123 lines
2.2 KiB
C++
123 lines
2.2 KiB
C++
/*
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** alstream.h
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**
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** This file is part of mkxp.
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**
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** Copyright (C) 2014 Jonas Kulla <Nyocurio@gmail.com>
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**
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** mkxp is free software: you can redistribute it and/or modify
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** it under the terms of the GNU General Public License as published by
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** the Free Software Foundation, either version 2 of the License, or
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** (at your option) any later version.
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**
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** mkxp is distributed in the hope that it will be useful,
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** but WITHOUT ANY WARRANTY; without even the implied warranty of
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** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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** GNU General Public License for more details.
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**
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** You should have received a copy of the GNU General Public License
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** along with mkxp. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef ALSTREAM_H
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#define ALSTREAM_H
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#include "al-util.h"
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#include "sdl-util.h"
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#include <string>
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#include <SDL_rwops.h>
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struct ALDataSource;
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#define STREAM_BUFS 3
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/* State-machine like audio playback stream.
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* This class is NOT thread safe */
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struct ALStream
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{
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enum State
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{
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Closed,
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Stopped,
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Playing,
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Paused
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};
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bool looped;
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State state;
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ALDataSource *source;
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SDL_Thread *thread;
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std::string threadName;
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SDL_mutex *pauseMut;
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bool preemptPause;
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/* When this flag isn't set and alSrc is
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* in 'STOPPED' state, stream isn't over
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* (it just hasn't started yet) */
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AtomicFlag streamInited;
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AtomicFlag sourceExhausted;
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AtomicFlag threadTermReq;
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AtomicFlag needsRewind;
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float startOffset;
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float pitch;
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AL::Source::ID alSrc;
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AL::Buffer::ID alBuf[STREAM_BUFS];
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uint64_t procFrames;
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AL::Buffer::ID lastBuf;
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SDL_RWops srcOps;
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struct
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{
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ALenum format;
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ALsizei freq;
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} stream;
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enum LoopMode
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{
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Looped,
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NotLooped
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};
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ALStream(LoopMode loopMode,
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const std::string &threadId);
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~ALStream();
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void close();
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void open(const std::string &filename);
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void stop();
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void play(float offset = 0);
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void pause();
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void setVolume(float value);
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void setPitch(float value);
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State queryState();
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float queryOffset();
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bool queryNativePitch();
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private:
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void closeSource();
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void openSource(const std::string &filename);
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void stopStream();
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void startStream(float offset);
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void pauseStream();
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void resumeStream();
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void checkStopped();
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/* thread func */
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void streamData();
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};
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#endif // ALSTREAM_H
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