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raze/polymer/eduke32/source/sdlmusic.c
helixhorned cc7110c18f - Add new trueror1.map that showcases the functionality and limitations of 
the additional rendering pass
- Remove r_preview_mouseaim cvar from the game, since it's only for Mapster
- sdlmusic.c: (Failed) attempt to fix a call of waitpid() with a non-existent
  process ID in the external MIDI playing code. I think there's a race there...

git-svn-id: https://svn.eduke32.com/eduke32@2025 1a8010ca-5511-0410-912e-c29ae57300e0
2011-09-15 17:04:37 +00:00

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//-------------------------------------------------------------------------
/*
Copyright (C) 2010 EDuke32 developers and contributors
This file is part of EDuke32.
EDuke32 is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License version 2
as published by the Free Software Foundation.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
//-------------------------------------------------------------------------
/*
* A reimplementation of Jim Dose's FX_MAN routines, using SDL_mixer 1.2.
* Whee. FX_MAN is also known as the "Apogee Sound System", or "ASS" for
* short. How strangely appropriate that seems.
*/
#include <stdio.h>
#include <errno.h>
#if defined __APPLE__ && defined __BIG_ENDIAN__
// is* hacks for ppc...
# include "compat.h"
#endif
#include "duke3d.h"
#include "cache1d.h"
#define _NEED_SDLMIXER 1
#include "sdl_inc.h"
#include "music.h"
#if !defined _WIN32
# define FORK_EXEC_MIDI 1
#endif
#if defined FORK_EXEC_MIDI // fork/exec based external midi player
#include <stdlib.h>
#include <signal.h>
#include <unistd.h>
#include <sys/mman.h>
#include <sys/wait.h>
static char **external_midi_argv;
static pid_t external_midi_pid=-1;
static int8_t external_midi_restart=0;
#endif
static char *external_midi_tempfn = "/tmp/eduke32-music.mid";
static int32_t external_midi = 0;
int32_t MUSIC_ErrorCode = MUSIC_Ok;
static char warningMessage[80];
static char errorMessage[80];
static int32_t music_initialized = 0;
static int32_t music_context = 0;
static int32_t music_loopflag = MUSIC_PlayOnce;
static Mix_Music *music_musicchunk = NULL;
static void setErrorMessage(const char *msg)
{
Bstrncpy(errorMessage, msg, sizeof(errorMessage));
// strncpy() doesn't add the null char if there isn't room...
errorMessage[sizeof(errorMessage) - 1] = '\0';
} // setErrorMessage
// The music functions...
char *MUSIC_ErrorString(int32_t ErrorNumber)
{
switch (ErrorNumber)
{
case MUSIC_Warning:
return(warningMessage);
case MUSIC_Error:
return(errorMessage);
case MUSIC_Ok:
return("OK; no error.");
case MUSIC_ASSVersion:
return("Incorrect sound library version.");
case MUSIC_SoundCardError:
return("General sound card error.");
case MUSIC_InvalidCard:
return("Invalid sound card.");
case MUSIC_MidiError:
return("MIDI error.");
case MUSIC_MPU401Error:
return("MPU401 error.");
case MUSIC_TaskManError:
return("Task Manager error.");
//case MUSIC_FMNotDetected:
// return("FM not detected error.");
case MUSIC_DPMI_Error:
return("DPMI error.");
default:
return("Unknown error.");
} // switch
return(NULL);
} // MUSIC_ErrorString
int32_t MUSIC_Init(int32_t SoundCard, int32_t Address)
{
// Use an external MIDI player if the user has specified to do so
char *command = getenv("EDUKE32_MUSIC_CMD");
const SDL_version *linked = Mix_Linked_Version();
if (music_initialized)
{
setErrorMessage("Music system is already initialized.");
return(MUSIC_Error);
} // if
UNREFERENCED_PARAMETER(Address);
if (SDL_VERSIONNUM(linked->major,linked->minor,linked->patch) < MIX_REQUIREDVERSION)
{
// reject running with SDL_Mixer versions older than what is stated in sdl_inc.h
initprintf("You need at least v%d.%d.%d of SDL_mixer for music\n",SDL_MIXER_MIN_X,SDL_MIXER_MIN_Y,SDL_MIXER_MIN_Z);
return(MUSIC_Error);
}
external_midi = (command != NULL && command[0] != 0);
if (external_midi)
{
initprintf("Setting music command to \"%s\".\n", command);
#if !defined FORK_EXEC_MIDI
if (Mix_SetMusicCMD(command)==-1)
{
perror("Mix_SetMusicCMD");
goto fallback;
}
#else
int32_t ws=1, numargs=0, pagesize=sysconf(_SC_PAGE_SIZE);
char *c, *cmd;
size_t sz;
if (pagesize==-1)
goto fallback;
for (c=command; *c; c++)
{
if (isspace(*c))
ws = 1;
else if (ws)
{
ws = 0;
numargs++;
}
}
if (numargs==0)
goto fallback;
sz = (numargs+2)*sizeof(char *) + (c-command+1);
sz = ((sz+pagesize-1)/pagesize)*pagesize;
# ifdef NEDMALLOC
external_midi_argv = Bcalloc(1,sz+pagesize);
if (!external_midi_argv)
goto fallback;
external_midi_argv = (char **)((intptr_t)external_midi_argv + (pagesize-(((intptr_t)external_midi_argv)&(pagesize-1))));
# else
if (posix_memalign((void **)&external_midi_argv, pagesize, sz))
goto fallback;
# endif
cmd = (char *)external_midi_argv + (numargs+2)*sizeof(char *);
Bmemcpy(cmd, command, c-command+1);
ws = 1;
numargs = 0;
for (c=cmd; *c; c++)
{
if (isspace(*c))
{
ws = 1;
*c = 0;
}
else if (ws)
{
ws = 0;
external_midi_argv[numargs++] = c;
}
}
external_midi_argv[numargs] = external_midi_tempfn;
external_midi_argv[numargs+1] = NULL;
if (mprotect(external_midi_argv, sz, PROT_READ)==-1) // make argv and command string read-only
{
perror("MUSIC_Init: mprotect");
goto fallback;
}
/*
{
int i;
initprintf("----Music argv:\n");
for (i=0; i<numargs+1; i++)
initprintf(" %s\n", external_midi_argv[i]);
initprintf("----\n");
}
*/
#endif
SoundCard = 1;
music_initialized = 1;
return(MUSIC_Ok);
fallback:
initprintf("Error setting music command, falling back to timidity.\n");
}
{
static const char *s[] = { "/etc/timidity.cfg", "/etc/timidity/timidity.cfg", "/etc/timidity/freepats.cfg" };
FILE *fp;
int32_t i;
for (i = (sizeof(s)/sizeof(s[0]))-1; i>=0; i--)
{
fp = Bfopen(s[i], "r");
if (fp == NULL)
{
if (i == 0)
{
initprintf("Error: couldn't open any of the following files:\n");
for (i = (sizeof(s)/sizeof(s[0]))-1; i>=0; i--)
initprintf("%s\n",s[i]);
return(MUSIC_Error);
}
continue;
}
else break;
}
Bfclose(fp);
}
SoundCard = 1;
music_initialized = 1;
return(MUSIC_Ok);
} // MUSIC_Init
int32_t MUSIC_Shutdown(void)
{
// TODO - make sure this is being called from the menu -- SA
#if !defined FORK_EXEC_MIDI
if (external_midi)
Mix_SetMusicCMD(NULL);
#endif
MUSIC_StopSong();
music_context = 0;
music_initialized = 0;
music_loopflag = MUSIC_PlayOnce;
return(MUSIC_Ok);
} // MUSIC_Shutdown
void MUSIC_SetMaxFMMidiChannel(int32_t channel)
{
UNREFERENCED_PARAMETER(channel);
} // MUSIC_SetMaxFMMidiChannel
void MUSIC_SetVolume(int32_t volume)
{
volume = max(0, volume);
volume = min(volume, 255);
Mix_VolumeMusic(volume >> 1); // convert 0-255 to 0-128.
} // MUSIC_SetVolume
void MUSIC_SetMidiChannelVolume(int32_t channel, int32_t volume)
{
UNREFERENCED_PARAMETER(channel);
UNREFERENCED_PARAMETER(volume);
} // MUSIC_SetMidiChannelVolume
void MUSIC_ResetMidiChannelVolumes(void)
{
} // MUSIC_ResetMidiChannelVolumes
int32_t MUSIC_GetVolume(void)
{
return(Mix_VolumeMusic(-1) << 1); // convert 0-128 to 0-255.
} // MUSIC_GetVolume
void MUSIC_SetLoopFlag(int32_t loopflag)
{
music_loopflag = loopflag;
} // MUSIC_SetLoopFlag
int32_t MUSIC_SongPlaying(void)
{
return((Mix_PlayingMusic()) ? TRUE : FALSE);
} // MUSIC_SongPlaying
void MUSIC_Continue(void)
{
if (Mix_PausedMusic())
Mix_ResumeMusic();
} // MUSIC_Continue
void MUSIC_Pause(void)
{
Mix_PauseMusic();
} // MUSIC_Pause
int32_t MUSIC_StopSong(void)
{
#if defined FORK_EXEC_MIDI
if (external_midi)
{
if (external_midi_pid > 0)
{
int32_t ret;
struct timespec ts;
external_midi_restart = 0; // make SIGCHLD handler a no-op
ts.tv_sec = 0;
ts.tv_nsec = 5000000; // sleep 5ms at most
kill(external_midi_pid, SIGTERM);
nanosleep(&ts, NULL);
ret = waitpid(external_midi_pid, NULL, WNOHANG|WUNTRACED);
// printf("(%d)", ret);
if (ret != external_midi_pid)
{
if (ret==-1)
perror("waitpid");
else
{
// we tried to be nice, but no...
kill(external_midi_pid, SIGKILL);
initprintf("%s: wait for SIGTERM timed out.\n", __func__);
if (waitpid(external_midi_pid, NULL, WUNTRACED)==-1)
perror("waitpid (2)");
}
}
external_midi_pid = -1;
}
return(MUSIC_Ok);
}
#endif
//if (!fx_initialized)
if (!Mix_QuerySpec(NULL, NULL, NULL))
{
setErrorMessage("Need FX system initialized, too. Sorry.");
return(MUSIC_Error);
} // if
if ((Mix_PlayingMusic()) || (Mix_PausedMusic()))
Mix_HaltMusic();
if (music_musicchunk)
Mix_FreeMusic(music_musicchunk);
music_musicchunk = NULL;
return(MUSIC_Ok);
} // MUSIC_StopSong
#if defined FORK_EXEC_MIDI
static void playmusic()
{
pid_t pid = vfork();
if (pid==-1) // error
{
initprintf("%s: vfork: %s\n", __func__, strerror(errno));
}
else if (pid==0) // child
{
// exec with PATH lookup
if (execvp(external_midi_argv[0], external_midi_argv) < 0)
{
perror("execv");
_exit(1);
}
}
else // parent
{
external_midi_pid = pid;
}
}
static void sigchld_handler(int signo)
{
if (signo==SIGCHLD && external_midi_restart)
{
int status;
if (external_midi_pid > 0)
{
if (waitpid(external_midi_pid, &status, WUNTRACED)==-1)
perror("waitpid (3)");
if (WIFEXITED(status) && WEXITSTATUS(status)==0)
{
// loop ...
playmusic();
}
}
}
}
#endif
// Duke3D-specific. --ryan.
// void MUSIC_PlayMusic(char *_filename)
int32_t MUSIC_PlaySong(char *song, int32_t loopflag)
{
MUSIC_StopSong();
if (external_midi)
{
FILE *fp;
#if defined FORK_EXEC_MIDI
static int32_t sigchld_handler_set = 0;
if (!sigchld_handler_set)
{
struct sigaction sa = { .sa_handler=sigchld_handler, .sa_flags=0 };
sigemptyset(&sa.sa_mask);
if (sigaction(SIGCHLD, &sa, NULL)==-1)
initprintf("%s: sigaction: %s\n", __func__, strerror(errno));
sigchld_handler_set = 1;
}
#endif
fp = Bfopen(external_midi_tempfn, "wb");
if (fp)
{
fwrite(song, 1, g_musicSize, fp);
Bfclose(fp);
#if defined FORK_EXEC_MIDI
external_midi_restart = loopflag;
playmusic();
#else
music_musicchunk = Mix_LoadMUS(external_midi_tempfn);
if (!music_musicchunk)
initprintf("Mix_LoadMUS: %s\n", Mix_GetError());
#endif
}
else initprintf("%s: fopen: %s\n", __func__, strerror(errno));
}
else
music_musicchunk = Mix_LoadMUS_RW(SDL_RWFromMem((char *) song, g_musicSize));
if (music_musicchunk != NULL)
if (Mix_PlayMusic(music_musicchunk, (loopflag == MUSIC_LoopSong)?-1:0) == -1)
initprintf("Mix_PlayMusic: %s\n", Mix_GetError());
return MUSIC_Ok;
}
void MUSIC_SetContext(int32_t context)
{
music_context = context;
} // MUSIC_SetContext
int32_t MUSIC_GetContext(void)
{
return(music_context);
} // MUSIC_GetContext
void MUSIC_SetSongTick(uint32_t PositionInTicks)
{
UNREFERENCED_PARAMETER(PositionInTicks);
} // MUSIC_SetSongTick
void MUSIC_SetSongTime(uint32_t milliseconds)
{
UNREFERENCED_PARAMETER(milliseconds);
}// MUSIC_SetSongTime
void MUSIC_SetSongPosition(int32_t measure, int32_t beat, int32_t tick)
{
UNREFERENCED_PARAMETER(measure);
UNREFERENCED_PARAMETER(beat);
UNREFERENCED_PARAMETER(tick);
} // MUSIC_SetSongPosition
void MUSIC_GetSongPosition(songposition *pos)
{
UNREFERENCED_PARAMETER(pos);
} // MUSIC_GetSongPosition
void MUSIC_GetSongLength(songposition *pos)
{
UNREFERENCED_PARAMETER(pos);
} // MUSIC_GetSongLength
int32_t MUSIC_FadeVolume(int32_t tovolume, int32_t milliseconds)
{
UNREFERENCED_PARAMETER(tovolume);
Mix_FadeOutMusic(milliseconds);
return(MUSIC_Ok);
} // MUSIC_FadeVolume
int32_t MUSIC_FadeActive(void)
{
return((Mix_FadingMusic() == MIX_FADING_OUT) ? TRUE : FALSE);
} // MUSIC_FadeActive
void MUSIC_StopFade(void)
{
} // MUSIC_StopFade
void MUSIC_RerouteMidiChannel(int32_t channel, int32_t (*function)(int32_t, int32_t, int32_t))
{
UNREFERENCED_PARAMETER(channel);
UNREFERENCED_PARAMETER(function);
} // MUSIC_RerouteMidiChannel
void MUSIC_RegisterTimbreBank(char *timbres)
{
UNREFERENCED_PARAMETER(timbres);
} // MUSIC_RegisterTimbreBank
void MUSIC_Update(void)
{}
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