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

4 files changed, 158 insertions, 0 deletions

diff --git a/Makefile.am b/Makefile.am
index aa7b70997..86b0246fa 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -411,6 +411,7 @@ DECODER_CFLAGS = \
 	$(AUDIOFILE_CFLAGS) \
 	$(LIBMIKMOD_CFLAGS) \
 	$(MODPLUG_CFLAGS) \
+	$(GME_CFLAGS) \
 	$(SIDPLAY_CFLAGS) \
 	$(FLUIDSYNTH_CFLAGS) \
 	$(WILDMIDI_CFLAGS) \
@@ -426,6 +427,7 @@ DECODER_LIBS = \
 	$(SNDFILE_LIBS) \
 	$(AUDIOFILE_LIBS) $(LIBMIKMOD_LIBS) \
 	$(MODPLUG_LIBS) \
+	$(GME_LIBS) \
 	$(SIDPLAY_LIBS) \
 	$(FLUIDSYNTH_LIBS) \
 	$(WILDMIDI_LIBS) \
@@ -520,6 +522,10 @@ if ENABLE_SNDFILE
 DECODER_SRC += src/decoder/sndfile_decoder_plugin.c
 endif
 
+if HAVE_GME
+DECODER_SRC += src/decoder/gme_decoder_plugin.c
+endif
+
 # encoder plugins
 
 ENCODER_CFLAGS = \
diff --git a/configure.ac b/configure.ac
index 0c2d694bb..8ae21793a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -527,6 +527,18 @@ if test x$enable_modplug = xyes; then
 	AC_DEFINE(HAVE_MODPLUG, 1, [Define for modplug support])
 fi
 
+AC_ARG_ENABLE(gme,
+	AS_HELP_STRING([--enable-gme],
+		[enable Blargg's game music emulator plugin]),,
+	enable_gme=auto)
+
+MPD_AUTO_PKG(gme, GME, [libgme],
+	[gme decoder plugin], [libgme not found])
+AM_CONDITIONAL(HAVE_GME, test x$enable_gme = xyes)
+if test x$enable_gme = xyes; then
+	AC_DEFINE(HAVE_GME, 1, [Define for gme support])
+fi
+
 AC_ARG_ENABLE(mpc,
 	AS_HELP_STRING([--disable-mpc],
 		[disable musepack (MPC) support (default: enable)]),,
@@ -1547,6 +1559,12 @@ else
 	echo " MODPLUG support ...............disabled"
 fi
 
+if test x$enable_gme = xyes; then
+	echo " GME support ....................enabled"
+else
+	echo " GME support ...................disabled"
+fi
+
 if test x$enable_mad = xyes; then
 	echo " MAD mp3 decoder support .......enabled"
 else
@@ -1633,6 +1651,7 @@ if
 	test x$enable_ffmpeg = xno &&
 	test x$enable_modplug = xno &&
 	test x$enable_sidplay = xno &&
+	test x$enable_gme = xno &&
 	test x$enable_fluidsynth = xno &&
 	test x$enable_wildmidi = xno &&
 	test x$enable_mp4 = xno &&
diff --git a/src/decoder/gme_decoder_plugin.c b/src/decoder/gme_decoder_plugin.c
new file mode 100644
index 000000000..4ca1b2eaf
--- /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,
+};
diff --git a/src/decoder_list.c b/src/decoder_list.c
index 6c8db8fb5..f91d635dc 100644
--- a/src/decoder_list.c
+++ b/src/decoder_list.c
@@ -44,6 +44,7 @@ extern const struct decoder_plugin sidplay_decoder_plugin;
 extern const struct decoder_plugin wildmidi_decoder_plugin;
 extern const struct decoder_plugin fluidsynth_decoder_plugin;
 extern const struct decoder_plugin ffmpeg_decoder_plugin;
+extern const struct decoder_plugin gme_decoder_plugin;
 
 const struct decoder_plugin *const decoder_plugins[] = {
 #ifdef HAVE_MAD
@@ -97,6 +98,9 @@ const struct decoder_plugin *const decoder_plugins[] = {
 #ifdef HAVE_FFMPEG
 	&ffmpeg_decoder_plugin,
 #endif
+#ifdef HAVE_GME
+	&gme_decoder_plugin,
+#endif
 	NULL
 };