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looping_delay.h
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looping_delay.h
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/*
* looping_delay.h
*
* Author: Dan Green ([email protected])
*
* 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 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.
*
* See http://creativecommons.org/licenses/MIT/ for more information.
*
* -----------------------------------------------------------------------------
*/
#ifndef __audio__
#define __audio__
//#define ARM_MATH_CM4
#include <stm32f4xx.h>
#include "sdram.h"
#define LOOP_SIZE (SDRAM_SIZE/2)
void audio_buffer_init(void);
void process_audio_block_codec(int16_t *src, int16_t *dst, int16_t sz, uint8_t channel);
void update_write_time(uint8_t channel);
void set_divmult_time(uint8_t channel);
void swap_read_write(uint8_t channel);
uint32_t inc_addr(uint32_t addr, uint8_t channel);
uint32_t dec_addr(uint32_t addr, uint8_t channel);
uint32_t offset_samples(uint8_t channel, uint32_t base_addr, uint32_t offset, uint8_t subtract);
uint32_t calculate_read_addr(uint8_t channel, uint32_t new_divmult_time);
void scroll_loop(uint8_t channel, float scroll_amount, uint8_t scroll_subtract);
void change_inf_mode(uint8_t channel);
void reverse_loop(uint8_t channel);
#endif