Aegisub/aegisub/audio_player_pulse.h

// Copyright (c) 2007, Niels Martin Hansen
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
//   * Redistributions of source code must retain the above copyright notice,
//     this list of conditions and the following disclaimer.
//   * Redistributions in binary form must reproduce the above copyright notice,
//     this list of conditions and the following disclaimer in the documentation
//     and/or other materials provided with the distribution.
//   * Neither the name of the Aegisub Group nor the names of its contributors
//     may be used to endorse or promote products derived from this software
//     without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//
// -----------------------------------------------------------------------------
//
// AEGISUB
//
// Website: http://aegisub.cellosoft.com
// Contact: mailto:jiifurusu@gmail.com
//


#ifdef WITH_PULSEAUDIO


///////////
// Headers
#include <wx/wxprec.h>
#include <stdio.h>
#include "audio_player.h"
#include "audio_provider.h"
#include "utils.h"
#include "options.h"
#include <pulse/pulseaudio.h>


//////////////
// Prototypes
class PulseAudioPlayer;



//////////////////////
// Pulse Audio player
class PulseAudioPlayer : public AudioPlayer {
private:
	float volume;
	bool open;
	bool is_playing;

	// Audio data info
	volatile unsigned long start_frame;
	volatile unsigned long cur_frame;
	volatile unsigned long end_frame;
	unsigned long bpf; // bytes per frame

	// Used for synchronising with async events
	wxSemaphore context_notify;
	wxSemaphore context_success;
	volatile int context_success_val;
	wxSemaphore stream_notify;
	wxSemaphore stream_success;
	volatile int stream_success_val;

	// PulseAudio data
	pa_threaded_mainloop *mainloop; // pulseaudio mainloop handle
	pa_context *context; // connection context
	volatile pa_context_state_t cstate;
	pa_stream *stream;
	volatile pa_stream_state_t sstate;
	volatile pa_usec_t play_start_time; // timestamp when playback was started
	int paerror;

	// Called by PA to notify about contetxt operation completion
	static void pa_context_success(pa_context *c, int success, PulseAudioPlayer *thread);
	// Called by PA to notify about other context-related stuff
	static void pa_context_notify(pa_context *c, PulseAudioPlayer *thread);
	// Called by PA when a stream operation completes
	static void pa_stream_success(pa_stream *p, int success, PulseAudioPlayer *thread);
	// Called by PA to request more data written to stream
	static void pa_stream_write(pa_stream *p, size_t length, PulseAudioPlayer *thread);
	// Called by PA to notify about other stream-related stuff
	static void pa_stream_notify(pa_stream *p, PulseAudioPlayer *thread);

public:
	PulseAudioPlayer();
	~PulseAudioPlayer();

	void OpenStream();
	void CloseStream();

	void Play(int64_t start,int64_t count);
	void Stop(bool timerToo=true);
	bool IsPlaying();

	int64_t GetStartPosition();
	int64_t GetEndPosition();
	int64_t GetCurrentPosition();
	void SetEndPosition(int64_t pos);
	void SetCurrentPosition(int64_t pos);

	void SetVolume(double vol) { volume = vol; }
	double GetVolume() { return volume; }
};



///////////
// Factory
class PulseAudioPlayerFactory : public AudioPlayerFactory {
public:
	AudioPlayer *CreatePlayer() { return new PulseAudioPlayer(); }
	PulseAudioPlayerFactory() : AudioPlayerFactory(_T("pulse")) {}
};

#endif