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
64 lines
2.1 KiB
C
64 lines
2.1 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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#include <string.h>
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#include "unity.h"
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#include "dsp_platform.h"
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#include "esp_log.h"
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#include "dsps_tone_gen.h"
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#include "dsps_d_gen.h"
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#include "dsps_biquad_gen.h"
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#include "dsps_biquad.h"
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static const char *TAG = "dsps_biquad_f32_ansi";
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float x[1024];
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float y[1024];
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TEST_CASE("dsps_biquad_f32_ansi functionality", "[dsps]")
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{
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// In the test we generate filter with cutt off frequency 0.1
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// and then filtering 0.1 and 0.3 frequencis.
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// Result must be better then 24 dB
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int len = sizeof(x) / sizeof(float);
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dsps_tone_gen_f32(x, len, 1, 0.1, 0);
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float coeffs[5];
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float w1[2] = {0};
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float w2[2] = {0};
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dsps_biquad_gen_lpf_f32(coeffs, 0.1, 1);
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dsps_biquad_f32_ansi(x, y, len, coeffs, w1);
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float pow_band = 0;
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for (int i = len / 2 ; i < len ; i++) {
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pow_band += y[i] * y[i];
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}
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float pow_out_band = 0;
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dsps_tone_gen_f32(x, len, 1, 0.3, 0);
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dsps_biquad_f32_ansi(x, y, len, coeffs, w2);
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for (int i = len / 2 ; i < len ; i++) {
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pow_out_band += y[i] * y[i];
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}
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pow_band = 2 * pow_band / (float)len;
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pow_out_band = 2 * pow_out_band / (float)len;
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float diff_db = -10 * log10f(0.000000001 + pow_out_band / pow_band);
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ESP_LOGI(TAG, "Power: pass =%f, stop= %f, diff = %f dB", pow_band, pow_out_band, diff_db);
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if (diff_db < 24) {
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ESP_LOGE(TAG, "Attenuation for LPF must be not less then 24! Now it is: %f", diff_db);
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TEST_ASSERT_MESSAGE (false, "LPF attenuation is less then expected");
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}
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}
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