add some code

managed_components/espressif__esp-dsp/modules/windows/test/test_wind_f32.c

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+// 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 <string.h>
+#include "unity.h"
+#include "dsp_platform.h"
+#include "esp_log.h"
+
+#include "esp_dsp.h"
+#include "dsps_wind.h"
+
+static const int length = 1024;
+
+// This test check if the window is symmetric
+TEST_CASE("dsps_wind_hann_f32: test Hann window for symmetry", "[dsps]")
+{
+    float *data = (float *)malloc(length * sizeof(float));
+    dsps_wind_hann_f32(data, length);
+    float hann_diff = 0;
+    for (int i = 0 ; i < length / 2 ; i++) {
+        hann_diff += fabs(data[i] - data[length - 1 - i]);
+    }
+
+    if (hann_diff > 0) {
+        TEST_ASSERT_EQUAL(0, hann_diff);
+    }
+    dsps_view(data, length, 64, 10, 0, 1, '.');
+    free(data);
+}
+
+TEST_CASE("dsps_wind_blackman_f32: test Blackman window for symmetry", "[dsps]")
+{
+    float *data = (float *)malloc(length * sizeof(float));
+    dsps_wind_blackman_f32(data, length);
+    float hann_diff = 0;
+    for (int i = 0 ; i < length / 2 ; i++) {
+        hann_diff += fabs(data[i] - data[length - 1 - i]);
+    }
+    if (hann_diff > 0) {
+        TEST_ASSERT_EQUAL(0, hann_diff);
+    }
+    dsps_view(data, length, 64, 10, 0, 1, '.');
+    free(data);
+}
+
+TEST_CASE("dsps_wind_blackman_harris_f32: test Blackman-Hariss window for symmetry", "[dsps]")
+{
+    float *data = (float *)malloc(length * sizeof(float));
+    dsps_wind_blackman_harris_f32(data, length);
+    float hann_diff = 0;
+    for (int i = 0 ; i < length / 2 ; i++) {
+        hann_diff += fabs(data[i] - data[length - 1 - i]);
+    }
+
+    if (hann_diff > 0) {
+        TEST_ASSERT_EQUAL(0, hann_diff);
+    }
+    dsps_view(data, length, 64, 10, 0, 1, '.');
+    free(data);
+}
+
+TEST_CASE("dsps_wind_blackman_nuttall_f32: test Blackman-Nuttall window for symmetry", "[dsps]")
+{
+    float *data = (float *)malloc(length * sizeof(float));
+    dsps_wind_blackman_nuttall_f32(data, length);
+    float hann_diff = 0;
+    for (int i = 0 ; i < length / 2 ; i++) {
+        hann_diff += fabs(data[i] - data[length - 1 - i]);
+    }
+
+    if (hann_diff > 0) {
+        TEST_ASSERT_EQUAL(0, hann_diff);
+    }
+    dsps_view(data, length, 64, 10, 0, 1, '.');
+    free(data);
+}
+
+TEST_CASE("dsps_wind_nuttall_f32: test Nuttall window for symmetry", "[dsps]")
+{
+    float *data = (float *)malloc(length * sizeof(float));
+    dsps_wind_nuttall_f32(data, length);
+    float hann_diff = 0;
+    for (int i = 0 ; i < length / 2 ; i++) {
+        hann_diff += fabs(data[i] - data[length - 1 - i]);
+    }
+
+    if (hann_diff > 0) {
+        TEST_ASSERT_EQUAL(0, hann_diff);
+    }
+    dsps_view(data, length, 64, 10, 0, 1, '.');
+    free(data);
+}
+
+TEST_CASE("dsps_wind_flat_top_f32: test Flat-Top window for symmetry", "[dsps]")
+{
+    float *data = (float *)malloc(length * sizeof(float));
+    dsps_wind_flat_top_f32(data, length);
+    float hann_diff = 0;
+    for (int i = 0 ; i < length / 2 ; i++) {
+        hann_diff += fabs(data[i] - data[length - 1 - i]);
+    }
+
+    if (hann_diff > 0) {
+        TEST_ASSERT_EQUAL(0, hann_diff);
+    }
+    dsps_view(data, length, 64, 10, 0, 1, '.');
+    free(data);
+}