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-rw-r--r--src/decoder/plugins/FluidsynthDecoderPlugin.cxx224
1 files changed, 224 insertions, 0 deletions
diff --git a/src/decoder/plugins/FluidsynthDecoderPlugin.cxx b/src/decoder/plugins/FluidsynthDecoderPlugin.cxx
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+++ b/src/decoder/plugins/FluidsynthDecoderPlugin.cxx
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+/*
+ * Copyright (C) 2003-2014 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+#include "FluidsynthDecoderPlugin.hxx"
+#include "../DecoderAPI.hxx"
+#include "CheckAudioFormat.hxx"
+#include "util/Error.hxx"
+#include "util/Domain.hxx"
+#include "util/Macros.hxx"
+#include "Log.hxx"
+
+#include <fluidsynth.h>
+
+static constexpr Domain fluidsynth_domain("fluidsynth");
+
+static unsigned sample_rate;
+static const char *soundfont_path;
+
+/**
+ * Convert a fluidsynth log level to a GLib log level.
+ */
+static LogLevel
+fluidsynth_level_to_mpd(enum fluid_log_level level)
+{
+ switch (level) {
+ case FLUID_PANIC:
+ case FLUID_ERR:
+ return LogLevel::ERROR;
+
+ case FLUID_WARN:
+ return LogLevel::WARNING;
+
+ case FLUID_INFO:
+ return LogLevel::INFO;
+
+ case FLUID_DBG:
+ case LAST_LOG_LEVEL:
+ return LogLevel::DEBUG;
+ }
+
+ /* invalid fluidsynth log level */
+ return LogLevel::INFO;
+}
+
+/**
+ * The fluidsynth logging callback. It forwards messages to the GLib
+ * logging library.
+ */
+static void
+fluidsynth_mpd_log_function(int level, char *message, gcc_unused void *data)
+{
+ Log(fluidsynth_domain,
+ fluidsynth_level_to_mpd(fluid_log_level(level)),
+ message);
+}
+
+static bool
+fluidsynth_init(const config_param &param)
+{
+ Error error;
+
+ sample_rate = param.GetBlockValue("sample_rate", 48000u);
+ if (!audio_check_sample_rate(sample_rate, error)) {
+ LogError(error);
+ return false;
+ }
+
+ soundfont_path = param.GetBlockValue("soundfont",
+ "/usr/share/sounds/sf2/FluidR3_GM.sf2");
+
+ fluid_set_log_function(LAST_LOG_LEVEL,
+ fluidsynth_mpd_log_function, nullptr);
+
+ return true;
+}
+
+static void
+fluidsynth_file_decode(Decoder &decoder, const char *path_fs)
+{
+ char setting_sample_rate[] = "synth.sample-rate";
+ /*
+ char setting_verbose[] = "synth.verbose";
+ char setting_yes[] = "yes";
+ */
+ fluid_settings_t *settings;
+ fluid_synth_t *synth;
+ fluid_player_t *player;
+ int ret;
+
+ /* set up fluid settings */
+
+ settings = new_fluid_settings();
+ if (settings == nullptr)
+ return;
+
+ fluid_settings_setnum(settings, setting_sample_rate, sample_rate);
+
+ /*
+ fluid_settings_setstr(settings, setting_verbose, setting_yes);
+ */
+
+ /* create the fluid synth */
+
+ synth = new_fluid_synth(settings);
+ if (synth == nullptr) {
+ delete_fluid_settings(settings);
+ return;
+ }
+
+ ret = fluid_synth_sfload(synth, soundfont_path, true);
+ if (ret < 0) {
+ LogWarning(fluidsynth_domain, "fluid_synth_sfload() failed");
+ delete_fluid_synth(synth);
+ delete_fluid_settings(settings);
+ return;
+ }
+
+ /* create the fluid player */
+
+ player = new_fluid_player(synth);
+ if (player == nullptr) {
+ delete_fluid_synth(synth);
+ delete_fluid_settings(settings);
+ return;
+ }
+
+ ret = fluid_player_add(player, path_fs);
+ if (ret != 0) {
+ LogWarning(fluidsynth_domain, "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) {
+ LogWarning(fluidsynth_domain, "fluid_player_play() failed");
+ delete_fluid_player(player);
+ delete_fluid_synth(synth);
+ delete_fluid_settings(settings);
+ return;
+ }
+
+ /* initialization complete - announce the audio format to the
+ MPD core */
+
+ const AudioFormat audio_format(sample_rate, SampleFormat::S16, 2);
+ decoder_initialized(decoder, audio_format, false, -1);
+
+ DecoderCommand cmd;
+ while (fluid_player_get_status(player) == FLUID_PLAYER_PLAYING) {
+ int16_t buffer[2048];
+ const unsigned max_frames = ARRAY_SIZE(buffer) / 2;
+
+ /* 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);
+ if (ret != 0)
+ break;
+
+ cmd = decoder_data(decoder, nullptr, buffer, sizeof(buffer),
+ 0);
+ if (cmd != DecoderCommand::NONE)
+ break;
+ }
+
+ /* clean up */
+
+ fluid_player_stop(player);
+ fluid_player_join(player);
+
+ delete_fluid_player(player);
+ delete_fluid_synth(synth);
+ delete_fluid_settings(settings);
+}
+
+static bool
+fluidsynth_scan_file(const char *file,
+ gcc_unused const struct tag_handler *handler,
+ gcc_unused void *handler_ctx)
+{
+ return fluid_is_midifile(file);
+}
+
+static const char *const fluidsynth_suffixes[] = {
+ "mid",
+ nullptr
+};
+
+const struct DecoderPlugin fluidsynth_decoder_plugin = {
+ "fluidsynth",
+ fluidsynth_init,
+ nullptr,
+ nullptr,
+ fluidsynth_file_decode,
+ fluidsynth_scan_file,
+ nullptr,
+ nullptr,
+ fluidsynth_suffixes,
+ nullptr,
+};