134 lines
2.1 KiB
C
134 lines
2.1 KiB
C
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#include "sound.h"
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#include <SDL.h>
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#include <SDL_mixer.h>
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#include <stdio.h>
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#include <stdlib.h>
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Mix_Music *music = NULL;
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int audio_rate = 22050;
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Uint16 audio_format = MIX_DEFAULT_FORMAT;
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int audio_channels = 2;
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int audio_buffers = 8192;
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static Mix_Music *mus;
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static char *next_mus = NULL;
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static int next_fadein = 0;
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static SDL_TimerID timer_id = NULL;
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static Uint32 callback(Uint32 interval, void *aux)
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{
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if (!snd_playing_mus()) {
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if (mus)
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snd_free_mus(mus);
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mus = NULL;
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if (next_mus) {
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snd_play_mus(next_mus, next_fadein);
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free(next_mus);
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next_mus = NULL;
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}
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timer_id = NULL;
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return 0;
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}
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return interval;
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}
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int snd_hz(void)
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{
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int freq = 0;
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Mix_QuerySpec(&freq, NULL, NULL);
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return freq;
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}
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int snd_init(int hz)
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{
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if (!hz)
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hz = audio_rate;
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else
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audio_rate = hz;
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if (Mix_OpenAudio(hz, audio_format, audio_channels, audio_buffers)) {
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fprintf(stderr, "Unable to open audio!\n");
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return -1;
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}
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return 0;
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}
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int snd_volume_mus(int vol)
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{
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Mix_Volume(-1, vol);
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return Mix_VolumeMusic(vol);
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}
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Mix_Music *snd_load_mus(const char *fname)
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{
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Mix_Music *mus;
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mus = Mix_LoadMUS(fname);
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return mus;
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}
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int snd_play_mus(char *fname, int ms)
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{
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if (snd_playing_mus()) {
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if (next_mus) {
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free(next_mus);
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}
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next_mus = strdup(fname);
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next_fadein = ms;
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if (!timer_id)
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timer_id = SDL_AddTimer(200, callback, NULL);
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return 1;
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}
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if (mus)
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snd_free_mus(mus);
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mus = snd_load_mus(fname);
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if (!mus)
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return 0;
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if (ms)
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Mix_FadeInMusic((Mix_Music*)mus, -1, ms);
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else
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Mix_PlayMusic((Mix_Music*)mus, -1);
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snd_volume_mus(snd_volume_mus(-1)); // hack?
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return 0;
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}
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void snd_stop_mus(int ms)
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{
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if (ms)
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Mix_FadeOutMusic(ms);
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else
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Mix_HaltMusic();
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}
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int snd_playing_mus(void)
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{
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if (Mix_PlayingMusic() | Mix_FadingMusic())
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return 1;
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return 0;
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}
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void snd_free_mus(mus_t mus)
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{
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Mix_HaltMusic();
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Mix_FreeMusic((Mix_Music*) mus);
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}
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void snd_done(void)
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{
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Mix_HaltMusic();
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if (timer_id)
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SDL_RemoveTimer(timer_id);
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timer_id = NULL;
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if (mus)
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Mix_FreeMusic((Mix_Music*) mus);
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mus = NULL;
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if (next_mus)
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free(next_mus);
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next_mus = NULL;
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Mix_CloseAudio();
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}
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