91 lines
3 KiB
C++
91 lines
3 KiB
C++
/* Audio Library for Teensy 3.X
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* Copyright (c) 2014, Paul Stoffregen, paul@pjrc.com
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*
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* Development of this audio library was funded by PJRC.COM, LLC by sales of
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* Teensy and Audio Adaptor boards. Please support PJRC's efforts to develop
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* open source software by purchasing Teensy or other PJRC products.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice, development funding notice, and this permission
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* notice shall be included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <Arduino.h>
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#include "effect_multiply.h"
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void AudioEffectMultiply::update(void)
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{
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#if defined(__ARM_ARCH_7EM__)
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audio_block_t *blocka, *blockb;
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uint32_t *pa, *pb, *end;
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uint32_t a12, a34; //, a56, a78;
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uint32_t b12, b34; //, b56, b78;
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blocka = receiveWritable(0);
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blockb = receiveReadOnly(1);
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if (!blocka) {
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if (blockb) release(blockb);
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return;
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}
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if (!blockb) {
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release(blocka);
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return;
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}
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pa = (uint32_t *)(blocka->data);
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pb = (uint32_t *)(blockb->data);
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end = pa + AUDIO_BLOCK_SAMPLES/2;
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while (pa < end) {
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a12 = *pa;
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a34 = *(pa+1);
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//a56 = *(pa+2); // 8 samples/loop should work, but crashes.
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//a78 = *(pa+3); // why?! maybe a compiler bug??
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b12 = *pb++;
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b34 = *pb++;
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//b56 = *pb++;
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//b78 = *pb++;
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a12 = pack_16b_16b(
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signed_saturate_rshift(multiply_16tx16t(a12, b12), 16, 15),
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signed_saturate_rshift(multiply_16bx16b(a12, b12), 16, 15));
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a34 = pack_16b_16b(
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signed_saturate_rshift(multiply_16tx16t(a34, b34), 16, 15),
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signed_saturate_rshift(multiply_16bx16b(a34, b34), 16, 15));
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//a56 = pack_16b_16b(
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// signed_saturate_rshift(multiply_16tx16t(a56, b56), 16, 15),
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// signed_saturate_rshift(multiply_16bx16b(a56, b56), 16, 15));
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//a78 = pack_16b_16b(
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// signed_saturate_rshift(multiply_16tx16t(a78, b78), 16, 15),
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// signed_saturate_rshift(multiply_16bx16b(a78, b78), 16, 15));
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*pa++ = a12;
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*pa++ = a34;
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//*pa++ = a56;
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//*pa++ = a78;
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}
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transmit(blocka);
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release(blocka);
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release(blockb);
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#elif defined(KINETISL)
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audio_block_t *block;
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block = receiveReadOnly(0);
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if (block) release(block);
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block = receiveReadOnly(1);
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if (block) release(block);
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#endif
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}
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