extmidi.c
author pasky
Fri, 26 Nov 2004 21:14:42 +0000
changeset 513 a6eaa0d97d8d
parent 342 c16e965ab592
child 1301 bf64ba5b6774
permissions -rw-r--r--
(svn r828) Everyone welcome table/sprites.h in trunk - so far not in use besides enum AnimCursors migrated from viewport.h and tiny fragment of enum Sprites migrated from ttd.h (we should slowly convert trunk to use the symbolic names instead of sprite numbers too to reduce the delta to map). Ported from the map branch, where the work was done by Darkvater, Celestar and Tron.
#ifndef __BEOS__
#ifndef __MORPHOS__
#include "stdafx.h"

#include "ttd.h"
#include "hal.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
#define EXTERNAL_PLAYER "timidity"
#endif

static pid_t _pid;

static void extmidi_kill(void)
{
	if (_pid > 0) {
		kill(_pid, SIGKILL);
		while (waitpid(_pid, NULL, WNOHANG) != _pid);
	}
	_pid = 0;
}

static char *extmidi_start(char **parm)
{
	_pid = 0;
	return NULL;
}

static void extmidi_stop(void)
{
	extmidi_kill();
}

static void extmidi_play_song(const char *filename)
{
	extmidi_kill();

	_pid = fork();
	if (_pid < 0) {
		fprintf(stderr, "extmidi: couldn't fork: %s\n", strerror(errno));
		_pid = 0;
		return;
	}

	if (_pid == 0) {
		#if defined(MIDI_ARG)
			execlp(EXTERNAL_PLAYER, "extmidi", MIDI_ARG, filename, NULL);
		#else
			execlp(EXTERNAL_PLAYER, "extmidi", filename, NULL);
		#endif
		fprintf(stderr, "extmidi: couldn't execl: %s\n", strerror(errno));
		exit(0);
	}

	usleep(500);

	if (_pid == waitpid(_pid, NULL, WNOHANG)) {
		fprintf(stderr, "extmidi: play song failed\n");
		_pid = 0;

		usleep(5000);
	}
}

static void extmidi_stop_song(void)
{
	extmidi_kill();
}

static bool extmidi_is_playing(void)
{
	if (_pid == 0)
		return 0;

	if (waitpid(_pid, NULL, WNOHANG) == _pid) {
		_pid = 0;
		return 0;
	}

	return 1;
}

static void extmidi_set_volume(byte vol)
{
	fprintf(stderr, "extmidi: set volume not implemented\n");
}

const HalMusicDriver _extmidi_music_driver = {
	extmidi_start,
	extmidi_stop,
	extmidi_play_song,
	extmidi_stop_song,
	extmidi_is_playing,
	extmidi_set_volume,
};

#endif /* __MORPHOS__ */
#endif /* __BEOS__ */