/* Audio Library for Teensy 3.X
* Copyright ( c ) 2014 , Paul Stoffregen , paul @ pjrc . com
*
* Development of this audio library was funded by PJRC . COM , LLC by sales of
* Teensy and Audio Adaptor boards . Please support PJRC ' s efforts to develop
* open source software by purchasing Teensy or other PJRC products .
*
* Permission is hereby granted , free of charge , to any person obtaining a copy
* of this software and associated documentation files ( the " Software " ) , to deal
* in the Software without restriction , including without limitation the rights
* to use , copy , modify , merge , publish , distribute , sublicense , and / or sell
* copies of the Software , and to permit persons to whom the Software is
* furnished to do so , subject to the following conditions :
*
* The above copyright notice , development funding notice , and this permission
* notice shall be included in all copies or substantial portions of the Software .
*
* 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
* LIABILITY , WHETHER IN AN ACTION OF CONTRACT , TORT OR OTHERWISE , ARISING FROM ,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE .
*/
# ifndef mixer8_h_
# define mixer8_h_
# include "Arduino.h"
# include "AudioStream.h"
class AudioMixer8 : public AudioStream
{
# if defined(__ARM_ARCH_7EM__)
public :
AudioMixer8 ( void ) : AudioStream ( 8 , inputQueueArray ) {
for ( int i = 0 ; i < 8 ; i + + ) multiplier [ i ] = 65536 ;
}
virtual void update ( void ) ;
void gain ( unsigned int channel , float gain ) {
if ( channel > = 8 ) return ;
if ( gain > 32767.0f ) gain = 32767.0f ;
else if ( gain < - 32767.0f ) gain = - 32767.0f ;
multiplier [ channel ] = gain * 65536.0f ; // TODO: proper roundoff?
}
private :
int32_t multiplier [ 8 ] ;
audio_block_t * inputQueueArray [ 8 ] ;
# elif defined(KINETISL)
public :
AudioMixer8 ( void ) : AudioStream ( 8 , inputQueueArray ) {
for ( int i = 0 ; i < 8 ; i + + ) multiplier [ i ] = 256 ;
}
virtual void update ( void ) ;
void gain ( unsigned int channel , float gain ) {
if ( channel > = 8 ) return ;
if ( gain > 127.0f ) gain = 127.0f ;
else if ( gain < - 127.0f ) gain = - 127.0f ;
multiplier [ channel ] = gain * 256.0f ; // TODO: proper roundoff?
}
private :
int16_t multiplier [ 8 ] ;
audio_block_t * inputQueueArray [ 8 ] ;
# endif
} ;
# endif
