Aegisub/src/audio_player_oss.h

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// Copyright (c) 2009, Grigori Goronzy
// 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/
/// @file audio_player_oss.h
/// @see audio_player_oss.cpp
/// @ingroup audio_output
///
#ifdef WITH_OSS
#include <sys/ioctl.h>
#include <wx/thread.h>
#include <fcntl.h>
#ifdef HAVE_SOUNDCARD_H
# include <soundcard.h>
#else
# ifdef HAVE_SYS_SOUNDCARD_H
# include <sys/soundcard.h>
# endif
#endif
#include "include/aegisub/audio_player.h"
class AudioProvider;
class OSSPlayer;
/// Worker thread to asynchronously write audio data to the output device
class OSSPlayerThread : public wxThread {
/// Parent player
OSSPlayer *parent;
public:
/// Constructor
/// @param parent Player to get audio data and playback state from
OSSPlayerThread(OSSPlayer *parent);
/// Main thread entry point
wxThread::ExitCode Entry();
};
class OSSPlayer : public AudioPlayer {
friend class OSSPlayerThread;
/// sample rate of audio
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unsigned int rate = 0;
/// Worker thread that does the actual writing
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OSSPlayerThread *thread = nullptr;
/// Is the player currently playing?
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volatile bool playing = false;
/// Current volume level
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volatile float volume = 1.f;
/// first frame of playback
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volatile unsigned long start_frame = 0;
/// last written frame + 1
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volatile unsigned long cur_frame = 0;
/// last frame to play
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volatile unsigned long end_frame = 0;
/// bytes per frame
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unsigned long bpf = 0;
/// OSS audio device handle
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volatile int dspdev = 0;
void OpenStream();
public:
OSSPlayer(AudioProvider *provider);
~OSSPlayer();
void Play(int64_t start, int64_t count);
void Stop();
bool IsPlaying() { return playing; }
int64_t GetEndPosition() { return end_frame; }
void SetEndPosition(int64_t pos);
int64_t GetCurrentPosition();
void SetVolume(double vol) { volume = vol; }
};
#endif