Aegisub/aegisub/src/audio_player_openal.h

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// 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
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//
// Aegisub Project http://www.aegisub.org/
//
// $Id$
/// @file audio_player_openal.h
/// @see audio_player_openal.cpp
/// @ingroup audio_output
///
#ifdef WITH_OPENAL
///////////
// Headers
#include "audio_player_manager.h"
#include "frame_main.h"
#include "include/aegisub/audio_player.h"
#include "include/aegisub/audio_provider.h"
#include "options.h"
#include "utils.h"
#ifdef __WINDOWS__
#include <al.h>
#include <alc.h>
#elif defined(__APPLE__)
#include <OpenAL/AL.h>
#include <OpenAL/ALC.h>
#else
#include <AL/al.h>
#include <AL/alc.h>
#endif
/// DOCME
/// @class OpenALPlayer
/// @brief DOCME
///
/// DOCME
class OpenALPlayer : public AudioPlayer, wxTimer {
private:
/// DOCME
bool open;
/// DOCME
volatile bool playing;
/// DOCME
volatile float volume;
/// DOCME
static const ALsizei num_buffers = 8;
/// DOCME
ALsizei buffer_length;
/// DOCME
ALsizei samplerate;
/// DOCME
volatile unsigned long start_frame; // first frame of playback
/// DOCME
volatile unsigned long cur_frame; // last written frame + 1
/// DOCME
volatile unsigned long end_frame; // last frame to play
/// DOCME
unsigned long bpf; // bytes per frame
/// DOCME
AudioProvider *provider;
/// DOCME
ALCdevice *device; // device handle
/// DOCME
ALCcontext *context; // sound context
/// DOCME
ALuint buffers[num_buffers]; // sound buffers
/// DOCME
ALuint source; // playback source
/// DOCME
ALsizei buf_first_free; // index into buffers, first free (unqueued) buffer
/// DOCME
ALsizei buf_first_queued; // index into buffers, first queued (non-free) buffer
/// DOCME
ALsizei buffers_free; // number of free buffers
/// DOCME
ALsizei buffers_played;
/// DOCME
wxStopWatch playback_segment_timer;
void FillBuffers(ALsizei count);
protected:
void Notify(); // from wxTimer
public:
OpenALPlayer();
~OpenALPlayer();
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 OpenALPlayerFactory
/// @brief DOCME
///
/// DOCME
class OpenALPlayerFactory : public AudioPlayerFactory {
public:
/// @brief DOCME
///
AudioPlayer *CreatePlayer() { return new OpenALPlayer(); }
};
#endif