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/*
DeaDBeeF - ultimate music player for GNU/Linux systems with X11
Copyright (C) 2009 Alexey Yakovenko
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, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "gme/gme.h"
#include "deadbeef.h"
static DB_decoder_t plugin;
static DB_functions_t *deadbeef;
static Music_Emu *emu;
static int reallength;
static int nzerosamples;
static uint32_t cgme_voicemask = 0;
static float duration; // of current song
static int
cgme_init (DB_playItem_t *it) {
if (gme_open_file (it->fname, &emu, deadbeef->playback_get_samplerate ())) {
return -1;
}
gme_mute_voices (emu, cgme_voicemask);
gme_start_track (emu, it->tracknum);
track_info_t inf;
gme_track_info (emu, &inf, it->tracknum);
plugin.info.bps = 16;
plugin.info.channels = 2;
plugin.info.samplerate = deadbeef->playback_get_samplerate ();
duration = it->duration;
reallength = inf.length;
nzerosamples = 0;
plugin.info.readpos = 0;
return 0;
}
static void
cgme_free (void) {
if (emu) {
gme_delete (emu);
emu = NULL;
}
}
static int
cgme_read (char *bytes, int size) {
float t = (size/4) / (float)plugin.info.samplerate;
if (plugin.info.readpos + t >= duration) {
t = duration - plugin.info.readpos;
if (t <= 0) {
return 0;
}
// DON'T ajust size, buffer must always be po2
//size = t * (float)plugin.info.samplerate * 4;
}
if (gme_play (emu, size/2, (short*)bytes)) {
return 0;
}
plugin.info.readpos += 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 > plugin.info.samplerate * 4) {
return 0;
}
}
else {
nzerosamples = 0;
}
}
return size;
}
static int
cgme_seek (float time) {
if (gme_seek (emu, (long)(time * 1000))) {
return -1;
}
plugin.info.readpos = time;
return 0;
}
static DB_playItem_t *
cgme_insert (DB_playItem_t *after, const char *fname) {
// printf ("adding %s chiptune\n", fname);
Music_Emu *emu;
if (!gme_open_file (fname, &emu, gme_info_only)) {
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) {
DB_playItem_t *it = deadbeef->pl_item_alloc ();
it->decoder = &plugin;
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
deadbeef->pl_add_meta (it, "system", inf.system);
deadbeef->pl_add_meta (it, "album", inf.game);
deadbeef->pl_add_meta (it, "title", inf.song);
deadbeef->pl_add_meta (it, "artist", inf.author);
deadbeef->pl_add_meta (it, "copyright", inf.copyright);
deadbeef->pl_add_meta (it, "comment", inf.comment);
deadbeef->pl_add_meta (it, "dumper", inf.dumper);
char trk[10];
snprintf (trk, 10, "%d", i+1);
deadbeef->pl_add_meta (it, "track", trk);
if (inf.length == -1) {
it->duration = 300;
}
else {
it->duration = (float)inf.length/1000.f;
}
const char *ext = fname + strlen (fname) - 1;
while (ext >= fname && *ext != '.') {
ext--;
}
it->filetype = NULL;
if (*ext == '.') {
ext++;
for (int i = 0; plugin.exts[i]; i++) {
if (!strcasecmp (ext, plugin.exts[i])) {
it->filetype = plugin.exts[i];
}
}
}
after = deadbeef->pl_insert_item (after, it);
}
else {
printf ("gme error: %s\n", ret);
}
}
if (emu) {
gme_delete (emu);
}
}
else {
printf ("error adding %s\n", fname);
}
return after;
}
static const char * exts[]=
{
"ay","gbs","gym","hes","kss","nsf","nsfe","sap","spc","vgm","vgz",NULL
};
static int
cgme_numvoices (void) {
if (!emu) {
return 0;
}
return gme_voice_count (emu);
}
static void
cgme_mutevoice (int voice, int mute) {
cgme_voicemask &= ~ (1<<voice);
cgme_voicemask |= ((mute ? 1 : 0) << voice);
if (emu) {
gme_mute_voices (emu, cgme_voicemask);
}
}
// define plugin interface
static DB_decoder_t plugin = {
DB_PLUGIN_SET_API_VERSION
.plugin.version_major = 0,
.plugin.version_minor = 1,
.plugin.type = DB_PLUGIN_DECODER,
.plugin.name = "Game_Music_Emu decoder",
.plugin.descr = "chiptune music player based on GME",
.plugin.author = "Alexey Yakovenko",
.plugin.email = "waker@users.sourceforge.net",
.plugin.website = "http://deadbeef.sf.net",
.init = cgme_init,
.free = cgme_free,
.read_int16 = cgme_read,
.seek = cgme_seek,
.insert = cgme_insert,
.exts = exts,
.id = "stdgme",
.filetypes = exts
};
DB_plugin_t *
gme_load (DB_functions_t *api) {
deadbeef = api;
return DB_PLUGIN (&plugin);
}
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