Sine_f32.h

00001 /* mbed Microcontroller Library
00002  * Copyright (c) 2006-2012 ARM Limited
00003  *
00004  * Permission is hereby granted, free of charge, to any person obtaining a copy
00005  * of this software and associated documentation files (the "Software"), to deal
00006  * in the Software without restriction, including without limitation the rights
00007  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
00008  * copies of the Software, and to permit persons to whom the Software is
00009  * furnished to do so, subject to the following conditions:
00010  *
00011  * The above copyright notice and this permission notice shall be included in
00012  * all copies or substantial portions of the Software.
00013  *
00014  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
00015  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
00016  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
00017  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
00018  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
00019  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
00020  * SOFTWARE.
00021  */
00022 #ifndef SINE_F32_H
00023 #define SINE_F32_H 
00024 
00025 #include <stdint.h>
00026 #include "arm_math.h"
00027 
00028 namespace dsp {
00029 
00030 class Sine_f32 {
00031 public:
00032     Sine_f32(uint32_t frequency, uint32_t sample_rate=48000, float32_t amplitude=1.f, float32_t phase=0.0, uint32_t block_size=32);
00033     
00034     void process(float32_t *sgn_in, float32_t *sgn_out);
00035     
00036     void generate(float32_t *sgn);
00037     
00038     void reset(void);
00039 
00040 private:
00041     float32_t _dx;
00042     float32_t _amplitude;
00043     float32_t _x;
00044     uint32_t _block_size;
00045 };
00046 
00047 }
00048 #endif