Decoder for game music emulation library.

Supports a number of videogame music formats, more info here:
http://www.fly.net/~ant/libs/audio.html

I wrote this plugin for the latest svn, get it here:
http://code.google.com/p/game-music-emu/source/checkout

1 files changed, 129 insertions, 0 deletions

diff --git a/src/decoder/gme_decoder_plugin.c b/src/decoder/gme_decoder_plugin.c
new file mode 100644
index 00000000..4ca1b2ea
--- /dev/null
+++ b/src/decoder/gme_decoder_plugin.c
@@ -0,0 +1,129 @@
+#include "config.h"
+#include "../decoder_api.h"
+#include "audio_check.h"
+#include <glib.h>
+#include <assert.h>
+#include <gme/gme.h>
+
+#undef G_LOG_DOMAIN
+#define G_LOG_DOMAIN "gme"
+
+#define GME_BUF_SIZE	4096
+
+static void
+gme_file_decode(struct decoder *decoder, const char *path_fs)
+{
+	int sample_rate = 44100;
+	int track = 0; /* index of track to play */
+	float song_len;
+	Music_Emu *emu;
+	gme_info_t *ti;
+	struct audio_format audio_format;
+	enum decoder_command cmd;
+	short buf[GME_BUF_SIZE];
+	const char* gme_err;
+
+	if((gme_err = gme_open_file(path_fs, &emu, sample_rate)) != NULL){
+		g_warning("%s", gme_err);
+		return;
+	}
+	if((gme_err = gme_track_info(emu, &ti, 0)) != NULL){
+		g_warning("%s", gme_err);
+		gme_delete(emu);
+		return;
+	}
+
+	if(ti->length > 0)
+		song_len = ti->length / 1000.0;
+	else song_len = -1;
+
+	/* initialize the MPD decoder */
+
+	GError *error = NULL;
+	if(!audio_format_init_checked(&audio_format, sample_rate, SAMPLE_FORMAT_S16,
+					  2, &error)){
+		g_warning("%s", error->message);
+		g_error_free(error);
+		gme_free_info(ti);
+		gme_delete(emu);
+		return;
+	}
+
+	decoder_initialized(decoder, &audio_format, true, song_len);
+
+	if((gme_err = gme_start_track(emu, track)) != NULL)
+		g_warning("%s", gme_err);
+
+	/* play */
+	do {
+		if((gme_err = gme_play(emu, GME_BUF_SIZE>>1, buf)) != NULL){
+			g_warning("%s", gme_err);
+			return;
+		}
+		cmd = decoder_data(decoder, NULL, buf, GME_BUF_SIZE, 0);
+
+		if(cmd == DECODE_COMMAND_SEEK) {
+			float where = decoder_seek_where(decoder);
+			if((gme_err = gme_seek(emu, (int)where*1000)) != NULL)
+				g_warning("%s", gme_err);
+			decoder_command_finished(decoder);
+		}
+
+		if(gme_track_ended(emu))
+			break;
+	} while(cmd != DECODE_COMMAND_STOP);
+
+	gme_free_info(ti);
+	gme_delete(emu);
+}
+
+static struct tag *
+gme_tag_dup(const char *path_fs)
+{
+	struct tag *tag = tag_new();
+	int sample_rate = 44100;
+	Music_Emu *emu;
+	gme_info_t *ti;
+	const char* gme_err;
+
+	if((gme_err = gme_open_file(path_fs, &emu, sample_rate)) != NULL){
+		g_warning("%s", gme_err);
+		return NULL;
+	}
+	if((gme_err = gme_track_info(emu, &ti, 0)) != NULL){
+		g_warning("%s", gme_err);
+		gme_delete(emu);
+		return NULL;
+	}
+
+	if(ti != NULL){
+		if(ti->length > 0)
+			tag->time = ti->length / 1000;
+		if(ti->song != NULL)
+			tag_add_item(tag, TAG_TITLE, ti->song);
+		if(ti->author != NULL)
+			tag_add_item(tag, TAG_ARTIST, ti->author);
+		if(ti->comment != NULL)
+			tag_add_item(tag, TAG_COMMENT, ti->comment);
+		if(ti->copyright != NULL)
+			tag_add_item(tag, TAG_DATE, ti->copyright);
+	}
+
+	gme_free_info(ti);
+	gme_delete(emu);
+	return tag;
+}
+
+static const char *const gme_suffixes[] = {
+	"ay", "gbs", "gym", "hes", "kss", "nsf",
+	"nsfe", "sap", "spc", "vgm", "vgz",
+	NULL
+};
+
+extern const struct decoder_plugin gme_decoder_plugin;
+const struct decoder_plugin gme_decoder_plugin = {
+	.name = "gme",
+	.file_decode = gme_file_decode,
+	.tag_dup = gme_tag_dup,
+	.suffixes = gme_suffixes,
+};