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/* MikMod sound library
(c) 1998, 1999, 2000 Miodrag Vallat and others - see file AUTHORS for
complete list.
This library is free software; you can redistribute it and/or modify
it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of
the License, or (at your option) any later version.
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 Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA.
*/
/*==============================================================================
$Id$
Driver for output via a pipe to another command
==============================================================================*/
/*
Written by Simon Hosie <gumboot@clear.net.nz>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "mikmod_internals.h"
#ifdef DRV_PIPE
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#if (MIKMOD_UNIX)
#include <errno.h>
#include <sys/wait.h>
#endif
#ifdef SUNOS
extern int fclose(FILE *);
#endif
#define BUFFERSIZE 32768
static MWRITER *pipeout=NULL;
static FILE *pipefile=NULL;
#if (MIKMOD_UNIX)
static int pipefd[2]={-1,-1};
static pid_t pid;
#endif
static SBYTE *audiobuffer=NULL;
static CHAR *target=NULL;
static void pipe_CommandLine(const CHAR *cmdline)
{
CHAR *ptr=MD_GetAtom("pipe",cmdline,0);
if(ptr) {
MikMod_free(target);
target=ptr;
}
}
static BOOL pipe_IsThere(void)
{
return 1;
}
static int pipe_Init(void)
{
if(!target) {
_mm_errno=MMERR_OPENING_FILE;
return 1;
}
#if !(MIKMOD_UNIX)
#ifdef __EMX__
_fsetmode(stdout, "b");
#endif
#ifdef __WATCOMC__
pipefile = _popen(target, "wb");
#else
pipefile = popen(target, "wb");
#endif
if (!pipefile) {
_mm_errno=MMERR_OPENING_FILE;
return 1;
}
#else
/* poor man's popen() */
if (pipe(pipefd)) {
_mm_errno = MMERR_OPENING_FILE;
return 1;
}
switch (pid=fork()) {
case -1:
close(pipefd[0]);
close(pipefd[1]);
pipefd[0]=pipefd[1]=-1;
_mm_errno=MMERR_OPENING_FILE;
return 1;
case 0:
if (pipefd[0]) {
dup2(pipefd[0],0);
close(pipefd[0]);
}
close(pipefd[1]);
if (!MD_DropPrivileges())
execl("/bin/sh","sh","-c",target,NULL);
exit(127);
}
close(pipefd[0]);
if (!(pipefile=fdopen(pipefd[1],"wb"))) {
_mm_errno=MMERR_OPENING_FILE;
return 1;
}
#endif
if(!(pipeout=_mm_new_file_writer(pipefile)))
return 1;
if(!(audiobuffer=(SBYTE*)MikMod_malloc(BUFFERSIZE)))
return 1;
md_mode|=DMODE_SOFT_MUSIC|DMODE_SOFT_SNDFX;
return VC_Init();
}
static void pipe_Exit(void)
{
#if (MIKMOD_UNIX)
int pstat;
pid_t pid2;
#endif
VC_Exit();
MikMod_free(audiobuffer);
audiobuffer=NULL;
if(pipeout) {
_mm_delete_file_writer(pipeout);
pipeout=NULL;
}
if(pipefile) {
#if !(MIKMOD_UNIX)
#ifdef __WATCOMC__
_pclose(pipefile);
#else
pclose(pipefile);
#endif
#ifdef __EMX__
_fsetmode(stdout,"t");
#endif
#else /* unix: */
fclose(pipefile);
do {
pid2=waitpid(pid,&pstat,0);
} while (pid2==-1 && errno==EINTR);
#endif
pipefile=NULL;
}
}
static void pipe_Update(void)
{
_mm_write_UBYTES(audiobuffer,VC_WriteBytes(audiobuffer,BUFFERSIZE),pipeout);
}
MIKMODAPI MDRIVER drv_pipe={
NULL,
"Piped writer",
"Piped Output driver v0.2",
0,255,
"pipe",
"pipe:t::Pipe command\n",
pipe_CommandLine,
pipe_IsThere,
VC_SampleLoad,
VC_SampleUnload,
VC_SampleSpace,
VC_SampleLength,
pipe_Init,
pipe_Exit,
NULL,
VC_SetNumVoices,
VC_PlayStart,
VC_PlayStop,
pipe_Update,
NULL,
VC_VoiceSetVolume,
VC_VoiceGetVolume,
VC_VoiceSetFrequency,
VC_VoiceGetFrequency,
VC_VoiceSetPanning,
VC_VoiceGetPanning,
VC_VoicePlay,
VC_VoiceStop,
VC_VoiceStopped,
VC_VoiceGetPosition,
VC_VoiceRealVolume
};
#else
MISSING(drv_pipe);
#endif
/* ex:set ts=4: */
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