149 lines
3.3 KiB
C
149 lines
3.3 KiB
C
/*
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* This is an alternate backend for the music system.
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* It uses SDL_mixer to provide a more reliable playback,
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* and allow processing of multiple audio formats.
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*
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* -- MD2211 (2006-04-24)
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*/
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#include <SDL/SDL.h>
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#include <SDL/SDL_mixer.h>
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#include <string.h>
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#ifdef __unix__
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#include <sys/types.h>
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#include <sys/stat.h>
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#endif
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#ifdef __WINDOWS__
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#include <windows.h>
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#include <dir.h>
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#endif
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#include "args.h"
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#include "hmp2mid.h"
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#include "digi_mixer_music.h"
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#include "jukebox.h"
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#include <stdio.h>
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#include <stdlib.h>
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#ifndef macintosh
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#include <unistd.h>
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#endif
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#include <errno.h>
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#include "cfile.h"
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#define MIX_MUSIC_DEBUG 0
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#define MUSIC_FADE_TIME 500 //milliseconds
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#define MUSIC_EXTENSION_ARG "-music_ext"
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Mix_Music *current_music = NULL;
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void music_done() {
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Mix_HaltMusic();
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Mix_FreeMusic(current_music);
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current_music = NULL;
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jukebox_stop_hook();
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}
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void convert_hmp(char *filename, char *mid_filename) {
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if (MIX_MUSIC_DEBUG) printf("convert_hmp: converting %s to %s\n", filename, mid_filename);
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const char *err;
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CFILE *hmp_in;
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FILE *mid_out = fopen(mid_filename, "w");
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if (!mid_out) {
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fprintf(stderr, "Error could not open: %s for writing: %s\n", mid_filename, strerror(errno));
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return;
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}
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hmp_in = cfopen(filename, "rb");
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if (!hmp_in) {
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fprintf(stderr, "Error could not open: %s\n", filename);
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fclose(mid_out);
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return;
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}
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err = hmp2mid((hmp2mid_read_func_t) cfread, hmp_in, mid_out);
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fclose(mid_out);
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cfclose(hmp_in);
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if (err) {
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fprintf(stderr, "%s\n", err);
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unlink(mid_filename);
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return;
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}
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}
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/* This function handles playback of the internal songs (or their external counterparts) */
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void mix_play_music(char *filename, int loop) {
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loop *= -1;
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int i, got_end=0;
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char *basedir = "Music";
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char rel_filename[32];
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char music_title[16];
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// Quick hack to filter out the .hmp extension
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for (i=0; !got_end; i++) {
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switch (filename[i]) {
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case '.':
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case '\0':
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music_title[i] = '\0';
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got_end = 1;
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break;
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default:
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music_title[i] = filename[i];
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}
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}
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if (!cfexist(basedir))
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mkdir(basedir
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#ifndef __WINDOWS__
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, 0775
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#endif
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); //try making directory
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// What is the extension of external files? If none, default to internal MIDI
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if (GameArg.SndExternalMusic) {
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sprintf(rel_filename, "%s/%s.%3s", basedir, music_title, GameArg.SndExternalMusic); // add extension
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}
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else {
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sprintf(rel_filename, "%s/%s.mid", basedir, music_title);
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convert_hmp(filename, rel_filename);
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}
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mix_play_file("", rel_filename, loop);
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}
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void mix_play_file(char *basedir, char *filename, int loop) {
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int fn_buf_len = strlen(basedir) + strlen(filename) + 1;
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char real_filename[fn_buf_len];
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sprintf(real_filename, "%s%s", basedir, filename); // build absolute path
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if ((current_music = Mix_LoadMUS(real_filename))) {
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if (Mix_PlayingMusic()) {
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// Fade-in effect sounds cleaner if we're already playing something
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Mix_FadeInMusic(current_music, loop, MUSIC_FADE_TIME);
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}
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else {
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Mix_PlayMusic(current_music, loop);
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}
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Mix_HookMusicFinished(music_done);
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}
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else {
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fprintf(stderr, "File %s%s could not be loaded\n", basedir, filename);
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Mix_HaltMusic();
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}
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}
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void mix_set_music_volume(int vol) {
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Mix_VolumeMusic(vol);
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}
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void mix_stop_music() {
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Mix_HaltMusic();
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}
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