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playwave.c
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/*
PLAYWAVE: A test application for the SDL mixer library.
Copyright (C) 1997-1999 Sam Lantinga
This program 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; 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 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
Sam Lantinga
5635-34 Springhouse Dr.
Pleasanton, CA 94588 (USA)
slouken@devolution.com
*/
#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_Chunk *wave = NULL;
void CleanUp(void)
{
if ( wave ) {
Mix_FreeChunk(wave);
wave = 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 [-8] [-r rate] [-l] [-m] <wavefile>\n", argv0);
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}
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/*#define TEST_MIX_CHANNELFINISHED*/
#ifdef TEST_MIX_CHANNELFINISHED /* rcg06072001 */
static volatile int channel_is_done = 0;
static void channel_complete_callback(int chan)
{
Mix_Chunk *done_chunk = Mix_GetChunk(chan);
printf("We were just alerted that Mixer channel #%d is done.\n", chan);
printf("Channel's chunk pointer is (%p).\n", done_chunk);
printf(" Which %s correct.\n", (wave == done_chunk) ? "is" : "is NOT");
channel_is_done = 1;
}
#endif
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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 loops = 0;
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int i;
/* Initialize variables */
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audio_rate = MIX_DEFAULT_FREQUENCY;
audio_format = MIX_DEFAULT_FORMAT;
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audio_channels = 2;
/* 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
if ( strcmp(argv[i], "-m") == 0 ) {
audio_channels = 1;
} else
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if ( strcmp(argv[i], "-l") == 0 ) {
loops = -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);
signal(SIGINT, exit);
signal(SIGTERM, exit);
/* Open the audio device */
if (Mix_OpenAudio(audio_rate, audio_format, audio_channels, 4096) < 0) {
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", audio_rate,
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(audio_format&0xFF),
(audio_channels > 1) ? "stereo" : "mono");
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if ( loops ) {
printf(" (looping)\n");
} else {
putchar('\n');
}
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}
audio_open = 1;
/* Load the requested wave file */
wave = Mix_LoadWAV(argv[i]);
if ( wave == NULL ) {
fprintf(stderr, "Couldn't load %s: %s\n",
argv[i], SDL_GetError());
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return(2);
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}
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#ifdef TEST_MIX_CHANNELFINISHED /* rcg06072001 */
setbuf(stdout, NULL);
Mix_ChannelFinished(channel_complete_callback);
#endif
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/* Play and then exit */
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Mix_PlayChannel(0, wave, loops);
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#ifdef TEST_MIX_CHANNELFINISHED /* rcg06072001 */
while (!channel_is_done) {
SDL_Delay(100);
}
#else
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while ( Mix_Playing(0) ) {
SDL_Delay(100);
}
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#endif
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return(0);
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}