Aegisub/aegisub/src/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.
//
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// Aegisub Project http://www.aegisub.org/
//
// $Id$

/// @file audio_player_pulse.h
/// @see audio_player_pulse.cpp
/// @ingroup audio_output
///


#ifdef WITH_PULSEAUDIO


///////////
// Headers
#ifndef AGI_PRE
#include <stdio.h>
#endif

#include <pulse/pulseaudio.h>

#include "include/aegisub/audio_player.h"
#include "include/aegisub/audio_provider.h"
#include "options.h"
#include "utils.h"


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




/// DOCME
/// @class PulseAudioPlayer
/// @brief DOCME
///
/// DOCME
class PulseAudioPlayer : public AudioPlayer {
private:

	/// DOCME
	float volume;

	/// DOCME
	bool open;

	/// DOCME
	bool is_playing;


	/// DOCME
	volatile unsigned long start_frame;

	/// DOCME
	volatile unsigned long cur_frame;

	/// DOCME
	volatile unsigned long end_frame;

	/// DOCME
	unsigned long bpf; // bytes per frame


	/// DOCME
	wxSemaphore context_notify;

	/// DOCME
	wxSemaphore context_success;

	/// DOCME
	volatile int context_success_val;

	/// DOCME
	wxSemaphore stream_notify;

	/// DOCME
	wxSemaphore stream_success;

	/// DOCME
	volatile int stream_success_val;


	/// DOCME
	pa_threaded_mainloop *mainloop; // pulseaudio mainloop handle

	/// DOCME
	pa_context *context; // connection context

	/// DOCME
	volatile pa_context_state_t cstate;

	/// DOCME
	pa_stream *stream;

	/// DOCME
	volatile pa_stream_state_t sstate;

	/// DOCME
	volatile pa_usec_t play_start_time; // timestamp when playback was started

	/// DOCME
	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);


	/// @brief DOCME
	/// @param vol 
	/// @return 
	///
	void SetVolume(double vol) { volume = vol; }

	/// @brief DOCME
	/// @return 
	///
	double GetVolume() { return volume; }
};




/// DOCME
/// @class PulseAudioPlayerFactory
/// @brief DOCME
///
/// DOCME
class PulseAudioPlayerFactory : public AudioPlayerFactory {
public:

	/// @brief DOCME
	///
	AudioPlayer *CreatePlayer() { return new PulseAudioPlayer(); }
};

#endif