add some code

managed_components/espressif__esp-dsp/modules/windows/blackman/float/dsps_wind_blackman_f32.c

@@ -0,0 +1,29 @@
+// 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.
+
+#define _USE_MATH_DEFINES
+#include "dsps_wind_blackman.h"
+#include <math.h>
+
+void dsps_wind_blackman_f32(float *window, int len)
+{
+    const float a0 = 0.42;
+    const float a1 = 0.5;
+    const float a2 = 0.08;
+
+    float len_mult = 1 / (float)(len - 1);
+    for (int i = 0; i < len; i++) {
+        window[i] = a0 - a1 * cosf(i * 2 * M_PI * len_mult) + a2 * cosf(i * 4 * M_PI * len_mult);
+    }
+}

managed_components/espressif__esp-dsp/modules/windows/blackman/include/dsps_wind_blackman.h

@@ -0,0 +1,38 @@
+// 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_wind_blackman_H_
+#define _dsps_wind_blackman_H_
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+/**
+ * @brief   Blackman window
+ *
+ * The function generates Blackman window for plpha = 0.16.
+ *
+ * @param window: buffer to store window array.
+ * @param len: length of the window array
+ *
+ */
+void dsps_wind_blackman_f32(float *window, int len);
+
+#ifdef __cplusplus
+}
+#endif
+#endif // _dsps_wind_blackman_H_

managed_components/espressif__esp-dsp/modules/windows/blackman_harris/float/dsps_wind_blackman_harris_f32.c

@@ -0,0 +1,33 @@
+// 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.
+
+#define _USE_MATH_DEFINES
+#include "dsps_wind_blackman_harris.h"
+#include <math.h>
+
+void dsps_wind_blackman_harris_f32(float *window, int len)
+{
+    const float a0 = 0.35875;
+    const float a1 = 0.48829;
+    const float a2 = 0.14128;
+    const float a3 = 0.01168;
+
+    float len_mult = 1 / (float)(len - 1);
+    for (int i = 0; i < len; i++) {
+        window[i] = a0
+                    - a1 * cosf(i * 2 * M_PI * len_mult)
+                    + a2 * cosf(i * 4 * M_PI * len_mult)
+                    - a3 * cosf(i * 6 * M_PI * len_mult);
+    }
+}

managed_components/espressif__esp-dsp/modules/windows/blackman_harris/include/dsps_wind_blackman_harris.h

@@ -0,0 +1,38 @@
+// 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_wind_blackman_harris_H_
+#define _dsps_wind_blackman_harris_H_
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+/**
+ * @brief   Blackman-Harris window
+ *
+ * The function generates Blackman-Harris window.
+ *
+ * @param window: buffer to store window array.
+ * @param len: length of the window array
+ *
+ */
+void dsps_wind_blackman_harris_f32(float *window, int len);
+
+#ifdef __cplusplus
+}
+#endif
+#endif // _dsps_wind_blackman_harris_H_

managed_components/espressif__esp-dsp/modules/windows/blackman_nuttall/float/dsps_wind_blackman_nuttall_f32.c

@@ -0,0 +1,33 @@
+// 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.
+
+#define _USE_MATH_DEFINES
+#include "dsps_wind_blackman_nuttall.h"
+#include <math.h>
+
+void dsps_wind_blackman_nuttall_f32(float *window, int len)
+{
+    const float a0 = 0.3635819;
+    const float a1 = 0.4891775;
+    const float a2 = 0.1365995;
+    const float a3 = 0.0106411;
+
+    float len_mult = 1 / (float)(len - 1);
+    for (int i = 0; i < len; i++) {
+        window[i] = a0
+                    - a1 * cosf(i * 2 * M_PI * len_mult)
+                    + a2 * cosf(i * 4 * M_PI * len_mult)
+                    - a3 * cosf(i * 6 * M_PI * len_mult);
+    }
+}

managed_components/espressif__esp-dsp/modules/windows/blackman_nuttall/include/dsps_wind_blackman_nuttall.h

@@ -0,0 +1,38 @@
+// 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_wind_blackman_nuttall_H_
+#define _dsps_wind_blackman_nuttall_H_
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+/**
+ * @brief   Blackman-Nuttall window
+ *
+ * The function generates Blackman-Nuttall window.
+ *
+ * @param window: buffer to store window array.
+ * @param len: length of the window array
+ *
+ */
+void dsps_wind_blackman_nuttall_f32(float *window, int len);
+
+#ifdef __cplusplus
+}
+#endif
+#endif // _dsps_wind_blackman_nuttall_H_

managed_components/espressif__esp-dsp/modules/windows/flat_top/float/dsps_wind_flat_top_f32.c

@@ -0,0 +1,35 @@
+// 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.
+
+#define _USE_MATH_DEFINES
+#include "dsps_wind_flat_top.h"
+#include <math.h>
+
+void dsps_wind_flat_top_f32(float *window, int len)
+{
+    const float a0 = 0.21557895;
+    const float a1 = 0.41663158;
+    const float a2 = 0.277263158;
+    const float a3 = 0.083578947;
+    const float a4 = 0.006947368;
+
+    float len_mult = 1 / (float)(len - 1);
+    for (int i = 0; i < len; i++) {
+        window[i] = a0
+                    - a1 * cosf(i * 2 * M_PI * len_mult)
+                    + a2 * cosf(i * 4 * M_PI * len_mult)
+                    - a3 * cosf(i * 6 * M_PI * len_mult)
+                    + a4 * cosf(i * 8 * M_PI * len_mult);
+    }
+}

managed_components/espressif__esp-dsp/modules/windows/flat_top/include/dsps_wind_flat_top.h

@@ -0,0 +1,38 @@
+// 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_wind_flat_top_H_
+#define _dsps_wind_flat_top_H_
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+/**
+ * @brief   Flat-Top window
+ *
+ * The function generates Flat-Top window.
+ *
+ * @param window: buffer to store window array.
+ * @param len: length of the window array
+ *
+ */
+void dsps_wind_flat_top_f32(float *window, int len);
+
+#ifdef __cplusplus
+}
+#endif
+#endif // _dsps_wind_flat_top_H_

managed_components/espressif__esp-dsp/modules/windows/hann/float/dsps_wind_hann_f32.c

@@ -0,0 +1,25 @@
+// 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.
+
+#define _USE_MATH_DEFINES
+#include "dsps_wind_hann.h"
+#include <math.h>
+
+void dsps_wind_hann_f32(float *window, int len)
+{
+    float len_mult = 1 / (float)(len - 1);
+    for (int i = 0; i < len; i++) {
+        window[i] = 0.5 * (1 - cosf(i * 2 * M_PI * len_mult));
+    }
+}

managed_components/espressif__esp-dsp/modules/windows/hann/include/dsps_wind_hann.h

@@ -0,0 +1,38 @@
+// 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_wind_hann_H_
+#define _dsps_wind_hann_H_
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+/**
+ * @brief   Hann window
+ *
+ * The function generates Hann window.
+ *
+ * @param window: buffer to store window array.
+ * @param len: length of the window array
+ *
+ */
+void dsps_wind_hann_f32(float *window, int len);
+
+#ifdef __cplusplus
+}
+#endif
+#endif // _dsps_wind_hann_H_

managed_components/espressif__esp-dsp/modules/windows/include/dsps_wind.h

@@ -0,0 +1,26 @@
+// 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_wind_H_
+#define _dsps_wind_H_
+
+#include "dsps_wind_hann.h"
+#include "dsps_wind_blackman.h"
+#include "dsps_wind_blackman_harris.h"
+#include "dsps_wind_blackman_nuttall.h"
+#include "dsps_wind_nuttall.h"
+#include "dsps_wind_flat_top.h"
+
+#endif // _dsps_wind_H_

managed_components/espressif__esp-dsp/modules/windows/nuttall/float/dsps_wind_nuttall_f32.c

@@ -0,0 +1,33 @@
+// 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.
+
+#define _USE_MATH_DEFINES
+#include "dsps_wind_nuttall.h"
+#include <math.h>
+
+void dsps_wind_nuttall_f32(float *window, int len)
+{
+    const float a0 = 0.355768;
+    const float a1 = 0.487396;
+    const float a2 = 0.144232;
+    const float a3 = 0.012604;
+
+    float len_mult = 1 / (float)(len - 1);
+    for (int i = 0; i < len; i++) {
+        window[i] = a0
+                    - a1 * cosf(i * 2 * M_PI * len_mult)
+                    + a2 * cosf(i * 4 * M_PI * len_mult)
+                    - a3 * cosf(i * 6 * M_PI * len_mult);
+    }
+}

managed_components/espressif__esp-dsp/modules/windows/nuttall/include/dsps_wind_nuttall.h

@@ -0,0 +1,38 @@
+// 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_wind_nuttall_H_
+#define _dsps_wind_nuttall_H_
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+/**
+ * @brief   Nuttall window
+ *
+ * The function generates Nuttall window.
+ *
+ * @param window: buffer to store window array.
+ * @param len: length of the window array
+ *
+ */
+void dsps_wind_nuttall_f32(float *window, int len);
+
+#ifdef __cplusplus
+}
+#endif
+#endif // _dsps_wind_nuttall_H_

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

@@ -0,0 +1,119 @@
+// 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);
+}