SDL-1.2.13 SDL_mixer-1.2.8 測試程序

工程結構：
/SDLTestWav
    ---- /build
        ---- /music
            ---- m2.wav

    ---- CMakeLists.txt

    ---- SdlPlayTest.c

SdlPlayTest.c 清單：

/*
        Sound_Init();
        Sound_Play("123.wav");
*/

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <signal.h>
#ifdef unix
#include <unistd.h>
#endif

#include "SDL.h"
#include "SDL_mixer.h"


static int audio_open = 0;
static Mix_Music *music = NULL;
static int next_track = 0;
static int initresult = -1;

void CleanUp(int exitcode)
{
	if( Mix_PlayingMusic() ) {
		Mix_FadeOutMusic(1500);
		SDL_Delay(1500);
	}
	if ( music ) {
		Mix_FreeMusic(music);
		music = NULL;
	}
	if ( audio_open ) {
		Mix_CloseAudio();
		audio_open = 0;
	}
	SDL_Quit();
	exit(exitcode);
}

void IntHandler(int sig)
{
	switch (sig) {
	        case SIGINT:
			next_track++;
			break;
	}
}

int Sound_Init()
{
        const int    TMP_FREQ = MIX_DEFAULT_FREQUENCY;
        const Uint16 TMP_FORMAT = MIX_DEFAULT_FORMAT;
        const int    TMP_CHAN = 1;
        const int    TMP_CHUNK_SIZE = 4096;

        return Mix_OpenAudio(TMP_FREQ,TMP_FORMAT,TMP_CHAN,TMP_CHUNK_SIZE);
}

int Sound_Play(const char *file_name)
{
        printf("Enter %s filename = %s\n",__func__, file_name);
        if((music = Mix_LoadMUS(file_name)) == NULL)
        {
                printf("call Mix_LoadMUS failed:%s\n",Mix_GetError());
                return -1;
        }

        if(Mix_PlayMusic(music,-1) == -1)
        {
                printf("call Mix_PlayMusic failed\n");
                return -1;
        }
		
	next_track = 0;
	
	/* Play and then exit */
	printf("Playing %s\n", file_name);
	Mix_FadeInMusic(music,0,2000);

	while ( !next_track && (Mix_PlayingMusic() || Mix_PausedMusic()) ) {				
			SDL_Delay(100);
	}
	
	Mix_FreeMusic(music);
	
	music = NULL;

	/* If the user presses Ctrl-C more than once, exit. */
	SDL_Delay(500);		
	CleanUp(0);

<span style="white-space:pre">	</span>printf("after call Mix_PlayMusic\n");

        return 0;
}

int main(int argc, char *argv[])
{
	/* Initialize the SDL library */
	if ( SDL_Init(SDL_INIT_AUDIO) < 0 ) {
		printf("Couldn't initialize SDL: %s\n",SDL_GetError());
		return(255);
	}

	signal(SIGINT, IntHandler);
	signal(SIGTERM, CleanUp);
	
	initresult = Sound_Init();
	printf("call Sound_Init initresult = %d\n",initresult);
	audio_open = 1;

	Sound_Play("./music/m2.wav");

	return 0;
}

 CMakeLists.txt 清單：

cmake_minimum_required(VERSION 2.6)

# Set the project name.
project(sdlplaytest)

# Search for C header files in these directories.
include_directories(/usr/local/include/SDL)

link_directories(/usr/local/lib)

set(APP_SRC ./SdlPlayTest.c)
ADD_EXECUTABLE(sdlplaytest ${APP_SRC})
TARGET_LINK_LIBRARIES( sdlplaytest SDL SDL_mixer)

### CMakeLists.txt ends here