Add openmax dl routines for review. MUST NOT BE LANDED

third_party/openmax_dl/dl/sp/src/test/test_fft32.c

Index: third_party/openmax_dl/dl/sp/src/test/test_fft32.c
diff --git a/third_party/openmax_dl/dl/sp/src/test/test_fft32.c b/third_party/openmax_dl/dl/sp/src/test/test_fft32.c
new file mode 100644
index 0000000000000000000000000000000000000000..72ef96c405fe0ed043cd9571ad560bf756edf0b5
--- /dev/null
+++ b/third_party/openmax_dl/dl/sp/src/test/test_fft32.c
@@ -0,0 +1,266 @@
+/*
+ *  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_;
+}