// Copyright (c) 2005-2007, Rodrigo Braz Monteiro
// 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
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//
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// Aegisub Project http://www.aegisub.org/
//
// $Id$

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

#ifdef WITH_PORTAUDIO

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


extern "C" {
#include <portaudio.h>
}

/// @class PortAudioPlayer
/// @brief PortAudio Player
///
class PortAudioPlayer : public AudioPlayer {
private:

	/// PortAudio initilisation reference counter.
	static int pa_refcount;

	/// Current volume level.
	float volume;

	/// @brief Stream playback position info.
	struct PositionInfo {
		volatile int64_t current;	/// Current position.
		volatile int64_t start;		/// Start position.
		volatile int64_t end;		/// End position.
		PaTime pa_start;			/// PortAudio internal start position.
	};
    PositionInfo pos;

	/// PortAudio stream.
	void *stream;

	static int paCallback(
		const void *inputBuffer,
		void *outputBuffer,
		unsigned long framesPerBuffer,
		const PaStreamCallbackTimeInfo*
		timeInfo,
		PaStreamCallbackFlags
		statusFlags,
		void *userData);

	static void paStreamFinishedCallback(void *userData);

public:
	PortAudioPlayer();
	~PortAudioPlayer();

	void OpenStream();
	void CloseStream();

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

	/// @brief Whether audio is currently being played.
	/// @return Status
	bool IsPlaying();

	/// @brief Position audio will be played from.
	/// @return Start position.
	int64_t GetStartPosition() { return pos.start; }

	/// @brief End position playback will stop at.
	/// @return End position.
	int64_t GetEndPosition() { return pos.end; }
	int64_t GetCurrentPosition();

	/// @brief Set end position of playback
	/// @param pos End position
	void SetEndPosition(int64_t position) { pos.end = position; }

	/// @brief Set current position of playback.
	/// @param pos Current position
	void SetCurrentPosition(int64_t position) { pos.current = position; }


	/// @brief Set volume level
	/// @param vol Volume
	void SetVolume(double vol) { volume = vol; }

	/// @brief Get current volume level
	/// @return Volume level
	double GetVolume() { return volume; }

	wxArrayString GetOutputDevices(wxString favorite);
};
#endif //ifdef WITH_PORTAUDIO