blob: 72ef96c405fe0ed043cd9571ad560bf756edf0b5 [file] [log] [blame]
/*
* Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <unistd.h>
#include "dl/sp/api/armSP.h"
#include "dl/sp/api/omxSP.h"
#include "dl/sp/src/test/aligned_ptr.h"
#include "dl/sp/src/test/compare.h"
#include "dl/sp/src/test/gensig.h"
#include "dl/sp/src/test/test_util.h"
#define MAX_FFT_ORDER 12
int verbose;
int signal_value;
void TestFFT(int fft_log_size, int sigtype, int scale_factor);
void main(int argc, char* argv[]) {
struct Options options;
SetDefaultOptions(&options, 0, MAX_FFT_ORDER);
ProcessCommandLine(&options, argc, argv,
"Test forward and inverse 32-bit fixed-point FFT\n");
verbose = options.verbose_;
signal_value = options.signal_value_;
if (verbose > 255)
DumpOptions(stderr, &options);
if (options.test_mode_) {
struct TestInfo info;
info.real_only_ = options.real_only_;
info.max_fft_order_ = options.max_fft_order_;
info.min_fft_order_ = options.min_fft_order_;
info.do_forward_tests_ = options.do_forward_tests_;
info.do_inverse_tests_ = options.do_inverse_tests_;
info.known_failures_ = 0;
/*
* These threshold values assume that we're using the default
* signal_value set below.
*/
info.forward_threshold_ = 107.33;
info.inverse_threshold_ = 79.02;
if (!options.signal_value_given_) {
signal_value = 262144; /* 18 bits */
}
RunAllTests(&info);
} else {
TestFFT(options.fft_log_size_,
options.signal_type_,
options.scale_factor_);
}
}
void GenerateSignal(OMX_SC32* x, OMX_SC32* fft, int size, int signal_type) {
int k;
struct ComplexFloat *test_signal;
struct ComplexFloat *true_fft;
test_signal = (struct ComplexFloat*) malloc(sizeof(*test_signal) * size);
true_fft = (struct ComplexFloat*) malloc(sizeof(*true_fft) * size);
GenerateTestSignalAndFFT(test_signal, true_fft, size, signal_type,
signal_value, 0);
/*
* Convert the complex float result to SC32 format. Just round.
* No error-checking here!
*/
for (k = 0; k < size; ++k) {
x[k].Re = 0.5 + test_signal[k].Re;
x[k].Im = 0.5 + test_signal[k].Im;
fft[k].Re = 0.5 + true_fft[k].Re;
fft[k].Im = 0.5 + true_fft[k].Im;
}
free(test_signal);
free(true_fft);
}
void DumpFFTSpec(OMXFFTSpec_C_SC32* pSpec) {
ARMsFFTSpec_SC32* p = (ARMsFFTSpec_SC32*) pSpec;
printf(" N = %d\n", p->N);
printf(" pBitRev = %p\n", p->pBitRev);
printf(" pTwiddle = %p\n", p->pTwiddle);
printf(" pBuf = %p\n", p->pBuf);
}
/*
* Compute forward and inverse FFT for one test case and compare the
* result with the expected result.
*/
void TestFFT(int fft_log_size, int signal_type, int scale_factor) {
struct SnrResult snr;
RunOneForwardTest(fft_log_size, signal_type, signal_value, &snr);
printf("Forward float FFT\n");
printf("SNR: real part %f dB\n", snr.real_snr_);
printf(" imag part %f dB\n", snr.imag_snr_);
printf(" complex part %f dB\n", snr.complex_snr_);
RunOneInverseTest(fft_log_size, signal_type, signal_value, &snr);
printf("Inverse float FFT\n");
printf("SNR: real part %f dB\n", snr.real_snr_);
printf(" imag part %f dB\n", snr.imag_snr_);
printf(" complex part %f dB\n", snr.complex_snr_);
}
/*
* Like TestFFT, but do just the forward FFT.
*/
float RunOneForwardTest(int fft_log_size, int signal_type, float signal_value,
struct SnrResult* snr) {
OMX_SC32* x;
OMX_SC32* y;
struct AlignedPtr* x_aligned;
struct AlignedPtr* y_aligned;
OMX_SC32* y_true;
OMX_INT n, fft_spec_buffer_size;
OMXResult status;
OMXFFTSpec_C_SC32 * fft_fwd_spec = NULL;
int fft_size;
fft_size = 1 << fft_log_size;
status = omxSP_FFTGetBufSize_C_SC32(fft_log_size, &fft_spec_buffer_size);
if (verbose > 63) {
printf("fft_spec_buffer_size = %d\n", fft_spec_buffer_size);
}
fft_fwd_spec = (OMXFFTSpec_C_SC32*) malloc(fft_spec_buffer_size);
status = omxSP_FFTInit_C_SC32(fft_fwd_spec, fft_log_size);
if (status) {
fprintf(stderr, "Failed to init forward FFT: status = %d\n", status);
exit(1);
}
x_aligned = AllocAlignedPointer(32, sizeof(*x) * fft_size);
y_aligned = AllocAlignedPointer(32, sizeof(*y) * (fft_size + 2));
y_true = (OMX_SC32*) malloc(sizeof(*y_true) * fft_size);
x = x_aligned->aligned_pointer_;
y = y_aligned->aligned_pointer_;
GenerateSignal(x, y_true, fft_size, signal_type);
if (verbose > 63) {
printf("Signal\n");
DumpArrayComplex32("x", fft_size, x);
printf("Expected FFT output\n");
DumpArrayComplex32("y", fft_size, y_true);
}
status = omxSP_FFTFwd_CToC_SC32_Sfs(x, y, fft_fwd_spec, 0);
if (status) {
fprintf(stderr, "Forward FFT failed: status = %d\n", status);
exit(1);
}
if (verbose > 63) {
printf("FFT Output\n");
DumpArrayComplex32("y", fft_size, y);
}
CompareComplex32(snr, y, y_true, fft_size);
FreeAlignedPointer(x_aligned);
FreeAlignedPointer(y_aligned);
free(fft_fwd_spec);
return snr->complex_snr_;
}
/*
* Like TestFFT, but do just the inverse FFT
*/
float RunOneInverseTest(int fft_log_size, int signal_type, float signal_value,
struct SnrResult* snr) {
OMX_SC32* x;
OMX_SC32* y;
OMX_SC32* z;
struct AlignedPtr* x_aligned;
struct AlignedPtr* y_aligned;
struct AlignedPtr* z_aligned;
OMX_INT n, fft_spec_buffer_size;
OMXResult status;
OMXFFTSpec_C_SC32 * fft_fwd_spec = NULL;
OMXFFTSpec_C_SC32 * fft_inv_spec = NULL;
int fft_size;
fft_size = 1 << fft_log_size;
status = omxSP_FFTGetBufSize_C_SC32(fft_log_size, &fft_spec_buffer_size);
if (verbose > 3) {
printf("fft_spec_buffer_size = %d\n", fft_spec_buffer_size);
}
fft_inv_spec = (OMXFFTSpec_C_SC32*)malloc(fft_spec_buffer_size);
status = omxSP_FFTInit_C_SC32(fft_inv_spec, fft_log_size);
if (status) {
fprintf(stderr, "Failed to init backward FFT: status = %d\n", status);
exit(1);
}
x_aligned = AllocAlignedPointer(32, sizeof(*x) * fft_size);
y_aligned = AllocAlignedPointer(32, sizeof(*y) * (fft_size + 2));
z_aligned = AllocAlignedPointer(32, sizeof(*z) * fft_size);
x = x_aligned->aligned_pointer_;
y = y_aligned->aligned_pointer_;
z = z_aligned->aligned_pointer_;
GenerateSignal(x, y, fft_size, signal_type);
if (verbose > 63) {
printf("Inverse FFT Input Signal\n");
printf("n\tx[n]\n");
DumpArrayComplex32("x", fft_size, y);
printf("Expected Inverse FFT output\n");
DumpArrayComplex32("y", fft_size, x);
}
status = omxSP_FFTInv_CToC_SC32_Sfs(y, z, fft_inv_spec, 0);
if (status) {
fprintf(stderr, "Inverse FFT failed: status = %d\n", status);
exit(1);
}
if (verbose > 63) {
printf("Actual Inverse FFT Output\n");
DumpArrayComplex32("y", fft_size, z);
}
CompareComplex32(snr, z, x, fft_size);
FreeAlignedPointer(x_aligned);
FreeAlignedPointer(y_aligned);
FreeAlignedPointer(z_aligned);
free(fft_inv_spec);
return snr->complex_snr_;
}