make pulseaudio available for all posix platforms because it's not linux only

media/audio/pulse/pulse_output.h

 // 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.
 //
 // Creates an audio output stream based on the PulseAudio asynchronous API.
 //
 // If the stream is successfully opened, Close() must be called before the
 // stream is deleted as Close() is responsible for ensuring resource cleanup
 // occurs.
 //
 // This object is designed so that all AudioOutputStream methods will be called
 // on the same thread that created the object.
 //
 // WARNING: This object blocks on internal PulseAudio calls in Open() while
 // waiting for PulseAudio's context structure to be ready.  It also blocks in
 // inside PulseAudio in Start() and repeated during playback, waiting for
 // PulseAudio write callbacks to occur.
 
 #ifndef MEDIA_AUDIO_LINUX_PULSE_OUTPUT_H_

[scherkus (not reviewing), 2011/11/16 00:57:56]

update header guard

[Robert Nagy, 2011/11/16 11:59:59]

Done.

 #define MEDIA_AUDIO_LINUX_PULSE_OUTPUT_H_
 
 #include <pulse/pulseaudio.h>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/task.h"
 #include "media/audio/audio_io.h"
 #include "media/base/channel_layout.h"
 
 namespace media {
 class SeekableBuffer;
 }
 
+#if defined(OS_LINUX)
 class AudioManagerLinux;
+typedef AudioManagerLinux AudioManagerPulse;
+#elif defined(OS_OPENBSD)
+class AudioManagerOpenBSD;
+typedef AudioManagerOpenBSD AudioManagerPulse;
+#else
+#error Unsupported platform
+#endif
+
 struct AudioParameters;
 class MessageLoop;
 
 class PulseAudioOutputStream : public AudioOutputStream {
  public:
   PulseAudioOutputStream(const AudioParameters& params,
-                         AudioManagerLinux* manager,
+                         AudioManagerPulse* manager,
                          MessageLoop* message_loop);
 
   virtual ~PulseAudioOutputStream();
 
   // Implementation of AudioOutputStream.
   virtual bool Open();
   virtual void Close();
   virtual void Start(AudioSourceCallback* callback);
   virtual void Stop();
   virtual void SetVolume(double volume);
@@ skipping 27 matching lines @@
 
   // Configuration constants from the constructor.  Referencable by all threads
   // since they are constants.
   const ChannelLayout channel_layout_;
   const uint32 channel_count_;
   const pa_sample_format_t sample_format_;
   const uint32 sample_rate_;
   const uint32 bytes_per_frame_;
 
   // Audio manager that created us.  Used to report that we've closed.
-  AudioManagerLinux* manager_;
+  AudioManagerPulse* manager_;
 
   // PulseAudio API structs.
   pa_context* pa_context_;
   pa_mainloop* pa_mainloop_;
 
   // Handle to the actual PulseAudio playback stream.
   pa_stream* playback_handle_;
 
   // Device configuration data.  Populated after Open() completes.
   uint32 packet_size_;
@@ skipping 21 matching lines @@
   // Allows us to run tasks on the PulseAudioOutputStream instance which are
   // bound by its lifetime.
   base::WeakPtrFactory<PulseAudioOutputStream> weak_factory_;
 
   // Callback to audio data source.
   AudioSourceCallback* source_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(PulseAudioOutputStream);
 };
 
 #endif  // MEDIA_AUDIO_LINUX_PULSE_OUTPUT_H_

[scherkus (not reviewing), 2011/11/16 00:57:56]

down here too

[Robert Nagy, 2011/11/16 11:59:59]

Done.