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
35 lines
1.0 KiB
C
35 lines
1.0 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.
|
|
|
|
#include "dsps_fir.h"
|
|
|
|
|
|
esp_err_t dsps_fird_init_f32(fir_f32_t *fir, float *coeffs, float *delay, int N, int decim, int start_pos)
|
|
{
|
|
fir->coeffs = coeffs;
|
|
fir->delay = delay;
|
|
fir->N = N;
|
|
fir->pos = 0;
|
|
fir->decim = decim;
|
|
fir->d_pos = start_pos;
|
|
if (fir->d_pos >= fir->decim) {
|
|
return ESP_ERR_DSP_PARAM_OUTOFRANGE;
|
|
}
|
|
|
|
for (int i = 0 ; i < N; i++) {
|
|
fir->delay[i] = 0;
|
|
}
|
|
return ESP_OK;
|
|
}
|