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129 lines
3.4 KiB
C++
129 lines
3.4 KiB
C++
/* $Id$ */
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/*
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* This file is part of OpenTTD.
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* OpenTTD 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, version 2.
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* OpenTTD 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.
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* See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
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*/
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/** @file libtimidity.cpp Playing music via the timidity library. */
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#include "../stdafx.h"
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#include "../openttd.h"
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#include "../sound_type.h"
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#include "../debug.h"
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#include "libtimidity.h"
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#include "midifile.hpp"
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#include "../base_media_base.h"
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#include <fcntl.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <unistd.h>
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#include <signal.h>
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#include <sys/stat.h>
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#include <errno.h>
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#include <timidity.h>
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#include "../safeguards.h"
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/** The state of playing. */
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enum MidiState {
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MIDI_STOPPED = 0,
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MIDI_PLAYING = 1,
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};
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static struct {
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MidIStream *stream;
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MidSongOptions options;
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MidSong *song;
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MidiState status;
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uint32 song_length;
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uint32 song_position;
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} _midi; ///< Metadata about the midi we're playing.
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/** Factory for the libtimidity driver. */
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static FMusicDriver_LibTimidity iFMusicDriver_LibTimidity;
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const char *MusicDriver_LibTimidity::Start(const char * const *param)
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{
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_midi.status = MIDI_STOPPED;
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_midi.song = NULL;
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if (mid_init(param == NULL ? NULL : const_cast<char *>(param[0])) < 0) {
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/* If init fails, it can be because no configuration was found.
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* If it was not forced via param, try to load it without a
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* configuration. Who knows that works. */
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if (param != NULL || mid_init_no_config() < 0) {
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return "error initializing timidity";
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}
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}
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DEBUG(driver, 1, "successfully initialised timidity");
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_midi.options.rate = 44100;
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_midi.options.format = MID_AUDIO_S16LSB;
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_midi.options.channels = 2;
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_midi.options.buffer_size = _midi.options.rate;
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return NULL;
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}
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void MusicDriver_LibTimidity::Stop()
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{
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if (_midi.status == MIDI_PLAYING) this->StopSong();
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mid_exit();
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}
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void MusicDriver_LibTimidity::PlaySong(const MusicSongInfo &song)
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{
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std::string filename = MidiFile::GetSMFFile(song);
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this->StopSong();
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if (filename.empty()) return;
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_midi.stream = mid_istream_open_file(filename.c_str());
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if (_midi.stream == NULL) {
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DEBUG(driver, 0, "Could not open music file");
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return;
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}
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_midi.song = mid_song_load(_midi.stream, &_midi.options);
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mid_istream_close(_midi.stream);
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_midi.song_length = mid_song_get_total_time(_midi.song);
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if (_midi.song == NULL) {
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DEBUG(driver, 1, "Invalid MIDI file");
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return;
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}
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mid_song_start(_midi.song);
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_midi.status = MIDI_PLAYING;
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}
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void MusicDriver_LibTimidity::StopSong()
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{
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_midi.status = MIDI_STOPPED;
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/* mid_song_free cannot handle NULL! */
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if (_midi.song != NULL) mid_song_free(_midi.song);
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_midi.song = NULL;
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}
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bool MusicDriver_LibTimidity::IsSongPlaying()
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{
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if (_midi.status == MIDI_PLAYING) {
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_midi.song_position = mid_song_get_time(_midi.song);
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if (_midi.song_position >= _midi.song_length) {
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_midi.status = MIDI_STOPPED;
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_midi.song_position = 0;
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}
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}
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return (_midi.status == MIDI_PLAYING);
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}
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void MusicDriver_LibTimidity::SetVolume(byte vol)
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{
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if (_midi.song != NULL) mid_song_set_volume(_midi.song, vol);
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}
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