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
48 lines
1.3 KiB
C
48 lines
1.3 KiB
C
// Copyright 2018-2019 Espressif Systems (Shanghai) PTE LTD
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
#ifndef _dsps_tone_gen_H_
|
|
#define _dsps_tone_gen_H_
|
|
#include "dsp_err.h"
|
|
|
|
|
|
#ifdef __cplusplus
|
|
extern "C"
|
|
{
|
|
#endif
|
|
|
|
/**
|
|
* @brief tone
|
|
*
|
|
* The function generate a tone signal.
|
|
* x[i]=A*sin(2*PI*i + ph/180*PI)
|
|
* The implementation use ANSI C and could be compiled and run on any platform
|
|
*
|
|
* @param output: output array.
|
|
* @param len: length of the input signal
|
|
* @param Ampl: amplitude
|
|
* @param freq: Naiquist frequency -1..1
|
|
* @param phase: phase in degree
|
|
*
|
|
* @return
|
|
* - ESP_OK on success
|
|
* - One of the error codes from DSP library
|
|
*/
|
|
esp_err_t dsps_tone_gen_f32(float *output, int len, float Ampl, float freq, float phase);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif // _dsps_tone_gen_H_
|