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76 lines
2.4 KiB
76 lines
2.4 KiB
/*
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Arduino SID
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Copyright (c) 2015 Frank Bösing
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This library 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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This library 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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You should have received a copy of the GNU General Public License
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along with this library. If not, see <http://www.gnu.org/licenses/>.
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Diese Bibliothek ist freie Software: Sie können es unter den Bedingungen
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der GNU General Public License, wie von der Free Software Foundation,
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Version 3 der Lizenz oder (nach Ihrer Wahl) jeder neueren
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veröffentlichten Version, weiterverbreiten und/oder modifizieren.
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Diese Bibliothek wird in der Hoffnung, dass es nützlich sein wird, aber
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OHNE JEDE GEWÄHRLEISTUNG, bereitgestellt; sogar ohne die implizite
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Gewährleistung der MARKTFÄHIGKEIT oder EIGNUNG FÜR EINEN BESTIMMTEN ZWECK.
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Siehe die GNU General Public License für weitere Details.
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Sie sollten eine Kopie der GNU General Public License zusammen mit diesem
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Programm erhalten haben. Wenn nicht, siehe <http://www.gnu.org/licenses/>.
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*/
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#include "reSID.h"
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#include <AudioStream.h>
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#define SAMPLERATE AUDIO_SAMPLE_RATE_EXACT
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#define CLOCKFREQ 985248
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void AudioPlaySID::begin(void)
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{
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sidptr = &sid;
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this->reset();
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setSampleParameters(CLOCKFREQ, SAMPLERATE);
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playing = true;
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}
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void AudioPlaySID::setSampleParameters(float clockfreq, float samplerate) {
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sid.set_sampling_parameters(clockfreq, SAMPLE_FAST, samplerate);
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csdelta = round((float)clockfreq / ((float)samplerate / AUDIO_BLOCK_SAMPLES));
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}
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void AudioPlaySID::reset(void)
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{
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sid.reset();
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}
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void AudioPlaySID::stop(void)
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{
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__disable_irq();
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playing = false;
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__enable_irq();
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}
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void AudioPlaySID::update(void) {
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audio_block_t *block;
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// only update if we're playing
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if (!playing) return;
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// allocate the audio blocks to transmit
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block = allocate();
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if (block == NULL) return;
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//cycle_count delta_t = CLOCKFREQ / (SAMPLERATE / AUDIO_BLOCK_SAMPLES);
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cycle_count delta_t = csdelta;
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sidptr->clock(delta_t, (short int*)block->data, AUDIO_BLOCK_SAMPLES);
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transmit(block);
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release(block);
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}
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