Add Chromium-only Blender WebEngine parity work

blender-5.2.0/extern/audaspace/src/util/FFTPlan.cpp

@@ -0,0 +1,66 @@
+/*******************************************************************************
+* Copyright 2015-2016 Juan Francisco Crespo Galán
+*
+* 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 "util/FFTPlan.h"
+
+AUD_NAMESPACE_BEGIN
+FFTPlan::FFTPlan(double measureTime) :
+	FFTPlan(DEFAULT_N, measureTime)
+{
+}
+
+FFTPlan::FFTPlan(int n, double measureTime) :
+	m_N(n), m_bufferSize(((n/2)+1)*2*sizeof(fftwf_complex))
+{
+	fftwf_set_timelimit(measureTime);
+	void* buf = fftwf_malloc(m_bufferSize);
+	m_fftPlanR2C = fftwf_plan_dft_r2c_1d(m_N, (float*)buf, (fftwf_complex*)buf, FFTW_EXHAUSTIVE);
+	m_fftPlanC2R = fftwf_plan_dft_c2r_1d(m_N, (fftwf_complex*)buf, (float*)buf, FFTW_EXHAUSTIVE);
+	fftwf_free(buf);
+}
+
+FFTPlan::~FFTPlan()
+{
+	fftwf_destroy_plan(m_fftPlanC2R);
+	fftwf_destroy_plan(m_fftPlanR2C);
+}
+
+int FFTPlan::getSize()
+{
+	return m_N;
+}
+
+void FFTPlan::FFT(void* buffer)
+{
+	fftwf_execute_dft_r2c(m_fftPlanR2C, (float*)buffer, (fftwf_complex*)buffer);
+}
+
+void FFTPlan::IFFT(void* buffer)
+{
+	fftwf_execute_dft_c2r(m_fftPlanC2R, (fftwf_complex*)buffer, (float*)buffer);
+}
+
+void* FFTPlan::getBuffer()
+{
+	return fftwf_malloc(m_bufferSize);
+}
+
+void FFTPlan::freeBuffer(void* buffer)
+{
+	fftwf_free(buffer);
+}
+
+AUD_NAMESPACE_END