/* $Id$ */ /* * This file is part of OpenTTD. * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2. * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>. */ /** @file extmidi.cpp Playing music via an external player. */ #ifndef __MORPHOS__ #include "../stdafx.h" #include "../debug.h" #include "../string_func.h" #include "../sound/sound_driver.hpp" #include "../video/video_driver.hpp" #include "../gfx_func.h" #include "extmidi.h" #include <fcntl.h> #include <sys/types.h> #include <sys/wait.h> #include <unistd.h> #include <signal.h> #include <sys/stat.h> #include <errno.h> #ifndef EXTERNAL_PLAYER /** The default external midi player. */ #define EXTERNAL_PLAYER "timidity" #endif /** Factory for the midi player that uses external players. */ static FMusicDriver_ExtMidi iFMusicDriver_ExtMidi; const char *MusicDriver_ExtMidi::Start(const char * const * parm) { if (strcmp(_video_driver->GetName(), "allegro") == 0 || strcmp(_sound_driver->GetName(), "allegro") == 0) { return "the extmidi driver does not work when Allegro is loaded."; } const char *command = GetDriverParam(parm, "cmd"); if (StrEmpty(command)) command = EXTERNAL_PLAYER; this->command = strdup(command); this->song[0] = '\0'; this->pid = -1; return NULL; } void MusicDriver_ExtMidi::Stop() { free(command); this->song[0] = '\0'; this->DoStop(); } void MusicDriver_ExtMidi::PlaySong(const char *filename) { strecpy(this->song, filename, lastof(this->song)); this->DoStop(); } void MusicDriver_ExtMidi::StopSong() { this->song[0] = '\0'; this->DoStop(); } bool MusicDriver_ExtMidi::IsSongPlaying() { if (this->pid != -1 && waitpid(this->pid, NULL, WNOHANG) == this->pid) { this->pid = -1; } if (this->pid == -1 && this->song[0] != '\0') this->DoPlay(); return this->pid != -1; } void MusicDriver_ExtMidi::SetVolume(byte vol) { DEBUG(driver, 1, "extmidi: set volume not implemented"); } void MusicDriver_ExtMidi::DoPlay() { this->pid = fork(); switch (this->pid) { case 0: { close(0); int d = open("/dev/null", O_RDONLY); if (d != -1 && dup2(d, 1) != -1 && dup2(d, 2) != -1) { #if defined(MIDI_ARG) execlp(this->command, "extmidi", MIDI_ARG, this->song, (char*)0); #else execlp(this->command, "extmidi", this->song, (char*)0); #endif } _exit(1); } case -1: DEBUG(driver, 0, "extmidi: couldn't fork: %s", strerror(errno)); /* FALL THROUGH */ default: this->song[0] = '\0'; break; } } void MusicDriver_ExtMidi::DoStop() { if (this->pid <= 0) return; /* First try to gracefully stop for about five seconds; * 5 seconds = 5000 milliseconds, 10 ms per cycle => 500 cycles. */ for (int i = 0; i < 500; i++) { kill(this->pid, SIGTERM); if (waitpid(this->pid, NULL, WNOHANG) == this->pid) { /* It has shut down, so we are done */ this->pid = -1; return; } /* Wait 10 milliseconds. */ CSleep(10); } DEBUG(driver, 0, "extmidi: gracefully stopping failed, trying the hard way"); /* Gracefully stopping failed. Do it the hard way * and wait till the process finally died. */ kill(this->pid, SIGKILL); waitpid(this->pid, NULL, 0); this->pid = -1; } #endif /* __MORPHOS__ */