# extmidi.cpp

    00001 /* $Id: extmidi.cpp 11777 2008-01-07 14:23:25Z rubidium $ */
    00002
    00003 #ifndef __MORPHOS__
    00004 #include "../stdafx.h"
    00005 #include "../openttd.h"
    00006 #include "../sound_func.h"
    00007 #include "../variables.h"
    00008 #include "../debug.h"
    00009 #include "extmidi.h"
    00010 #include <fcntl.h>
    00011 #include <sys/types.h>
    00012 #include <sys/wait.h>
    00013 #include <unistd.h>
    00014 #include <signal.h>
    00015 #include <sys/stat.h>
    00016 #include <errno.h>
    00017
    00018 static FMusicDriver_ExtMidi iFMusicDriver_ExtMidi;
    00019
    00020 const char* MusicDriver_ExtMidi::Start(const char* const * parm)
    00021 {
    00022   this->song[0] = '\0';
    00023   this->pid = -1;
    00024   return NULL;
    00025 }
    00026
    00027 void MusicDriver_ExtMidi::Stop()
    00028 {
    00029   this->song[0] = '\0';
    00030   this->DoStop();
    00031 }
    00032
    00033 void MusicDriver_ExtMidi::PlaySong(const char* filename)
    00034 {
    00035   ttd_strlcpy(this->song, filename, lengthof(this->song));
    00036   this->DoStop();
    00037 }
    00038
    00039 void MusicDriver_ExtMidi::StopSong()
    00040 {
    00041   this->song[0] = '\0';
    00042   this->DoStop();
    00043 }
    00044
    00045 bool MusicDriver_ExtMidi::IsSongPlaying()
    00046 {
    00047   if (this->pid != -1 && waitpid(this->pid, NULL, WNOHANG) == this->pid)
    00048     this->pid = -1;
    00049   if (this->pid == -1 && this->song[0] != '\0') this->DoPlay();
    00050   return this->pid != -1;
    00051 }
    00052
    00053 void MusicDriver_ExtMidi::SetVolume(byte vol)
    00054 {
    00055   DEBUG(driver, 1, "extmidi: set volume not implemented");
    00056 }
    00057
    00058 void MusicDriver_ExtMidi::DoPlay()
    00059 {
    00060   this->pid = fork();
    00061   switch (this->pid) {
    00062     case 0: {
    00063       int d;
    00064
    00065       close(0);
    00066       d = open("/dev/null", O_RDONLY);
    00067       if (d != -1 && dup2(d, 1) != -1 && dup2(d, 2) != -1) {
    00068         #if defined(MIDI_ARG)
    00069           execlp(msf.extmidi, "extmidi", MIDI_ARG, this->song, (char*)0);
    00070         #else
    00071           execlp(msf.extmidi, "extmidi", this->song, (char*)0);
    00072         #endif
    00073       }
    00074       _exit(1);
    00075     }
    00076
    00077     case -1:
    00078       DEBUG(driver, 0, "extmidi: couldn't fork: %s", strerror(errno));
    00079       /* FALLTHROUGH */
    00080
    00081     default:
    00082       this->song[0] = '\0';
    00083       break;
    00084   }
    00085 }
    00086
    00087 void MusicDriver_ExtMidi::DoStop()
    00088 {
    00089   if (this->pid != -1) kill(this->pid, SIGTERM);
    00090 }
    00091
    00092 #endif /* __MORPHOS__ */