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authorMax Kellermann <max@duempel.org>2009-02-12 08:43:26 +0100
committerMax Kellermann <max@duempel.org>2009-02-12 08:43:26 +0100
commite56a90f3b343217671327aba2ecdca8709463331 (patch)
tree0ab34e9937cd5080db0a4dd0a571ec1874f41fb0 /src/decoder/fluidsynth_plugin.c
parentde2e13cafe7157fa08893824c4fdbdae343c6d2e (diff)
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fluidsynth: new decoder plugin for MIDI files
There are a few problems left in this plugin: - fluidsynth decodes in real time, while MPD prefers to buffer as quickly as possible; as a workaround, this plugin uses a timer object to synchronize with real-time playback - I don't know yet how fluidsynth tells me when the song has ended - the "soundfont" configuration setting is not yet documented, and it will likely change soon (in favor of a per-decoder configuration block)
Diffstat (limited to 'src/decoder/fluidsynth_plugin.c')
-rw-r--r--src/decoder/fluidsynth_plugin.c233
1 files changed, 233 insertions, 0 deletions
diff --git a/src/decoder/fluidsynth_plugin.c b/src/decoder/fluidsynth_plugin.c
new file mode 100644
index 000000000..3a744d2f9
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+++ b/src/decoder/fluidsynth_plugin.c
@@ -0,0 +1,233 @@
+/*
+ * Copyright (C) 2003-2009 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include "../decoder_api.h"
+#include "../timer.h"
+#include "../conf.h"
+
+#include <glib.h>
+
+#include <fluidsynth.h>
+
+#undef G_LOG_DOMAIN
+#define G_LOG_DOMAIN "fluidsynth"
+
+/**
+ * Convert a fluidsynth log level to a GLib log level.
+ */
+static GLogLevelFlags
+fluidsynth_level_to_glib(enum fluid_log_level level)
+{
+ switch (level) {
+ case FLUID_PANIC:
+ case FLUID_ERR:
+ return G_LOG_LEVEL_CRITICAL;
+
+ case FLUID_WARN:
+ return G_LOG_LEVEL_WARNING;
+
+ case FLUID_INFO:
+ return G_LOG_LEVEL_INFO;
+
+ case FLUID_DBG:
+ case LAST_LOG_LEVEL:
+ return G_LOG_LEVEL_DEBUG;
+ }
+
+ /* invalid fluidsynth log level */
+ return G_LOG_LEVEL_MESSAGE;
+}
+
+/**
+ * The fluidsynth logging callback. It forwards messages to the GLib
+ * logging library.
+ */
+static void
+fluidsynth_mpd_log_function(int level, char *message, G_GNUC_UNUSED void *data)
+{
+ g_log(G_LOG_DOMAIN, fluidsynth_level_to_glib(level), "%s", message);
+}
+
+static bool
+fluidsynth_init(void)
+{
+ fluid_set_log_function(LAST_LOG_LEVEL,
+ fluidsynth_mpd_log_function, NULL);
+
+ return true;
+}
+
+static void
+fluidsynth_file_decode(struct decoder *decoder, const char *path_fs)
+{
+ static const struct audio_format audio_format = {
+ .sample_rate = 48000,
+ .bits = 16,
+ .channels = 2,
+ };
+ char setting_sample_rate[] = "synth.sample-rate";
+ /*
+ char setting_verbose[] = "synth.verbose";
+ char setting_yes[] = "yes";
+ */
+ const char *soundfont_path;
+ fluid_settings_t *settings;
+ fluid_synth_t *synth;
+ fluid_player_t *player;
+ char *path_dup;
+ int ret;
+ Timer *timer;
+ enum decoder_command cmd;
+
+ soundfont_path =
+ config_get_string("soundfont",
+ "/usr/share/sounds/sf2/FluidR3_GM.sf2");
+
+ /* set up fluid settings */
+
+ settings = new_fluid_settings();
+ if (settings == NULL)
+ return;
+
+ fluid_settings_setnum(settings, setting_sample_rate, 48000);
+
+ /*
+ fluid_settings_setstr(settings, setting_verbose, setting_yes);
+ */
+
+ /* create the fluid synth */
+
+ synth = new_fluid_synth(settings);
+ if (synth == NULL) {
+ delete_fluid_settings(settings);
+ return;
+ }
+
+ ret = fluid_synth_sfload(synth, soundfont_path, true);
+ if (ret < 0) {
+ g_warning("fluid_synth_sfload() failed");
+ delete_fluid_synth(synth);
+ delete_fluid_settings(settings);
+ return;
+ }
+
+ /* create the fluid player */
+
+ player = new_fluid_player(synth);
+ if (player == NULL) {
+ delete_fluid_synth(synth);
+ delete_fluid_settings(settings);
+ return;
+ }
+
+ /* temporarily duplicate the path_fs string, because
+ fluidsynth wants a writable string */
+ path_dup = g_strdup(path_fs);
+ ret = fluid_player_add(player, path_dup);
+ g_free(path_dup);
+ if (ret != 0) {
+ g_warning("fluid_player_add() failed");
+ delete_fluid_player(player);
+ delete_fluid_synth(synth);
+ delete_fluid_settings(settings);
+ return;
+ }
+
+ /* start the player */
+
+ ret = fluid_player_play(player);
+ if (ret != 0) {
+ g_warning("fluid_player_play() failed");
+ delete_fluid_player(player);
+ delete_fluid_synth(synth);
+ delete_fluid_settings(settings);
+ return;
+ }
+
+ /* set up a timer for synchronization; fluidsynth always
+ decodes in real time, which forces us to synchronize */
+ /* XXX is there any way to switch off real-time decoding? */
+
+ timer = timer_new(&audio_format);
+ timer_start(timer);
+
+ /* initialization complete - announce the audio format to the
+ MPD core */
+
+ decoder_initialized(decoder, &audio_format, false, -1);
+
+ do {
+ int16_t buffer[2048];
+ const unsigned max_frames = G_N_ELEMENTS(buffer) / 2;
+
+ /* synchronize with the fluid player */
+
+ timer_add(timer, sizeof(buffer));
+ timer_sync(timer);
+
+ /* read samples from fluidsynth and send them to the
+ MPD core */
+
+ ret = fluid_synth_write_s16(synth, max_frames,
+ buffer, 0, 2,
+ buffer, 1, 2);
+ /* XXX how do we see whether the player is done? We
+ can't access the private attribute
+ player->status */
+ if (ret != 0)
+ break;
+
+ cmd = decoder_data(decoder, NULL, buffer, sizeof(buffer),
+ 0, 0, NULL);
+ } while (cmd == DECODE_COMMAND_NONE);
+
+ /* clean up */
+
+ timer_free(timer);
+
+ fluid_player_stop(player);
+ fluid_player_join(player);
+
+ delete_fluid_player(player);
+ delete_fluid_synth(synth);
+ delete_fluid_settings(settings);
+}
+
+static struct tag *
+fluidsynth_tag_dup(const char *file)
+{
+ struct tag *tag = tag_new();
+
+ /* to be implemented */
+ (void)file;
+
+ return tag;
+}
+
+static const char *const fluidsynth_suffixes[] = {
+ "mid",
+ NULL
+};
+
+const struct decoder_plugin fluidsynth_decoder_plugin = {
+ .name = "fluidsynth",
+ .init = fluidsynth_init,
+ .file_decode = fluidsynth_file_decode,
+ .tag_dup = fluidsynth_tag_dup,
+ .suffixes = fluidsynth_suffixes,
+};