43 lines
1.2 KiB
C
43 lines
1.2 KiB
C
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/*
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* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "common_audio/signal_processing/include/real_fft.h"
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#include <stdlib.h>
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#include "common_audio/signal_processing/include/signal_processing_library.h"
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struct RealFFT {
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int order;
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};
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struct RealFFT* WebRtcSpl_CreateRealFFT(int order) {
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struct RealFFT* self = NULL;
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// This constraint comes from ComplexFFT().
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if (order > 10 || order < 0) {
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return NULL;
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}
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self = malloc(sizeof(struct RealFFT));
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self->order = order;
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return self;
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}
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void WebRtcSpl_FreeRealFFT(struct RealFFT* self) {
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free(self);
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}
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int WebRtcSpl_RealForwardFFT(struct RealFFT* self, int16_t* data) {
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return WebRtcSpl_ComplexFFT(data, self->order, 1);
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}
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int WebRtcSpl_RealInverseFFT(struct RealFFT* self, int16_t* data) {
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return WebRtcSpl_ComplexIFFT(data, self->order, 1);
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}
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