Files @ r8781:bd977c904a17
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Location: cpp/openttd-patchpack/source/src/music/libtimidity.cpp

bjarni
(svn r12482) -Fix: [build train] we don't need to have a depot in order to just check the price of a rail vehicle so don't check for compatible rails on the tile either
also wagons will only need tracks they can drive on in order to be build so there is no reason to check for power in the depot
/* $Id$ */

#include "../stdafx.h"
#include "../openttd.h"
#include "../sound_type.h"
#include "../variables.h"
#include "../debug.h"
#include "libtimidity.h"
#include <fcntl.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include <signal.h>
#include <sys/stat.h>
#include <errno.h>
#include <timidity.h>
#if defined(PSP)
#include <pspaudiolib.h>
#endif /* PSP */

enum MidiState {
	MIDI_STOPPED = 0,
	MIDI_PLAYING = 1,
};

static struct {
	MidIStream *stream;
	MidSongOptions options;
	MidSong *song;

	MidiState status;
	uint32 song_length;
	uint32 song_position;
} _midi;

#if defined(PSP)
static void AudioOutCallback(void *buf, unsigned int _reqn, void *userdata)
{
	memset(buf, 0, _reqn * PSP_NUM_AUDIO_CHANNELS);
	if (_midi.status == MIDI_PLAYING) {
		mid_song_read_wave(_midi.song, buf, _reqn * PSP_NUM_AUDIO_CHANNELS);
	}
}
#endif /* PSP */

static FMusicDriver_LibTimidity iFMusicDriver_LibTimidity;

const char *MusicDriver_LibTimidity::Start(const char *const *param)
{
	_midi.status = MIDI_STOPPED;

	if (mid_init(param == NULL ? NULL : (char *)param[0]) < 0) {
		/* If init fails, it can be because no configuration was found.
		 *  If it was not forced via param, try to load it without a
		 *  configuration. Who knows that works. */
		if (param != NULL || mid_init_no_config() < 0) {
			return "error initializing timidity";
		}
	}
	DEBUG(driver, 1, "successfully initialised timidity");

	_midi.options.rate = 44100;
	_midi.options.format = MID_AUDIO_S16LSB;
	_midi.options.channels = 2;
#if defined(PSP)
	_midi.options.buffer_size = PSP_NUM_AUDIO_SAMPLES;
#else
	_midi.options.buffer_size = _midi.options.rate;
#endif

#if defined(PSP)
	pspAudioInit();
	pspAudioSetChannelCallback(_midi.options.channels, &AudioOutCallback, NULL);
	pspAudioSetVolume(_midi.options.channels, PSP_VOLUME_MAX, PSP_VOLUME_MAX);
#endif /* PSP */

	return NULL;
}

void MusicDriver_LibTimidity::Stop()
{
	if (_midi.status == MIDI_PLAYING) {
		_midi.status = MIDI_STOPPED;
		mid_song_free(_midi.song);
	}
	mid_exit();
}

void MusicDriver_LibTimidity::PlaySong(const char *filename)
{
	_midi.stream = mid_istream_open_file(filename);
	if (_midi.stream == NULL) {
		DEBUG(driver, 0, "Could not open music file");
		return;
	}

	_midi.song = mid_song_load(_midi.stream, &_midi.options);
	mid_istream_close(_midi.stream);
	_midi.song_length = mid_song_get_total_time(_midi.song);

	if (_midi.song == NULL) {
		DEBUG(driver, 1, "Invalid MIDI file");
		return;
	}

	mid_song_start(_midi.song);
	_midi.status = MIDI_PLAYING;
}

void MusicDriver_LibTimidity::StopSong()
{
	_midi.status = MIDI_STOPPED;
	mid_song_free(_midi.song);
}

bool MusicDriver_LibTimidity::IsSongPlaying()
{
	if (_midi.status == MIDI_PLAYING) {
		_midi.song_position = mid_song_get_time(_midi.song);
		if (_midi.song_position >= _midi.song_length) {
			_midi.status = MIDI_STOPPED;
			_midi.song_position = 0;
		}
	}

	return (_midi.status == MIDI_PLAYING);
}

void MusicDriver_LibTimidity::SetVolume(byte vol)
{
	if (_midi.song != NULL)
		mid_song_set_volume(_midi.song, vol);
}