From 90b967d9d1b5970969f758c7993d244936fff324 Mon Sep 17 00:00:00 2001
From: zlago
Date: Sun, 1 Sep 2024 18:14:38 +0200
Subject: libfluidsynth

---
 GNUmakefile              |  2 +-
 src/modules/fluidsynth.c | 57 ++++++++++++++++++++++++++++++++++++++++++++++++
 src/sdl.c                | 19 ++++++++++++++--
 3 files changed, 75 insertions(+), 3 deletions(-)
 create mode 100644 src/modules/fluidsynth.c

diff --git a/GNUmakefile b/GNUmakefile
index 6f110de..58990fd 100644
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -3,7 +3,7 @@
 GLAD ?= glad
 MKDIR ?= mkdir -p
 
-libs ::= SDL2 openmpt
+libs ::= SDL2 openmpt fluidsynth
 cflags ::= -I . -g -Og ${CFLAGS}
 ldflags ::= -Wl,--rpath,'$$ORIGIN' $(addprefix -l,${libs}) ${LDFLAGS}
 
diff --git a/src/modules/fluidsynth.c b/src/modules/fluidsynth.c
new file mode 100644
index 0000000..fd3c874
--- /dev/null
+++ b/src/modules/fluidsynth.c
@@ -0,0 +1,57 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include "../include.h"
+
+#include <fluidsynth.h>
+
+struct fluidsynth_userdata {
+	fluid_settings_t *settings;
+	fluid_synth_t *synth;
+	fluid_player_t *player;
+	int soundfont;
+};
+
+
+static void fluidsynth_callback(void *userdata, unsigned char *stream, int const length) {
+	struct fluidsynth_userdata *fs = userdata;
+	fluid_synth_write_float(fs->synth, length / sizeof (float) / 2, stream, 0, 2, stream, 1, 2);
+}
+
+static void fluidsynth_free(void *ptr) {
+	struct fluidsynth_userdata *fs = ptr;
+	fluid_player_stop(fs->player);
+	delete_fluid_player(fs->player);
+	fluid_player_play(fs->player);
+	fluid_synth_sfunload(fs->synth, fs->soundfont, 0);
+	delete_fluid_synth(fs->synth);
+	delete_fluid_settings(fs->settings);
+	free(fs);
+}
+
+int module_fluidsynth(struct blob *file, struct userdata *userdata) {
+	struct fluidsynth_userdata *fs = malloc(sizeof (struct fluidsynth_userdata));
+	if (fs == NULL) {
+		return 1;
+	}
+	fs->settings = new_fluid_settings(); // wasteful, but when trying to 'fix' it it just caused more errors
+	fluid_settings_setnum(fs->settings, "synth.gain", 0.5);
+	fluid_settings_setint(fs->settings, "player.reset-synth", 0);
+	fluid_settings_setnum(fs->settings, "synth.sample-rate", 48000);
+	fs->synth = new_fluid_synth(fs->settings);
+	char *soundfont_path = getenv("SOUNDFONT");
+	if (soundfont_path == NULL) {
+		soundfont_path = "/usr/share/sounds/sf2/default-GM.sf2";
+	}
+	fs->soundfont = fluid_synth_sfload(fs->synth, soundfont_path, 1); // ugly hack
+	fs->player = new_fluid_player(fs->synth);
+	fluid_player_set_loop(fs->player, -1);
+	if (fluid_player_add_mem(fs->player, file->data, file->size) == FLUID_FAILED) {
+		fluidsynth_free(fs);
+		return 1;
+	}
+	fluid_player_play(fs->player);
+	userdata->callback = fluidsynth_callback;
+	userdata->user = fs;
+	userdata->freefunc = fluidsynth_free;
+	return 0;
+}
diff --git a/src/sdl.c b/src/sdl.c
index 875cde5..8deb8ca 100644
--- a/src/sdl.c
+++ b/src/sdl.c
@@ -8,6 +8,7 @@
 #include "include.h"
 
 int module_openmpt(struct blob *file, struct userdata *userdata);
+int module_fluidsynth(struct blob *file, struct userdata *userdata);
 
 #define eprintf(...) fprintf(stderr, __VA_ARGS__)
 
@@ -103,9 +104,22 @@ int main(void) {
 						SDL_free(evt.drop.file);
 						break;
 					}
-					SDL_free(evt.drop.file);
 					struct userdata newuser = {.callback = NULL, .freefunc = NULL};
-					if (module_openmpt(&file, audio, &newuser)) {
+					int (*module_func)(struct blob *, struct userdata *) = NULL;
+					size_t len = strlen(evt.drop.file);
+					#define ext(extension) memcmp(evt.drop.file + len - sizeof (extension) + 1, extension, sizeof (extension))
+					if ((ext(".mptm") && ext(".mod") && ext(".xm") && ext(".s3m") && ext(".it")) == 0) {
+						module_func = module_openmpt;
+					} else if ((ext(".mid") && ext(".midi")) == 0) {
+						module_func = module_fluidsynth;
+					}
+					if (module_func == NULL) {
+						eprintf("%s: unrecognized file extension\n", evt.drop.file);
+						free(file.data);
+						break;
+					}
+					SDL_free(evt.drop.file);
+					if (module_func(&file, &newuser)) {
 						// error
 					} else {
 						SDL_LockAudioDevice(audio);
@@ -126,6 +140,7 @@ int main(void) {
 	if (userdata.freefunc != NULL) {
 		SDL_LockAudioDevice(audio);
 		userdata.freefunc(userdata.user);
+		SDL_PauseAudioDevice(audio, 1);
 		SDL_UnlockAudioDevice(audio);
 	}
 	
-- 
cgit 1.4.1-2-gfad0