Clang format of video_processing folder.

webrtc/modules/video_processing/content_analysis_sse2.cc

 /*
  *  Copyright (c) 2012 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 "webrtc/modules/video_processing/content_analysis.h"
 
 #include <emmintrin.h>
 #include <math.h>
 
 namespace webrtc {
 
 int32_t VPMContentAnalysis::TemporalDiffMetric_SSE2() {
-  uint32_t num_pixels = 0;       // counter for # of pixels
-  const uint8_t* imgBufO = orig_frame_ + border_*width_ + border_;
-  const uint8_t* imgBufP = prev_frame_ + border_*width_ + border_;
+  uint32_t num_pixels = 0;  // counter for # of pixels
+  const uint8_t* imgBufO = orig_frame_ + border_ * width_ + border_;
+  const uint8_t* imgBufP = prev_frame_ + border_ * width_ + border_;
 
-  const int32_t width_end = ((width_ - 2*border_) & -16) + border_;
+  const int32_t width_end = ((width_ - 2 * border_) & -16) + border_;
 
-  __m128i sad_64   = _mm_setzero_si128();
-  __m128i sum_64   = _mm_setzero_si128();
+  __m128i sad_64 = _mm_setzero_si128();
+  __m128i sum_64 = _mm_setzero_si128();
   __m128i sqsum_64 = _mm_setzero_si128();
-  const __m128i z  = _mm_setzero_si128();
+  const __m128i z = _mm_setzero_si128();
 
-  for (uint16_t i = 0; i < (height_ - 2*border_); i += skip_num_) {
-    __m128i sqsum_32  = _mm_setzero_si128();
+  for (uint16_t i = 0; i < (height_ - 2 * border_); i += skip_num_) {
+    __m128i sqsum_32 = _mm_setzero_si128();
 
-    const uint8_t *lineO = imgBufO;
-    const uint8_t *lineP = imgBufP;
+    const uint8_t* lineO = imgBufO;
+    const uint8_t* lineP = imgBufP;
 
     // Work on 16 pixels at a time.  For HD content with a width of 1920
     // this loop will run ~67 times (depending on border).  Maximum for
     // abs(o-p) and sum(o) will be 255. _mm_sad_epu8 produces 2 64 bit
     // results which are then accumulated.  There is no chance of
     // rollover for these two accumulators.
     // o*o will have a maximum of 255*255 = 65025.  This will roll over
     // a 16 bit accumulator as 67*65025 > 65535, but will fit in a
     // 32 bit accumulator.
     for (uint16_t j = 0; j < width_end - border_; j += 16) {
       const __m128i o = _mm_loadu_si128((__m128i*)(lineO));
       const __m128i p = _mm_loadu_si128((__m128i*)(lineP));
 
       lineO += 16;
       lineP += 16;
 
       // Abs pixel difference between frames.
-      sad_64 = _mm_add_epi64 (sad_64, _mm_sad_epu8(o, p));
+      sad_64 = _mm_add_epi64(sad_64, _mm_sad_epu8(o, p));
 
       // sum of all pixels in frame
-      sum_64 = _mm_add_epi64 (sum_64, _mm_sad_epu8(o, z));
+      sum_64 = _mm_add_epi64(sum_64, _mm_sad_epu8(o, z));
 
       // Squared sum of all pixels in frame.
-      const __m128i olo = _mm_unpacklo_epi8(o,z);
-      const __m128i ohi = _mm_unpackhi_epi8(o,z);
+      const __m128i olo = _mm_unpacklo_epi8(o, z);
+      const __m128i ohi = _mm_unpackhi_epi8(o, z);
 
       const __m128i sqsum_32_lo = _mm_madd_epi16(olo, olo);
       const __m128i sqsum_32_hi = _mm_madd_epi16(ohi, ohi);
 
       sqsum_32 = _mm_add_epi32(sqsum_32, sqsum_32_lo);
       sqsum_32 = _mm_add_epi32(sqsum_32, sqsum_32_hi);
     }
 
     // Add to 64 bit running sum as to not roll over.
-    sqsum_64 = _mm_add_epi64(sqsum_64,
-        _mm_add_epi64(_mm_unpackhi_epi32(sqsum_32,z),
-        _mm_unpacklo_epi32(sqsum_32,z)));
+    sqsum_64 =
+        _mm_add_epi64(sqsum_64, _mm_add_epi64(_mm_unpackhi_epi32(sqsum_32, z),
+                                              _mm_unpacklo_epi32(sqsum_32, z)));
 
     imgBufO += width_ * skip_num_;
     imgBufP += width_ * skip_num_;
     num_pixels += (width_end - border_);
   }
 
   __m128i sad_final_128;
   __m128i sum_final_128;
   __m128i sqsum_final_128;
 
   // Bring sums out of vector registers and into integer register
   // domain, summing them along the way.
-  _mm_store_si128 (&sad_final_128, sad_64);
-  _mm_store_si128 (&sum_final_128, sum_64);
-  _mm_store_si128 (&sqsum_final_128, sqsum_64);
+  _mm_store_si128(&sad_final_128, sad_64);
+  _mm_store_si128(&sum_final_128, sum_64);
+  _mm_store_si128(&sqsum_final_128, sqsum_64);
 
-  uint64_t *sad_final_64 = reinterpret_cast<uint64_t*>(&sad_final_128);
-  uint64_t *sum_final_64 = reinterpret_cast<uint64_t*>(&sum_final_128);
-  uint64_t *sqsum_final_64 = reinterpret_cast<uint64_t*>(&sqsum_final_128);
+  uint64_t* sad_final_64 = reinterpret_cast<uint64_t*>(&sad_final_128);
+  uint64_t* sum_final_64 = reinterpret_cast<uint64_t*>(&sum_final_128);
+  uint64_t* sqsum_final_64 = reinterpret_cast<uint64_t*>(&sqsum_final_128);
 
   const uint32_t pixelSum = sum_final_64[0] + sum_final_64[1];
   const uint64_t pixelSqSum = sqsum_final_64[0] + sqsum_final_64[1];
   const uint32_t tempDiffSum = sad_final_64[0] + sad_final_64[1];
 
   // Default.
   motion_magnitude_ = 0.0f;
 
-  if (tempDiffSum == 0) return VPM_OK;
+  if (tempDiffSum == 0)
+    return VPM_OK;
 
   // Normalize over all pixels.
   const float tempDiffAvg = (float)tempDiffSum / (float)(num_pixels);
   const float pixelSumAvg = (float)pixelSum / (float)(num_pixels);
   const float pixelSqSumAvg = (float)pixelSqSum / (float)(num_pixels);
   float contrast = pixelSqSumAvg - (pixelSumAvg * pixelSumAvg);
 
   if (contrast > 0.0) {
     contrast = sqrt(contrast);
-    motion_magnitude_ = tempDiffAvg/contrast;
+    motion_magnitude_ = tempDiffAvg / contrast;
   }
 
   return VPM_OK;
 }
 
 int32_t VPMContentAnalysis::ComputeSpatialMetrics_SSE2() {
-  const uint8_t* imgBuf = orig_frame_ + border_*width_;
+  const uint8_t* imgBuf = orig_frame_ + border_ * width_;
   const int32_t width_end = ((width_ - 2 * border_) & -16) + border_;
 
-  __m128i se_32  = _mm_setzero_si128();
+  __m128i se_32 = _mm_setzero_si128();
   __m128i sev_32 = _mm_setzero_si128();
   __m128i seh_32 = _mm_setzero_si128();
   __m128i msa_32 = _mm_setzero_si128();
   const __m128i z = _mm_setzero_si128();
 
   // Error is accumulated as a 32 bit value.  Looking at HD content with a
   // height of 1080 lines, or about 67 macro blocks.  If the 16 bit row
   // value is maxed out at 65529 for every row, 65529*1080 = 70777800, which
   // will not roll over a 32 bit accumulator.
   // skip_num_ is also used to reduce the number of rows
-  for (int32_t i = 0; i < (height_ - 2*border_); i += skip_num_) {
-    __m128i se_16  = _mm_setzero_si128();
+  for (int32_t i = 0; i < (height_ - 2 * border_); i += skip_num_) {
+    __m128i se_16 = _mm_setzero_si128();
     __m128i sev_16 = _mm_setzero_si128();
     __m128i seh_16 = _mm_setzero_si128();
     __m128i msa_16 = _mm_setzero_si128();
 
     // Row error is accumulated as a 16 bit value.  There are 8
     // accumulators.  Max value of a 16 bit number is 65529.  Looking
     // at HD content, 1080p, has a width of 1920, 120 macro blocks.
     // A mb at a time is processed at a time.  Absolute max error at
     // a point would be abs(0-255+255+255+255) which equals 1020.
     // 120*1020 = 122400.  The probability of hitting this is quite low
     // on well behaved content.  A specially crafted image could roll over.
     // border_ could also be adjusted to concentrate on just the center of
     // the images for an HD capture in order to reduce the possiblity of
     // rollover.
-    const uint8_t *lineTop = imgBuf - width_ + border_;
-    const uint8_t *lineCen = imgBuf + border_;
-    const uint8_t *lineBot = imgBuf + width_ + border_;
+    const uint8_t* lineTop = imgBuf - width_ + border_;
+    const uint8_t* lineCen = imgBuf + border_;
+    const uint8_t* lineBot = imgBuf + width_ + border_;
 
     for (int32_t j = 0; j < width_end - border_; j += 16) {
       const __m128i t = _mm_loadu_si128((__m128i*)(lineTop));
       const __m128i l = _mm_loadu_si128((__m128i*)(lineCen - 1));
       const __m128i c = _mm_loadu_si128((__m128i*)(lineCen));
       const __m128i r = _mm_loadu_si128((__m128i*)(lineCen + 1));
       const __m128i b = _mm_loadu_si128((__m128i*)(lineBot));
 
       lineTop += 16;
       lineCen += 16;
       lineBot += 16;
 
       // center pixel unpacked
-      __m128i clo = _mm_unpacklo_epi8(c,z);
-      __m128i chi = _mm_unpackhi_epi8(c,z);
+      __m128i clo = _mm_unpacklo_epi8(c, z);
+      __m128i chi = _mm_unpackhi_epi8(c, z);
 
       // left right pixels unpacked and added together
-      const __m128i lrlo = _mm_add_epi16(_mm_unpacklo_epi8(l,z),
-                                        _mm_unpacklo_epi8(r,z));
-      const __m128i lrhi = _mm_add_epi16(_mm_unpackhi_epi8(l,z),
-                                         _mm_unpackhi_epi8(r,z));
+      const __m128i lrlo =
+          _mm_add_epi16(_mm_unpacklo_epi8(l, z), _mm_unpacklo_epi8(r, z));
+      const __m128i lrhi =
+          _mm_add_epi16(_mm_unpackhi_epi8(l, z), _mm_unpackhi_epi8(r, z));
 
       // top & bottom pixels unpacked and added together
-      const __m128i tblo = _mm_add_epi16(_mm_unpacklo_epi8(t,z),
-                                         _mm_unpacklo_epi8(b,z));
-      const __m128i tbhi = _mm_add_epi16(_mm_unpackhi_epi8(t,z),
-                                         _mm_unpackhi_epi8(b,z));
+      const __m128i tblo =
+          _mm_add_epi16(_mm_unpacklo_epi8(t, z), _mm_unpacklo_epi8(b, z));
+      const __m128i tbhi =
+          _mm_add_epi16(_mm_unpackhi_epi8(t, z), _mm_unpackhi_epi8(b, z));
 
       // running sum of all pixels
       msa_16 = _mm_add_epi16(msa_16, _mm_add_epi16(chi, clo));
 
       clo = _mm_slli_epi16(clo, 1);
       chi = _mm_slli_epi16(chi, 1);
       const __m128i sevtlo = _mm_subs_epi16(clo, tblo);
       const __m128i sevthi = _mm_subs_epi16(chi, tbhi);
       const __m128i sehtlo = _mm_subs_epi16(clo, lrlo);
       const __m128i sehthi = _mm_subs_epi16(chi, lrhi);
 
       clo = _mm_slli_epi16(clo, 1);
       chi = _mm_slli_epi16(chi, 1);
       const __m128i setlo = _mm_subs_epi16(clo, _mm_add_epi16(lrlo, tblo));
       const __m128i sethi = _mm_subs_epi16(chi, _mm_add_epi16(lrhi, tbhi));
 
       // Add to 16 bit running sum
-      se_16  = _mm_add_epi16(se_16, _mm_max_epi16(setlo,
-          _mm_subs_epi16(z, setlo)));
-      se_16  = _mm_add_epi16(se_16, _mm_max_epi16(sethi,
-          _mm_subs_epi16(z, sethi)));
-      sev_16 = _mm_add_epi16(sev_16, _mm_max_epi16(sevtlo,
-                                             _mm_subs_epi16(z, sevtlo)));
-      sev_16 = _mm_add_epi16(sev_16, _mm_max_epi16(sevthi,
-          _mm_subs_epi16(z, sevthi)));
-      seh_16 = _mm_add_epi16(seh_16, _mm_max_epi16(sehtlo,
-            _mm_subs_epi16(z, sehtlo)));
-      seh_16 = _mm_add_epi16(seh_16, _mm_max_epi16(sehthi,
-            _mm_subs_epi16(z, sehthi)));
+      se_16 =
+          _mm_add_epi16(se_16, _mm_max_epi16(setlo, _mm_subs_epi16(z, setlo)));
+      se_16 =
+          _mm_add_epi16(se_16, _mm_max_epi16(sethi, _mm_subs_epi16(z, sethi)));
+      sev_16 = _mm_add_epi16(sev_16,
+                             _mm_max_epi16(sevtlo, _mm_subs_epi16(z, sevtlo)));
+      sev_16 = _mm_add_epi16(sev_16,
+                             _mm_max_epi16(sevthi, _mm_subs_epi16(z, sevthi)));
+      seh_16 = _mm_add_epi16(seh_16,
+                             _mm_max_epi16(sehtlo, _mm_subs_epi16(z, sehtlo)));
+      seh_16 = _mm_add_epi16(seh_16,
+                             _mm_max_epi16(sehthi, _mm_subs_epi16(z, sehthi)));
     }
 
     // Add to 32 bit running sum as to not roll over.
-    se_32  = _mm_add_epi32(se_32, _mm_add_epi32(_mm_unpackhi_epi16(se_16,z),
-        _mm_unpacklo_epi16(se_16,z)));
-    sev_32 = _mm_add_epi32(sev_32, _mm_add_epi32(_mm_unpackhi_epi16(sev_16,z),
-        _mm_unpacklo_epi16(sev_16,z)));
-    seh_32 = _mm_add_epi32(seh_32, _mm_add_epi32(_mm_unpackhi_epi16(seh_16,z),
-        _mm_unpacklo_epi16(seh_16,z)));
-    msa_32 = _mm_add_epi32(msa_32, _mm_add_epi32(_mm_unpackhi_epi16(msa_16,z),
-        _mm_unpacklo_epi16(msa_16,z)));
+    se_32 = _mm_add_epi32(se_32, _mm_add_epi32(_mm_unpackhi_epi16(se_16, z),
+                                               _mm_unpacklo_epi16(se_16, z)));
+    sev_32 =
+        _mm_add_epi32(sev_32, _mm_add_epi32(_mm_unpackhi_epi16(sev_16, z),
+                                            _mm_unpacklo_epi16(sev_16, z)));
+    seh_32 =
+        _mm_add_epi32(seh_32, _mm_add_epi32(_mm_unpackhi_epi16(seh_16, z),
+                                            _mm_unpacklo_epi16(seh_16, z)));
+    msa_32 =
+        _mm_add_epi32(msa_32, _mm_add_epi32(_mm_unpackhi_epi16(msa_16, z),
+                                            _mm_unpacklo_epi16(msa_16, z)));
 
     imgBuf += width_ * skip_num_;
   }
 
   __m128i se_128;
   __m128i sev_128;
   __m128i seh_128;
   __m128i msa_128;
 
   // Bring sums out of vector registers and into integer register
   // domain, summing them along the way.
-  _mm_store_si128 (&se_128, _mm_add_epi64(_mm_unpackhi_epi32(se_32,z),
-        _mm_unpacklo_epi32(se_32,z)));
-  _mm_store_si128 (&sev_128, _mm_add_epi64(_mm_unpackhi_epi32(sev_32,z),
-      _mm_unpacklo_epi32(sev_32,z)));
-  _mm_store_si128 (&seh_128, _mm_add_epi64(_mm_unpackhi_epi32(seh_32,z),
-      _mm_unpacklo_epi32(seh_32,z)));
-  _mm_store_si128 (&msa_128, _mm_add_epi64(_mm_unpackhi_epi32(msa_32,z),
-      _mm_unpacklo_epi32(msa_32,z)));
+  _mm_store_si128(&se_128, _mm_add_epi64(_mm_unpackhi_epi32(se_32, z),
+                                         _mm_unpacklo_epi32(se_32, z)));
+  _mm_store_si128(&sev_128, _mm_add_epi64(_mm_unpackhi_epi32(sev_32, z),
+                                          _mm_unpacklo_epi32(sev_32, z)));
+  _mm_store_si128(&seh_128, _mm_add_epi64(_mm_unpackhi_epi32(seh_32, z),
+                                          _mm_unpacklo_epi32(seh_32, z)));
+  _mm_store_si128(&msa_128, _mm_add_epi64(_mm_unpackhi_epi32(msa_32, z),
+                                          _mm_unpacklo_epi32(msa_32, z)));
 
-  uint64_t *se_64 = reinterpret_cast<uint64_t*>(&se_128);
-  uint64_t *sev_64 = reinterpret_cast<uint64_t*>(&sev_128);
-  uint64_t *seh_64 = reinterpret_cast<uint64_t*>(&seh_128);
-  uint64_t *msa_64 = reinterpret_cast<uint64_t*>(&msa_128);
+  uint64_t* se_64 = reinterpret_cast<uint64_t*>(&se_128);
+  uint64_t* sev_64 = reinterpret_cast<uint64_t*>(&sev_128);
+  uint64_t* seh_64 = reinterpret_cast<uint64_t*>(&seh_128);
+  uint64_t* msa_64 = reinterpret_cast<uint64_t*>(&msa_128);
 
-  const uint32_t spatialErrSum  = se_64[0] + se_64[1];
+  const uint32_t spatialErrSum = se_64[0] + se_64[1];
   const uint32_t spatialErrVSum = sev_64[0] + sev_64[1];
   const uint32_t spatialErrHSum = seh_64[0] + seh_64[1];
   const uint32_t pixelMSA = msa_64[0] + msa_64[1];
 
   // Normalize over all pixels.
-  const float spatialErr  = (float)(spatialErrSum >> 2);
+  const float spatialErr = (float)(spatialErrSum >> 2);
   const float spatialErrH = (float)(spatialErrHSum >> 1);
   const float spatialErrV = (float)(spatialErrVSum >> 1);
   const float norm = (float)pixelMSA;
 
   // 2X2:
   spatial_pred_err_ = spatialErr / norm;
 
   // 1X2:
   spatial_pred_err_h_ = spatialErrH / norm;
 
   // 2X1:
   spatial_pred_err_v_ = spatialErrV / norm;
 
-    return VPM_OK;
+  return VPM_OK;
 }
 
 }  // namespace webrtc