ex_sqrfft.c

/* 
// Copyright 2017 Intel Corporation All Rights Reserved.
// 
// The source code, information and material ("Material") contained herein is
// owned by Intel Corporation or its suppliers or licensors, and title
// to such Material remains with Intel Corporation or its suppliers or
// licensors. The Material contains proprietary information of Intel
// or its suppliers and licensors. The Material is protected by worldwide
// copyright laws and treaty provisions. No part of the Material may be used,
// copied, reproduced, modified, published, uploaded, posted, transmitted,
// distributed or disclosed in any way without Intel's prior express written
// permission. No license under any patent, copyright or other intellectual
// property rights in the Material is granted to or conferred upon you,
// either expressly, by implication, inducement, estoppel or otherwise.
// Any license under such intellectual property rights must be express and
// approved by Intel in writing.
// 
// Unless otherwise agreed by Intel in writing,
// you may not remove or alter this notice or any other notice embedded in
// Materials by Intel or Intel's suppliers or licensors in any way.
// 
*/

#include "ippsq.h"
#include "examples_doc_sq.h"

#define VLENGTH 8

int main(void)
{
    IppsqFFTSpec_16s spec;
    IppStatus   status;
    Ipp16s      src[VLENGTH] = { 16000, 0, -16000, 0, 16000, 0, -16000, 0 };
    Ipp16s      spectrum[VLENGTH + 2];
    Ipp8u       buffer[sizeof(Ipp16s) * VLENGTH / 4];

    printf_v16s("src =\n", " %d", src, VLENGTH);
    CHECK_STS( status = ippsqFFTInit_16s(&spec, VLENGTH, buffer) )
    printf_v16s("buffer sin(0-PI/4] =\n", " %d", (Ipp16s*)buffer, spec.fftLen / 4);
    QM_PRINTF("real fft length = %d\n", VLENGTH);

    CHECK_STS( status = ippsqFFTFwd_RToCCS_16s(src, spectrum, 1, &spec) )

    printf_v16s("spectrum = \n", " %d", spectrum, VLENGTH + 2);

EXIT_MAIN
    CONTROL_RETURN;
}
For more complete information about compiler optimizations, see our Optimization Notice.