90 lines
2.5 KiB
C++
90 lines
2.5 KiB
C++
/* Created by Eric Fry
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* Copyright (C) 2011 The Nuvie Team
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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*/
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#include "ultima/nuvie/core/nuvie_defs.h"
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#include "ultima/nuvie/sound/adplug/opl_class.h"
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#include "ultima/nuvie/sound/origin_fx_adib_driver.h"
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#include "ultima/nuvie/conf/configuration.h"
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#include "ultima/nuvie/sound/decoder/adlib_sfx_stream.h"
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namespace Ultima {
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namespace Nuvie {
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AdLibSfxStream::AdLibSfxStream(const Configuration *cfg, int rate, uint8 channel, sint8 note, uint8 velocity, uint8 program_number, uint32 d) {
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interrupt_samples_left = 0;
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opl = new OplClass(rate, true, true); // 16bit stereo
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driver = new OriginFXAdLibDriver(cfg, opl);
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if (program_number != 0xff) {
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driver->program_change(channel, program_number);
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}
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driver->control_mode_change(channel, 0x7, 0x7f);
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driver->play_note(channel, note, velocity);
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duration = d;
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interrupt_rate = (int)(opl->getRate() / 60);
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total_samples_played = 0;
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}
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AdLibSfxStream::~AdLibSfxStream() {
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delete driver;
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delete opl;
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}
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int AdLibSfxStream::readBuffer(sint16 *buffer, const int numSamples) {
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//sint32 i, j;
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short *data = (short *)buffer;
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int len = numSamples / 2;
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total_samples_played += numSamples;
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if (interrupt_samples_left > 0) {
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if (interrupt_samples_left > len) {
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opl->update(data, len);
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interrupt_samples_left -= len;
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return numSamples;
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}
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opl->update(data, interrupt_samples_left);
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data += interrupt_samples_left * 2;
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len -= interrupt_samples_left;
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interrupt_samples_left = 0;
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}
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for (int i = len; i > 0;) {
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driver->interrupt_vector();
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int j = interrupt_rate;
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if (j > i) {
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interrupt_samples_left = j - i;
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j = i;
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}
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opl->update(data, j);
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data += j * 2;
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i -= j;
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}
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//driver->play_note(8, 0x40, 0);
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return numSamples;
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}
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} // End of namespace Nuvie
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} // End of namespace Ultima
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