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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* 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 "common/system.h"
#include "common/events.h"
#include "engines/engine.h"
#include "audio/audiostream.h"
#include "audio/decoders/raw.h"
#include "adl/speaker.h"
#include "adl/adl.h"
namespace Adl {
// Number of times to duplicate each sample
#define SAMPLE_DUP 4
// Bell frequency in Hz
#define BELL_FREQ 1000
// Sample rate
#define SAMPLE_RATE (BELL_FREQ * SAMPLE_DUP * 2)
// Number of waves per 0.1 seconds (bell length)
#define BELL_WAVE_COUNT (SAMPLE_RATE / 10 / SAMPLE_DUP / 2)
// Length of bell in samples
#define BELL_LEN (BELL_WAVE_COUNT * SAMPLE_DUP * 2)
// Length of silence in samples
#define SILENCE_LEN (SAMPLE_RATE / 80)
Speaker::~Speaker() {
delete[] _bell;
delete[] _silence;
}
Speaker::Speaker() {
_bell = new byte[BELL_LEN];
byte *buf = _bell;
for (uint i = 0; i < BELL_WAVE_COUNT; ++i) {
for (uint j = 0; j < SAMPLE_DUP; ++j)
*buf++ = 0x00;
for (uint j = 0; j < SAMPLE_DUP; ++j)
*buf++ = 0xff;
}
_silence = new byte[SILENCE_LEN];
buf = _silence;
for (uint i = 0; i < SILENCE_LEN; ++i)
*buf++ = 0x80;
}
void Speaker::bell(uint count) {
Audio::QueuingAudioStream *stream = Audio::makeQueuingAudioStream(SAMPLE_RATE, false);
Audio::SoundHandle handle;
stream->queueBuffer(_bell, BELL_LEN, DisposeAfterUse::NO, Audio::FLAG_UNSIGNED);
for (uint i = 1; i < count; ++i) {
stream->queueBuffer(_silence, SILENCE_LEN, DisposeAfterUse::NO, Audio::FLAG_UNSIGNED);
stream->queueBuffer(_bell, BELL_LEN, DisposeAfterUse::NO, Audio::FLAG_UNSIGNED);
}
stream->finish();
g_system->getMixer()->playStream(Audio::Mixer::kPlainSoundType, &handle, stream);
while (!g_engine->shouldQuit() && g_system->getMixer()->isSoundHandleActive(handle)) {
Common::Event event;
static_cast<AdlEngine *>(g_engine)->pollEvent(event);
g_system->delayMillis(16);
}
}
} // End of namespace Adl
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