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Diffstat (limited to 'src/decoder/plugins/FluidsynthDecoderPlugin.cxx')
| -rw-r--r-- | src/decoder/plugins/FluidsynthDecoderPlugin.cxx | 225 |
1 files changed, 225 insertions, 0 deletions
diff --git a/src/decoder/plugins/FluidsynthDecoderPlugin.cxx b/src/decoder/plugins/FluidsynthDecoderPlugin.cxx new file mode 100644 index 000000000..bdf30baea --- /dev/null +++ b/src/decoder/plugins/FluidsynthDecoderPlugin.cxx @@ -0,0 +1,225 @@ +/* + * 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 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 ¶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, -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(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, +}; |