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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "gme/gme.h"
#include "codec.h"
#include "cgme.h"
#include "playlist.h"
static Music_Emu *emu;
static int reallength;
static int nzerosamples;
extern int sdl_player_freq; // hack!
int
cgme_init (const char *fname, int track, float start, float end) {
if (gme_open_file (fname, &emu, sdl_player_freq)) {
return -1;
}
gme_start_track (emu, track);
track_info_t inf;
gme_track_info (emu, &inf, track);
cgme.info.bitsPerSample = 16;
cgme.info.channels = 2;
cgme.info.samplesPerSecond = sdl_player_freq;
reallength = inf.length;
nzerosamples = 0;
if (inf.length == -1) {
cgme.info.duration = 120;
}
else {
cgme.info.duration = (float)inf.length/1000.f;
}
cgme.info.position = 0;
return 0;
}
void
cgme_free (void) {
if (emu) {
gme_delete (emu);
emu = NULL;
}
}
int
cgme_read (char *bytes, int size) {
float t = (size/4) / (float)cgme.info.samplesPerSecond;
if (cgme.info.position + t >= cgme.info.duration) {
t = cgme.info.duration - cgme.info.position;
if (t <= 0) {
return 0;
}
// DON'T ajust size, buffer must always be po2
//size = t * (float)cgme.info.samplesPerSecond * 4;
}
if (gme_play (emu, size/2, (short*)bytes)) {
return 0;
}
cgme.info.position += t;
if (reallength == -1) {
// check if whole buffer is zeroes
int i;
for (i = 0; i < size; i++) {
if (bytes[i]) {
break;
}
}
if (i == size) {
nzerosamples += size / 4;
if (nzerosamples > cgme.info.samplesPerSecond * 4) {
return 0;
}
}
else {
nzerosamples = 0;
}
}
return size;
}
int
cgme_seek (float time) {
if (gme_seek (emu, (long)(time * 1000))) {
return -1;
}
cgme.info.position = time;
return 0;
}
int
cgme_add (const char *fname) {
// printf ("adding %s chiptune\n", fname);
Music_Emu *emu;
if (!gme_open_file (fname, &emu, 44100)) {
int cnt = gme_track_count (emu);
for (int i = 0; i < cnt; i++) {
track_info_t inf;
const char *ret = gme_track_info (emu, &inf, i);
if (!ret) {
playItem_t *it = malloc (sizeof (playItem_t));
memset (it, 0, sizeof (playItem_t));
it->codec = &cgme;
it->fname = strdup (fname);
char str[1024];
if (inf.song[0]) {
snprintf (str, 1024, "%d %s - %s", i, inf.game, inf.song);
}
else {
snprintf (str, 1024, "%d %s - ?", i, inf.game);
}
it->tracknum = i;
// add metadata
ps_add_meta (it, "system", inf.system);
ps_add_meta (it, "album", inf.game);
ps_add_meta (it, "title", inf.song);
ps_add_meta (it, "artist", inf.author);
ps_add_meta (it, "copyright", inf.copyright);
ps_add_meta (it, "comment", inf.comment);
ps_add_meta (it, "dumper", inf.dumper);
char trk[10];
snprintf (trk, 10, "%d", i+1);
ps_add_meta (it, "track", trk);
ps_append_item (it);
}
else {
printf ("gme error: %s\n", ret);
}
}
if (emu) {
gme_delete (emu);
}
}
else {
printf ("error adding %s\n", fname);
}
return 0;
}
static const char * exts[]=
{
"ay","gbs","gym","hes","kss","nsf","nsfe","sap","spc","vgm","vgz",NULL
};
const char **cgme_getexts (void) {
return exts;
}
codec_t cgme = {
.init = cgme_init,
.free = cgme_free,
.read = cgme_read,
.seek = cgme_seek,
.add = cgme_add,
.getexts = cgme_getexts
};
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