15b4baba28
- minimize RAM usage of all components - use both IRAM and DRAM in player component so we can buffer up to 1s on modules without SPI RAM - support fragemented pcm chunks so we can use all available RAM if there isn't a big enough block available but still enough HEAP - reinclude all components from jorgen's master branch - add custom i2s driver to get a precise timing of initial sync - change wrong usage of esp_timer for latency measurement of snapcast protocol - add player component
91 lines
2.3 KiB
C
91 lines
2.3 KiB
C
// Copyright 2018-2019 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef _dsps_sqrt_H_
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#define _dsps_sqrt_H_
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#include "dsp_err.h"
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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/**@{*/
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/**
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* @brief square root approximation
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*
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* The function takes square root approximation
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* x[i] ~ sqrt(y[i]); i=[0..len)
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* The implementation use ANSI C and could be compiled and run on any platform
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*
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* @param[in] input: input array
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* @param output: output array
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* @param len: amount of operations for arrays
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*
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* @return
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* - ESP_OK on success
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* - One of the error codes from DSP library
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*/
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esp_err_t dsps_sqrt_f32_ansi(const float *input, float *output, int len);
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//esp_err_t dsps_sqrt_s32_ansi(const int32_t *input, int16_t *output, int len);
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/**@{*/
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/**
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* @brief square root approximation
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*
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* The function takes square root approximation
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* x ~ sqrt(y);
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* The implementation use ANSI C and could be compiled and run on any platform
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*
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* @param[in] data: input value
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*
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* @return
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* - square root value
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*/
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float dsps_sqrtf_f32_ansi(const float data);
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/**@{*/
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/**
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* @brief inverted square root approximation
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*
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* The function takes inverted square root approximation
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* x ~ 1/sqrt(y);
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* The implementation use ANSI C and could be compiled and run on any platform
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*
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* @param[in] data: input value
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*
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* @return
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* - inverted square root value
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*/
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float dsps_inverted_sqrtf_f32_ansi(float data );
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/**@}*/
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#ifdef __cplusplus
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}
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#endif
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#ifdef CONFIG_DSP_OPTIMIZED
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#define dsps_sqrt_f32 dsps_sqrt_f32_ansi
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#define dsps_sqrtf_f32 dsps_sqrtf_f32_ansi
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#define dsps_inverted_sqrtf_f32 dsps_inverted_sqrtf_f32_ansi
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#else
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#define dsps_sqrt_f32 dsps_sqrt_f32_ansi
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#define dsps_sqrtf_f32 dsps_sqrtf_f32_ansi
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#define dsps_inverted_sqrtf_f32 dsps_inverted_sqrtf_f32_ansi
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#endif
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#endif // _dsps_sqrt_H_
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