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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 "fs/Path.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 MPD 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 MPD
* 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 ¶m)
{
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, Path 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.c_str());
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,
SignedSongTime::Negative());
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(Path path_fs,
gcc_unused const struct tag_handler *handler,
gcc_unused void *handler_ctx)
{
return fluid_is_midifile(path_fs.c_str());
}
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,
};
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