extmidi.cpp
Go to the documentation of this file.00001
00002
00005 #ifndef __MORPHOS__
00006 #include "../stdafx.h"
00007 #include "../debug.h"
00008 #include "extmidi.h"
00009 #include <fcntl.h>
00010 #include <sys/types.h>
00011 #include <sys/wait.h>
00012 #include <unistd.h>
00013 #include <signal.h>
00014 #include <sys/stat.h>
00015 #include <errno.h>
00016
00017 #ifndef EXTERNAL_PLAYER
00018 #define EXTERNAL_PLAYER "timidity"
00019 #endif
00020
00021 static FMusicDriver_ExtMidi iFMusicDriver_ExtMidi;
00022
00023 const char *MusicDriver_ExtMidi::Start(const char * const * parm)
00024 {
00025 const char *command = GetDriverParam(parm, "cmd");
00026 if (StrEmpty(command)) command = EXTERNAL_PLAYER;
00027
00028 this->command = strdup(command);
00029 this->song[0] = '\0';
00030 this->pid = -1;
00031 return NULL;
00032 }
00033
00034 void MusicDriver_ExtMidi::Stop()
00035 {
00036 free(command);
00037 this->song[0] = '\0';
00038 this->DoStop();
00039 }
00040
00041 void MusicDriver_ExtMidi::PlaySong(const char *filename)
00042 {
00043 strecpy(this->song, filename, lastof(this->song));
00044 this->DoStop();
00045 }
00046
00047 void MusicDriver_ExtMidi::StopSong()
00048 {
00049 this->song[0] = '\0';
00050 this->DoStop();
00051 }
00052
00053 bool MusicDriver_ExtMidi::IsSongPlaying()
00054 {
00055 if (this->pid != -1 && waitpid(this->pid, NULL, WNOHANG) == this->pid)
00056 this->pid = -1;
00057 if (this->pid == -1 && this->song[0] != '\0') this->DoPlay();
00058 return this->pid != -1;
00059 }
00060
00061 void MusicDriver_ExtMidi::SetVolume(byte vol)
00062 {
00063 DEBUG(driver, 1, "extmidi: set volume not implemented");
00064 }
00065
00066 void MusicDriver_ExtMidi::DoPlay()
00067 {
00068 this->pid = fork();
00069 switch (this->pid) {
00070 case 0: {
00071 int d;
00072
00073 close(0);
00074 d = open("/dev/null", O_RDONLY);
00075 if (d != -1 && dup2(d, 1) != -1 && dup2(d, 2) != -1) {
00076 #if defined(MIDI_ARG)
00077 execlp(this->command, "extmidi", MIDI_ARG, this->song, (char*)0);
00078 #else
00079 execlp(this->command, "extmidi", this->song, (char*)0);
00080 #endif
00081 }
00082 _exit(1);
00083 }
00084
00085 case -1:
00086 DEBUG(driver, 0, "extmidi: couldn't fork: %s", strerror(errno));
00087
00088
00089 default:
00090 this->song[0] = '\0';
00091 break;
00092 }
00093 }
00094
00095 void MusicDriver_ExtMidi::DoStop()
00096 {
00097 if (this->pid != -1) kill(this->pid, SIGTERM);
00098 }
00099
00100 #endif