Update a ton of audio code to use size_t more correctly and in general reduce

webrtc/modules/audio_processing/ns/ns_core.c

Index: webrtc/modules/audio_processing/ns/ns_core.c
diff --git a/webrtc/modules/audio_processing/ns/ns_core.c b/webrtc/modules/audio_processing/ns/ns_core.c
index 652f0fea00a3ff07443c9ca2ac70b6efa9885a0f..1d6091400e8984a7da11400390863cb7af1bf6b4 100644
--- a/webrtc/modules/audio_processing/ns/ns_core.c
+++ b/webrtc/modules/audio_processing/ns/ns_core.c
@@ -217,7 +217,7 @@ int WebRtcNs_InitCore(NoiseSuppressionC* self, uint32_t fs) {
 static void NoiseEstimation(NoiseSuppressionC* self,
                             float* magn,
                             float* noise) {
-  int i, s, offset;
+  size_t i, s, offset;
   float lmagn[HALF_ANAL_BLOCKL], delta;
 
   if (self->updates < END_STARTUP_LONG) {
@@ -522,8 +522,8 @@ static void FeatureParameterExtraction(NoiseSuppressionC* self, int flag) {
 // Spectral flatness is returned in self->featureData[0].
 static void ComputeSpectralFlatness(NoiseSuppressionC* self,
                                     const float* magnIn) {
-  int i;
-  int shiftLP = 1;  // Option to remove first bin(s) from spectral measures.
+  size_t i;
+  size_t shiftLP = 1;  // Option to remove first bin(s) from spectral measures.
   float avgSpectralFlatnessNum, avgSpectralFlatnessDen, spectralTmp;
 
   // Compute spectral measures.
@@ -568,7 +568,7 @@ static void ComputeSnr(const NoiseSuppressionC* self,
                        const float* noise,
                        float* snrLocPrior,
                        float* snrLocPost) {
-  int i;
+  size_t i;
 
   for (i = 0; i < self->magnLen; i++) {
     // Previous post SNR.
@@ -596,7 +596,7 @@ static void ComputeSpectralDifference(NoiseSuppressionC* self,
                                       const float* magnIn) {
   // avgDiffNormMagn = var(magnIn) - cov(magnIn, magnAvgPause)^2 /
   // var(magnAvgPause)
-  int i;
+  size_t i;
   float avgPause, avgMagn, covMagnPause, varPause, varMagn, avgDiffNormMagn;
 
   avgPause = 0.0;
@@ -643,7 +643,8 @@ static void SpeechNoiseProb(NoiseSuppressionC* self,
                             float* probSpeechFinal,
                             const float* snrLocPrior,
                             const float* snrLocPost) {
-  int i, sgnMap;
+  size_t i;
+  int sgnMap;
   float invLrt, gainPrior, indPrior;
   float logLrtTimeAvgKsum, besselTmp;
   float indicator0, indicator1, indicator2;
@@ -802,7 +803,7 @@ static void UpdateNoiseEstimate(NoiseSuppressionC* self,
                                 const float* snrLocPrior,
                                 const float* snrLocPost,
                                 float* noise) {
-  int i;
+  size_t i;
   float probSpeech, probNonSpeech;
   // Time-avg parameter for noise update.
   float gammaNoiseTmp = NOISE_UPDATE;
@@ -853,8 +854,8 @@ static void UpdateNoiseEstimate(NoiseSuppressionC* self,
 // Output:
 //   * |buffer| is the updated buffer.
 static void UpdateBuffer(const float* frame,
-                         int frame_length,
-                         int buffer_length,
+                         size_t frame_length,
+                         size_t buffer_length,
                          float* buffer) {
   assert(buffer_length < 2 * frame_length);
 
@@ -885,12 +886,12 @@ static void UpdateBuffer(const float* frame,
 //   * |magn| is the calculated signal magnitude in the frequency domain.
 static void FFT(NoiseSuppressionC* self,
                 float* time_data,
-                int time_data_length,
-                int magnitude_length,
+                size_t time_data_length,
+                size_t magnitude_length,
                 float* real,
                 float* imag,
                 float* magn) {
-  int i;
+  size_t i;
 
   assert(magnitude_length == time_data_length / 2 + 1);
 
@@ -923,10 +924,10 @@ static void FFT(NoiseSuppressionC* self,
 static void IFFT(NoiseSuppressionC* self,
                  const float* real,
                  const float* imag,
-                 int magnitude_length,
-                 int time_data_length,
+                 size_t magnitude_length,
+                 size_t time_data_length,
                  float* time_data) {
-  int i;
+  size_t i;
 
   assert(time_data_length == 2 * (magnitude_length - 1));
 
@@ -948,8 +949,8 @@ static void IFFT(NoiseSuppressionC* self,
 //   * |buffer| is the buffer over which the energy is calculated.
 //   * |length| is the length of the buffer.
 // Returns the calculated energy.
-static float Energy(const float* buffer, int length) {
-  int i;
+static float Energy(const float* buffer, size_t length) {
+  size_t i;
   float energy = 0.f;
 
   for (i = 0; i < length; ++i) {
@@ -968,9 +969,9 @@ static float Energy(const float* buffer, int length) {
 //   * |data_windowed| is the windowed data.
 static void Windowing(const float* window,
                       const float* data,
-                      int length,
+                      size_t length,
                       float* data_windowed) {
-  int i;
+  size_t i;
 
   for (i = 0; i < length; ++i) {
     data_windowed[i] = window[i] * data[i];
@@ -985,7 +986,7 @@ static void Windowing(const float* window,
 static void ComputeDdBasedWienerFilter(const NoiseSuppressionC* self,
                                        const float* magn,
                                        float* theFilter) {
-  int i;
+  size_t i;
   float snrPrior, previousEstimateStsa, currentEstimateStsa;
 
   for (i = 0; i < self->magnLen; i++) {
@@ -1041,8 +1042,8 @@ int WebRtcNs_set_policy_core(NoiseSuppressionC* self, int mode) {
 }
 
 void WebRtcNs_AnalyzeCore(NoiseSuppressionC* self, const float* speechFrame) {
-  int i;
-  const int kStartBand = 5;  // Skip first frequency bins during estimation.
+  size_t i;
+  const size_t kStartBand = 5;  // Skip first frequency bins during estimation.
   int updateParsFlag;
   float energy;
   float signalEnergy = 0.f;
@@ -1182,11 +1183,11 @@ void WebRtcNs_AnalyzeCore(NoiseSuppressionC* self, const float* speechFrame) {
 
 void WebRtcNs_ProcessCore(NoiseSuppressionC* self,
                           const float* const* speechFrame,
-                          int num_bands,
+                          size_t num_bands,
                           float* const* outFrame) {
   // Main routine for noise reduction.
   int flagHB = 0;
-  int i, j;
+  size_t i, j;
 
   float energy1, energy2, gain, factor, factor1, factor2;
   float fout[BLOCKL_MAX];
@@ -1210,7 +1211,7 @@ void WebRtcNs_ProcessCore(NoiseSuppressionC* self,
 
   const float* const* speechFrameHB = NULL;
   float* const* outFrameHB = NULL;
-  int num_high_bands = 0;
+  size_t num_high_bands = 0;
   if (num_bands > 1) {
     speechFrameHB = &speechFrame[1];
     outFrameHB = &outFrame[1];