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/*
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Copyright (c) 2019, Holger Wirtz |
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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 and this permission notice shall be included in |
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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 <Audio.h> |
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#include "mono2stereo.h" |
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/*************************************************************************/ |
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// A u d i o E f f e c t M o n o 2 S t e r e o
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// Written by Holger Wirtz
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// 20191122 - inital version
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void Mono2Stereo::update(void) |
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{ |
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audio_block_t *in; |
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audio_block_t *out[2]; |
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in = receiveReadOnly(0); |
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out[0] = allocate(); |
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out[1] = allocate(); |
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if (in && out[0] && out[1]) |
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{ |
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int16_t *ip = in->data; |
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int16_t *op[2] = { out[0]->data, out[1]->data }; |
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float f_l = _pseudo_log * sinf(_pan * PI / 2); // _Pan [L0.0 ... M0.5 ... 1.0R]
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float f_r = _pseudo_log * cosf(_pan * PI / 2); |
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for (uint16_t i = 0; i < AUDIO_BLOCK_SAMPLES; i++) |
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{ |
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*op[0] = int16_t(f_l * (*ip)); |
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*op[1] = int16_t(f_r * (*ip++)); |
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op[0]++; |
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op[1]++; |
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} |
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if (in) |
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{ |
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release(in); |
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} |
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for (uint8_t i = 0; i < 2; i++) |
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{ |
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if (out[i]) |
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{ |
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transmit(out[i], i); |
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release(out[i]); |
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} |
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} |
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} |
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} |
@ -0,0 +1,52 @@ |
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/*
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Copyright (c) 2019, Holger Wirtz |
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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 |
||||
furnished to do so, subject to the following conditions: |
||||
|
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The above copyright notice and this permission notice shall be included in |
||||
all copies or substantial portions of the Software. |
||||
|
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
||||
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
||||
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
||||
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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#ifndef mono2stereo_h_ |
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#define mono2stereo_h_ |
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#include "Arduino.h" |
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#include "AudioStream.h" |
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/*************************************************************************/ |
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// A u d i o E f f e c t M o n o 2 S t e r e o
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// Written by Holger Wirtz
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// 20191122 - inital version
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class Mono2Stereo : public AudioStream |
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{ |
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public: |
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Mono2Stereo(void): |
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AudioStream(1, inputQueueArray) |
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{ |
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_pan = 0.5; |
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} |
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virtual void update(void); |
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private: |
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audio_block_t *inputQueueArray[4]; |
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audio_block_t *out[2]; |
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const float _pseudo_log = 1048575 / (float)(1 << 20); |
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float _pan; |
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}; |
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#endif |
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