
vrk (LEFT CHROMIUM)
2011/08/05 15:02:26
As I note in the .cc file, I think you can make th
slock
2011/08/08 20:30:15
Done.
|
+ media::SeekableBuffer* client_buffer_; |
vrk (LEFT CHROMIUM)
2011/08/05 15:02:26
Make these fields private
vrk (LEFT CHROMIUM)
2011/08/05 15:02:26
scoped_ptr instead?
slock
2011/08/08 20:30:15
Done.
slock
2011/08/08 20:30:15
Done.
|
+ bool source_exhausted_; |
+ |
+ private: |
+ // Flags indicating the state of the stream. |
+ enum InternalState { |
vrk (LEFT CHROMIUM)
2011/08/05 15:02:26
Please delete all unused/unimplemented private fie
slock
2011/08/08 20:30:15
Done. Pretty sure I got them all.
|
+ kInError = 0, |
+ kCreated, |
+ kIsOpened, |
+ kIsPlaying, |
+ kIsStopped, |
+ kIsClosed |
+ }; |
+ |
+ friend std::ostream& operator<<(std::ostream& os, InternalState); |
+ |
+ // Functions to get another packet from the data source and write it into the |
+ // PulseAudio device. |
+ void ClientBufferLoop(); |
+ |
+ // 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 pa_sample_format_t sample_format_; |
+ 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 server_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_; |
+ |
+ // Flag indicating that the there is no more data available to buffer. |
+ |
+ // Audio manager that created us. Used to report that we've closed. |
+ AudioManagerLinux* manager_; |
+ |
+ // PulseAudio API structs. |
+ pa_mainloop* pa_mainloop_; |
+ pa_mainloop_api* pa_mainloop_api_; |
+ pa_context* pa_context_; |
+ |
+ // PulseAudio attribute and specification structs. |
+ pa_sample_spec* pa_sample_specs_; |
+ pa_buffer_attr* pa_buffer_attributes_; |
+ |
+ // Handle to the actual PulseAudio playback stream. |
+ pa_stream* playback_handle_; |
+ |
+ uint32 frames_per_packet_; |
+ |
+ InternalState state_; |
+ float volume_; // Volume level from 0.0 to 1.0. |
+ |
+ size_t MicrosToBytes(uint32 micros, uint32 sample_rate, |
+ size_t bytes_per_sample); |
+ |
+ AudioSourceCallback* source_callback_; |
+ |
+ DISALLOW_COPY_AND_ASSIGN(PulseAudioOutputStream); |
+}; |
+ |
+#endif // MEDIA_AUDIO_LINUX_PULSE_OUTPUT_H_ |