added GME support ; added subtune support

1 files changed, 128 insertions, 0 deletions

diff --git a/cgme.c b/cgme.c
new file mode 100644
index 00000000..c6706fb4
--- /dev/null
+++ b/cgme.c
@@ -0,0 +1,128 @@
+#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;
+
+int
+cgme_init (const char *fname, int track, float start, float end) {
+    gme_open_file (fname, &emu, 44100);
+    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 = 44100;
+    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) {
+    if (gme_play (emu, size/2, (short*)bytes)) {
+        return 1;
+    }
+    cgme.info.position += (size/4) / 44100.f;
+    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 > 44100 * 4) {
+                return -1;
+            }
+        }
+        else {
+            nzerosamples = 0;
+        }
+    }
+    if (reallength == -1 && cgme.info.position >= cgme.info.duration) {
+        return -1;
+    }
+    return 0;
+}
+
+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;
+                it->displayname = strdup (str);
+                ps_append_item (it);
+//                printf ("added %s subtune\n", str);
+            }
+            else {
+                printf ("gme error: %s\n", ret);
+            }
+        }
+        if (emu) {
+            gme_delete (emu);
+        }
+    }
+    else {
+        printf ("error adding %s\n", fname);
+    }
+    return 0;
+}
+
+codec_t cgme = {
+    .init = cgme_init,
+    .free = cgme_free,
+    .read = cgme_read,
+    .seek = cgme_seek,
+    .add = cgme_add
+};
+