playmus.c
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/*
PLAYMUS: A test application for the SDL mixer library.
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Copyright (C) 1997-2004 Sam Lantinga
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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.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Sam Lantinga
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slouken@libsdl.org
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*/
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/* $Id$ */
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#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <signal.h>
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#ifdef unix
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#include <unistd.h>
#endif
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#include "SDL.h"
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#include "SDL_mixer.h"
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static int audio_open = 0;
static Mix_Music *music = NULL;
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static int next_track = 0;
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void CleanUp(void)
{
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if( Mix_PlayingMusic() ) {
Mix_FadeOutMusic(1500);
SDL_Delay(1500);
}
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if ( music ) {
Mix_FreeMusic(music);
music = NULL;
}
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if ( audio_open ) {
Mix_CloseAudio();
audio_open = 0;
}
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SDL_Quit();
}
void Usage(char *argv0)
{
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fprintf(stderr, "Usage: %s [-i] [-l] [-8] [-r rate] [-b buffers] [-v N] <musicfile>\n", argv0);
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void Menu(void)
{
char buf[10];
printf("Available commands: (p)ause (r)esume (h)alt > ");
fflush(stdin);
scanf("%s",buf);
switch(buf[0]){
case 'p': case 'P':
Mix_PauseMusic();
break;
case 'r': case 'R':
Mix_ResumeMusic();
break;
case 'h': case 'H':
Mix_HaltMusic();
break;
}
printf("Music playing: %s Paused: %s\n", Mix_PlayingMusic() ? "yes" : "no",
Mix_PausedMusic() ? "yes" : "no");
}
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void IntHandler(int sig)
{
switch (sig) {
case SIGINT:
next_track++;
break;
}
}
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int main(int argc, char *argv[])
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int audio_rate;
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Uint16 audio_format;
int audio_channels;
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int audio_buffers;
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int audio_volume = MIX_MAX_VOLUME;
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int looping = 0;
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int interactive = 0;
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int i;
/* Initialize variables */
audio_rate = 22050;
audio_format = AUDIO_S16;
audio_channels = 2;
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audio_buffers = 4096;
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/* Check command line usage */
for ( i=1; argv[i] && (*argv[i] == '-'); ++i ) {
if ( (strcmp(argv[i], "-r") == 0) && argv[i+1] ) {
++i;
audio_rate = atoi(argv[i]);
} else
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if ( (strcmp(argv[i], "-b") == 0) && argv[i+1] ) {
++i;
audio_buffers = atoi(argv[i]);
} else
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if ( (strcmp(argv[i], "-v") == 0) && argv[i+1] ) {
++i;
audio_volume = atoi(argv[i]);
} else
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if ( strcmp(argv[i], "-m") == 0 ) {
audio_channels = 1;
} else
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if ( strcmp(argv[i], "-l") == 0 ) {
looping = -1;
} else
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if ( strcmp(argv[i], "-i") == 0 ) {
interactive = 1;
} else
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if ( strcmp(argv[i], "-8") == 0 ) {
audio_format = AUDIO_U8;
} else {
Usage(argv[0]);
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return(1);
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}
}
if ( ! argv[i] ) {
Usage(argv[0]);
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return(1);
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}
/* Initialize the SDL library */
if ( SDL_Init(SDL_INIT_AUDIO) < 0 ) {
fprintf(stderr, "Couldn't initialize SDL: %s\n",SDL_GetError());
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return(255);
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}
atexit(CleanUp);
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signal(SIGINT, IntHandler);
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signal(SIGTERM, exit);
/* Open the audio device */
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if (Mix_OpenAudio(audio_rate, audio_format, audio_channels, audio_buffers) < 0) {
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fprintf(stderr, "Couldn't open audio: %s\n", SDL_GetError());
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return(2);
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} else {
Mix_QuerySpec(&audio_rate, &audio_format, &audio_channels);
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printf("Opened audio at %d Hz %d bit %s, %d bytes audio buffer\n", audio_rate,
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(audio_format&0xFF),
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(audio_channels > 1) ? "stereo" : "mono",
audio_buffers );
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}
audio_open = 1;
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/* Set the music volume */
Mix_VolumeMusic(audio_volume);
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/* Set the external music player, if any */
Mix_SetMusicCMD(getenv("MUSIC_CMD"));
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while (argv[i]) {
next_track = 0;
/* Load the requested music file */
music = Mix_LoadMUS(argv[i]);
if ( music == NULL ) {
fprintf(stderr, "Couldn't load %s: %s\n",
argv[i], SDL_GetError());
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return(2);
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}
/* Play and then exit */
printf("Playing %s\n", argv[i]);
Mix_FadeInMusic(music,looping,2000);
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while ( !next_track && (Mix_PlayingMusic() || Mix_PausedMusic()) ) {
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if(interactive)
Menu();
else
SDL_Delay(100);
}
Mix_FreeMusic(music);
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music = NULL;
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/* If the user presses Ctrl-C more than once, exit. */
SDL_Delay(500);
if ( next_track > 1 ) break;
i++;
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}
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return(0);
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}