cpp/openttd-patchpack/source Files · src/music/extmidi.h

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yexo

(svn r16502) -Fix [FS#2935]: when an AI was suspended while in a function called (indirectly) via call/acall/pcall OpenTTD crashed. Fix this by disallowing AIs to be suspended while called via call/acall/pcall.
IMPORTANT FOR AI WRITERS: AIs can no longer call any DoCommand functions (change anything, build vehicles, etc.) in a function called (indirectly) via call/acall/pcall. Where possible, please rewrite your code so it doesn't use call/acall/pcall

/* $Id$ */

/** @file extmidi.h Base support for playing music via an external application. */

#ifndef MUSIC_EXTERNAL_H
#define MUSIC_EXTERNAL_H

#include "music_driver.hpp"

class MusicDriver_ExtMidi: public MusicDriver {
private:
	char *command;
	char song[MAX_PATH];
	pid_t pid;

	void DoPlay();
	void DoStop();

public:
	/* virtual */ const char *Start(const char * const *param);

	/* virtual */ void Stop();

	/* virtual */ void PlaySong(const char *filename);

	/* virtual */ void StopSong();

	/* virtual */ bool IsSongPlaying();

	/* virtual */ void SetVolume(byte vol);
};

class FMusicDriver_ExtMidi: public MusicDriverFactory<FMusicDriver_ExtMidi> {
public:
	static const int priority = 1;
	/* virtual */ const char *GetName() { return "extmidi"; }
	/* virtual */ const char *GetDescription() { return "External MIDI Driver"; }
	/* virtual */ Driver *CreateInstance() { return new MusicDriver_ExtMidi(); }
};

#endif /* MUSIC_EXTERNAL_H */