libvpx: Add VP9 decoder.

source/libvpx/y4minput.c

 /*
  *  Copyright (c) 2010 The WebM 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.
  *
  *  Based on code from the OggTheora software codec source code,
  *  Copyright (C) 2002-2010 The Xiph.Org Foundation and contributors.
  */
 #include <stdlib.h>
 #include <string.h>
 #include "y4minput.h"
 
-static int y4m_parse_tags(y4m_input *_y4m,char *_tags){
+static int y4m_parse_tags(y4m_input *_y4m, char *_tags) {
   int   got_w;
   int   got_h;
   int   got_fps;
   int   got_interlace;
   int   got_par;
   int   got_chroma;
   char *p;
   char *q;
-  got_w=got_h=got_fps=got_interlace=got_par=got_chroma=0;
-  for(p=_tags;;p=q){
+  got_w = got_h = got_fps = got_interlace = got_par = got_chroma = 0;
+  for (p = _tags;; p = q) {
     /*Skip any leading spaces.*/
-    while(*p==' ')p++;
+    while (*p == ' ')p++;
     /*If that's all we have, stop.*/
-    if(p[0]=='\0')break;
+    if (p[0] == '\0')break;
     /*Find the end of this tag.*/
-    for(q=p+1;*q!='\0'&&*q!=' ';q++);
+    for (q = p + 1; *q != '\0' && *q != ' '; q++);
     /*Process the tag.*/
-    switch(p[0]){
-      case 'W':{
-        if(sscanf(p+1,"%d",&_y4m->pic_w)!=1)return -1;
-        got_w=1;
-      }break;
-      case 'H':{
-        if(sscanf(p+1,"%d",&_y4m->pic_h)!=1)return -1;
-        got_h=1;
-      }break;
-      case 'F':{
-        if(sscanf(p+1,"%d:%d",&_y4m->fps_n,&_y4m->fps_d)!=2){
+    switch (p[0]) {
+      case 'W': {
+        if (sscanf(p + 1, "%d", &_y4m->pic_w) != 1)return -1;
+        got_w = 1;
+      }
+      break;
+      case 'H': {
+        if (sscanf(p + 1, "%d", &_y4m->pic_h) != 1)return -1;
+        got_h = 1;
+      }
+      break;
+      case 'F': {
+        if (sscanf(p + 1, "%d:%d", &_y4m->fps_n, &_y4m->fps_d) != 2) {
           return -1;
         }
-        got_fps=1;
-      }break;
-      case 'I':{
-        _y4m->interlace=p[1];
-        got_interlace=1;
-      }break;
-      case 'A':{
-        if(sscanf(p+1,"%d:%d",&_y4m->par_n,&_y4m->par_d)!=2){
+        got_fps = 1;
+      }
+      break;
+      case 'I': {
+        _y4m->interlace = p[1];
+        got_interlace = 1;
+      }
+      break;
+      case 'A': {
+        if (sscanf(p + 1, "%d:%d", &_y4m->par_n, &_y4m->par_d) != 2) {
           return -1;
         }
-        got_par=1;
-      }break;
-      case 'C':{
-        if(q-p>16)return -1;
-        memcpy(_y4m->chroma_type,p+1,q-p-1);
-        _y4m->chroma_type[q-p-1]='\0';
-        got_chroma=1;
-      }break;
+        got_par = 1;
+      }
+      break;
+      case 'C': {
+        if (q - p > 16)return -1;
+        memcpy(_y4m->chroma_type, p + 1, q - p - 1);
+        _y4m->chroma_type[q - p - 1] = '\0';
+        got_chroma = 1;
+      }
+      break;
       /*Ignore unknown tags.*/
     }
   }
-  if(!got_w||!got_h||!got_fps)return -1;
-  if(!got_interlace)_y4m->interlace='?';
-  if(!got_par)_y4m->par_n=_y4m->par_d=0;
+  if (!got_w || !got_h || !got_fps)return -1;
+  if (!got_interlace)_y4m->interlace = '?';
+  if (!got_par)_y4m->par_n = _y4m->par_d = 0;
   /*Chroma-type is not specified in older files, e.g., those generated by
      mplayer.*/
-  if(!got_chroma)strcpy(_y4m->chroma_type,"420");
+  if (!got_chroma)strcpy(_y4m->chroma_type, "420");
   return 0;
 }
 
 
 
 /*All anti-aliasing filters in the following conversion functions are based on
    one of two window functions:
   The 6-tap Lanczos window (for down-sampling and shifts):
    sinc(\pi*t)*sinc(\pi*t/3), |t|<3  (sinc(t)==sin(t)/t)
    0,                         |t|>=3
@@ skipping 53 matching lines @@
   |       |       |       |
   |       |       |       |
   |       |       |       |
 
   We use a resampling filter to shift the site locations one quarter pixel (at
    the chroma plane's resolution) to the right.
   The 4:2:2 modes look exactly the same, except there are twice as many chroma
    lines, and they are vertically co-sited with the luma samples in both the
    mpeg2 and jpeg cases (thus requiring no vertical resampling).*/
 static void y4m_42xmpeg2_42xjpeg_helper(unsigned char *_dst,
- const unsigned char *_src,int _c_w,int _c_h){
+                                        const unsigned char *_src, int _c_w, int _c_h) {
   int y;
   int x;
-  for(y=0;y<_c_h;y++){
+  for (y = 0; y < _c_h; y++) {
     /*Filter: [4 -17 114 35 -9 1]/128, derived from a 6-tap Lanczos
        window.*/
-    for(x=0;x<OC_MINI(_c_w,2);x++){
-      _dst[x]=(unsigned char)OC_CLAMPI(0,(4*_src[0]-17*_src[OC_MAXI(x-1,0)]+
-       114*_src[x]+35*_src[OC_MINI(x+1,_c_w-1)]-9*_src[OC_MINI(x+2,_c_w-1)]+
-       _src[OC_MINI(x+3,_c_w-1)]+64)>>7,255);
+    for (x = 0; x < OC_MINI(_c_w, 2); x++) {
+      _dst[x] = (unsigned char)OC_CLAMPI(0, (4 * _src[0] - 17 * _src[OC_MAXI(x - 1, 0)] +
+                                             114 * _src[x] + 35 * _src[OC_MINI(x + 1, _c_w - 1)] - 9 * _src[OC_MINI(x + 2, _c_w - 1)] +
+                                             _src[OC_MINI(x + 3, _c_w - 1)] + 64) >> 7, 255);
     }
-    for(;x<_c_w-3;x++){
-      _dst[x]=(unsigned char)OC_CLAMPI(0,(4*_src[x-2]-17*_src[x-1]+
-       114*_src[x]+35*_src[x+1]-9*_src[x+2]+_src[x+3]+64)>>7,255);
+    for (; x < _c_w - 3; x++) {
+      _dst[x] = (unsigned char)OC_CLAMPI(0, (4 * _src[x - 2] - 17 * _src[x - 1] +
+                                             114 * _src[x] + 35 * _src[x + 1] - 9 * _src[x + 2] + _src[x + 3] + 64) >> 7, 255);
     }
-    for(;x<_c_w;x++){
-      _dst[x]=(unsigned char)OC_CLAMPI(0,(4*_src[x-2]-17*_src[x-1]+
-       114*_src[x]+35*_src[OC_MINI(x+1,_c_w-1)]-9*_src[OC_MINI(x+2,_c_w-1)]+
-       _src[_c_w-1]+64)>>7,255);
+    for (; x < _c_w; x++) {
+      _dst[x] = (unsigned char)OC_CLAMPI(0, (4 * _src[x - 2] - 17 * _src[x - 1] +
+                                             114 * _src[x] + 35 * _src[OC_MINI(x + 1, _c_w - 1)] - 9 * _src[OC_MINI(x + 2, _c_w - 1)] +
+                                             _src[_c_w - 1] + 64) >> 7, 255);
     }
-    _dst+=_c_w;
-    _src+=_c_w;
+    _dst += _c_w;
+    _src += _c_w;
   }
 }
 
 /*Handles both 422 and 420mpeg2 to 422jpeg and 420jpeg, respectively.*/
-static void y4m_convert_42xmpeg2_42xjpeg(y4m_input *_y4m,unsigned char *_dst,
- unsigned char *_aux){
+static void y4m_convert_42xmpeg2_42xjpeg(y4m_input *_y4m, unsigned char *_dst,
+                                         unsigned char *_aux) {
   int c_w;
   int c_h;
   int c_sz;
   int pli;
   /*Skip past the luma data.*/
-  _dst+=_y4m->pic_w*_y4m->pic_h;
+  _dst += _y4m->pic_w * _y4m->pic_h;
   /*Compute the size of each chroma plane.*/
-  c_w=(_y4m->pic_w+_y4m->dst_c_dec_h-1)/_y4m->dst_c_dec_h;
-  c_h=(_y4m->pic_h+_y4m->dst_c_dec_v-1)/_y4m->dst_c_dec_v;
-  c_sz=c_w*c_h;
-  for(pli=1;pli<3;pli++){
-    y4m_42xmpeg2_42xjpeg_helper(_dst,_aux,c_w,c_h);
-    _dst+=c_sz;
-    _aux+=c_sz;
+  c_w = (_y4m->pic_w + _y4m->dst_c_dec_h - 1) / _y4m->dst_c_dec_h;
+  c_h = (_y4m->pic_h + _y4m->dst_c_dec_v - 1) / _y4m->dst_c_dec_v;
+  c_sz = c_w * c_h;
+  for (pli = 1; pli < 3; pli++) {
+    y4m_42xmpeg2_42xjpeg_helper(_dst, _aux, c_w, c_h);
+    _dst += c_sz;
+    _aux += c_sz;
   }
 }
 
 /*This format is only used for interlaced content, but is included for
    completeness.
 
   420jpeg chroma samples are sited like:
   Y-------Y-------Y-------Y-------
   |       |       |       |
   |   BR  |       |   BR  |
@@ skipping 26 matching lines @@
   |       |       |       |
   YB------Y-------YB------Y-------
   |       |       |       |
   |       |       |       |
   |       |       |       |
 
   We use a resampling filter to shift the site locations one quarter pixel (at
    the chroma plane's resolution) to the right.
   Then we use another filter to move the C_r location down one quarter pixel,
    and the C_b location up one quarter pixel.*/
-static void y4m_convert_42xpaldv_42xjpeg(y4m_input *_y4m,unsigned char *_dst,
- unsigned char *_aux){
+static void y4m_convert_42xpaldv_42xjpeg(y4m_input *_y4m, unsigned char *_dst,
+                                         unsigned char *_aux) {
   unsigned char *tmp;
   int            c_w;
   int            c_h;
   int            c_sz;
   int            pli;
   int            y;
   int            x;
   /*Skip past the luma data.*/
-  _dst+=_y4m->pic_w*_y4m->pic_h;
+  _dst += _y4m->pic_w * _y4m->pic_h;
   /*Compute the size of each chroma plane.*/
-  c_w=(_y4m->pic_w+1)/2;
-  c_h=(_y4m->pic_h+_y4m->dst_c_dec_h-1)/_y4m->dst_c_dec_h;
-  c_sz=c_w*c_h;
-  tmp=_aux+2*c_sz;
-  for(pli=1;pli<3;pli++){
+  c_w = (_y4m->pic_w + 1) / 2;
+  c_h = (_y4m->pic_h + _y4m->dst_c_dec_h - 1) / _y4m->dst_c_dec_h;
+  c_sz = c_w * c_h;
+  tmp = _aux + 2 * c_sz;
+  for (pli = 1; pli < 3; pli++) {
     /*First do the horizontal re-sampling.
       This is the same as the mpeg2 case, except that after the horizontal
        case, we need to apply a second vertical filter.*/
-    y4m_42xmpeg2_42xjpeg_helper(tmp,_aux,c_w,c_h);
-    _aux+=c_sz;
-    switch(pli){
-      case 1:{
+    y4m_42xmpeg2_42xjpeg_helper(tmp, _aux, c_w, c_h);
+    _aux += c_sz;
+    switch (pli) {
+      case 1: {
         /*Slide C_b up a quarter-pel.
           This is the same filter used above, but in the other order.*/
-        for(x=0;x<c_w;x++){
-          for(y=0;y<OC_MINI(c_h,3);y++){
-            _dst[y*c_w]=(unsigned char)OC_CLAMPI(0,(tmp[0]
-             -9*tmp[OC_MAXI(y-2,0)*c_w]+35*tmp[OC_MAXI(y-1,0)*c_w]
-             +114*tmp[y*c_w]-17*tmp[OC_MINI(y+1,c_h-1)*c_w]
-             +4*tmp[OC_MINI(y+2,c_h-1)*c_w]+64)>>7,255);
+        for (x = 0; x < c_w; x++) {
+          for (y = 0; y < OC_MINI(c_h, 3); y++) {
+            _dst[y * c_w] = (unsigned char)OC_CLAMPI(0, (tmp[0]
+                                                         - 9 * tmp[OC_MAXI(y - 2, 0) * c_w] + 35 * tmp[OC_MAXI(y - 1, 0) * c_w]
+                                                         + 114 * tmp[y * c_w] - 17 * tmp[OC_MINI(y + 1, c_h - 1) * c_w]
+                                                         + 4 * tmp[OC_MINI(y + 2, c_h - 1) * c_w] + 64) >> 7, 255);
           }
-          for(;y<c_h-2;y++){
-            _dst[y*c_w]=(unsigned char)OC_CLAMPI(0,(tmp[(y-3)*c_w]
-             -9*tmp[(y-2)*c_w]+35*tmp[(y-1)*c_w]+114*tmp[y*c_w]
-             -17*tmp[(y+1)*c_w]+4*tmp[(y+2)*c_w]+64)>>7,255);
+          for (; y < c_h - 2; y++) {
+            _dst[y * c_w] = (unsigned char)OC_CLAMPI(0, (tmp[(y - 3) * c_w]
+                                                         - 9 * tmp[(y - 2) * c_w] + 35 * tmp[(y - 1) * c_w] + 114 * tmp[y * c_w]
+                                                         - 17 * tmp[(y + 1) * c_w] + 4 * tmp[(y + 2) * c_w] + 64) >> 7, 255);
           }
-          for(;y<c_h;y++){
-            _dst[y*c_w]=(unsigned char)OC_CLAMPI(0,(tmp[(y-3)*c_w]
-             -9*tmp[(y-2)*c_w]+35*tmp[(y-1)*c_w]+114*tmp[y*c_w]
-             -17*tmp[OC_MINI(y+1,c_h-1)*c_w]+4*tmp[(c_h-1)*c_w]+64)>>7,255);
+          for (; y < c_h; y++) {
+            _dst[y * c_w] = (unsigned char)OC_CLAMPI(0, (tmp[(y - 3) * c_w]
+                                                         - 9 * tmp[(y - 2) * c_w] + 35 * tmp[(y - 1) * c_w] + 114 * tmp[y * c_w]
+                                                         - 17 * tmp[OC_MINI(y + 1, c_h - 1) * c_w] + 4 * tmp[(c_h - 1) * c_w] + 64) >> 7, 255);
           }
           _dst++;
           tmp++;
         }
-        _dst+=c_sz-c_w;
-        tmp-=c_w;
-      }break;
-      case 2:{
+        _dst += c_sz - c_w;
+        tmp -= c_w;
+      }
+      break;
+      case 2: {
         /*Slide C_r down a quarter-pel.
           This is the same as the horizontal filter.*/
-        for(x=0;x<c_w;x++){
-          for(y=0;y<OC_MINI(c_h,2);y++){
-            _dst[y*c_w]=(unsigned char)OC_CLAMPI(0,(4*tmp[0]
-             -17*tmp[OC_MAXI(y-1,0)*c_w]+114*tmp[y*c_w]
-             +35*tmp[OC_MINI(y+1,c_h-1)*c_w]-9*tmp[OC_MINI(y+2,c_h-1)*c_w]
-             +tmp[OC_MINI(y+3,c_h-1)*c_w]+64)>>7,255);
+        for (x = 0; x < c_w; x++) {
+          for (y = 0; y < OC_MINI(c_h, 2); y++) {
+            _dst[y * c_w] = (unsigned char)OC_CLAMPI(0, (4 * tmp[0]
+                                                         - 17 * tmp[OC_MAXI(y - 1, 0) * c_w] + 114 * tmp[y * c_w]
+                                                         + 35 * tmp[OC_MINI(y + 1, c_h - 1) * c_w] - 9 * tmp[OC_MINI(y + 2, c_h - 1) * c_w]
+                                                         + tmp[OC_MINI(y + 3, c_h - 1) * c_w] + 64) >> 7, 255);
           }
-          for(;y<c_h-3;y++){
-            _dst[y*c_w]=(unsigned char)OC_CLAMPI(0,(4*tmp[(y-2)*c_w]
-             -17*tmp[(y-1)*c_w]+114*tmp[y*c_w]+35*tmp[(y+1)*c_w]
-             -9*tmp[(y+2)*c_w]+tmp[(y+3)*c_w]+64)>>7,255);
+          for (; y < c_h - 3; y++) {
+            _dst[y * c_w] = (unsigned char)OC_CLAMPI(0, (4 * tmp[(y - 2) * c_w]
+                                                         - 17 * tmp[(y - 1) * c_w] + 114 * tmp[y * c_w] + 35 * tmp[(y + 1) * c_w]
+                                                         - 9 * tmp[(y + 2) * c_w] + tmp[(y + 3) * c_w] + 64) >> 7, 255);
           }
-          for(;y<c_h;y++){
-            _dst[y*c_w]=(unsigned char)OC_CLAMPI(0,(4*tmp[(y-2)*c_w]
-             -17*tmp[(y-1)*c_w]+114*tmp[y*c_w]+35*tmp[OC_MINI(y+1,c_h-1)*c_w]
-             -9*tmp[OC_MINI(y+2,c_h-1)*c_w]+tmp[(c_h-1)*c_w]+64)>>7,255);
+          for (; y < c_h; y++) {
+            _dst[y * c_w] = (unsigned char)OC_CLAMPI(0, (4 * tmp[(y - 2) * c_w]
+                                                         - 17 * tmp[(y - 1) * c_w] + 114 * tmp[y * c_w] + 35 * tmp[OC_MINI(y + 1, c_h - 1) * c_w]
+                                                         - 9 * tmp[OC_MINI(y + 2, c_h - 1) * c_w] + tmp[(c_h - 1) * c_w] + 64) >> 7, 255);
           }
           _dst++;
           tmp++;
         }
-      }break;
+      }
+      break;
     }
     /*For actual interlaced material, this would have to be done separately on
        each field, and the shift amounts would be different.
       C_r moves down 1/8, C_b up 3/8 in the top field, and C_r moves down 3/8,
        C_b up 1/8 in the bottom field.
       The corresponding filters would be:
        Down 1/8 (reverse order for up): [3 -11 125 15 -4 0]/128
        Down 3/8 (reverse order for up): [4 -19 98 56 -13 2]/128*/
   }
 }
 
 /*Perform vertical filtering to reduce a single plane from 4:2:2 to 4:2:0.
   This is used as a helper by several converation routines.*/
 static void y4m_422jpeg_420jpeg_helper(unsigned char *_dst,
- const unsigned char *_src,int _c_w,int _c_h){
+                                       const unsigned char *_src, int _c_w, int _c_h) {
   int y;
   int x;
   /*Filter: [3 -17 78 78 -17 3]/128, derived from a 6-tap Lanczos window.*/
-  for(x=0;x<_c_w;x++){
-    for(y=0;y<OC_MINI(_c_h,2);y+=2){
-      _dst[(y>>1)*_c_w]=OC_CLAMPI(0,(64*_src[0]
-       +78*_src[OC_MINI(1,_c_h-1)*_c_w]
-       -17*_src[OC_MINI(2,_c_h-1)*_c_w]
-       +3*_src[OC_MINI(3,_c_h-1)*_c_w]+64)>>7,255);
+  for (x = 0; x < _c_w; x++) {
+    for (y = 0; y < OC_MINI(_c_h, 2); y += 2) {
+      _dst[(y >> 1)*_c_w] = OC_CLAMPI(0, (64 * _src[0]
+                                          + 78 * _src[OC_MINI(1, _c_h - 1) * _c_w]
+                                          - 17 * _src[OC_MINI(2, _c_h - 1) * _c_w]
+                                          + 3 * _src[OC_MINI(3, _c_h - 1) * _c_w] + 64) >> 7, 255);
     }
-    for(;y<_c_h-3;y+=2){
-      _dst[(y>>1)*_c_w]=OC_CLAMPI(0,(3*(_src[(y-2)*_c_w]+_src[(y+3)*_c_w])
-       -17*(_src[(y-1)*_c_w]+_src[(y+2)*_c_w])
-       +78*(_src[y*_c_w]+_src[(y+1)*_c_w])+64)>>7,255);
+    for (; y < _c_h - 3; y += 2) {
+      _dst[(y >> 1)*_c_w] = OC_CLAMPI(0, (3 * (_src[(y - 2) * _c_w] + _src[(y + 3) * _c_w])
+                                          - 17 * (_src[(y - 1) * _c_w] + _src[(y + 2) * _c_w])
+                                          + 78 * (_src[y * _c_w] + _src[(y + 1) * _c_w]) + 64) >> 7, 255);
     }
-    for(;y<_c_h;y+=2){
-      _dst[(y>>1)*_c_w]=OC_CLAMPI(0,(3*(_src[(y-2)*_c_w]
-       +_src[(_c_h-1)*_c_w])-17*(_src[(y-1)*_c_w]
-       +_src[OC_MINI(y+2,_c_h-1)*_c_w])
-       +78*(_src[y*_c_w]+_src[OC_MINI(y+1,_c_h-1)*_c_w])+64)>>7,255);
+    for (; y < _c_h; y += 2) {
+      _dst[(y >> 1)*_c_w] = OC_CLAMPI(0, (3 * (_src[(y - 2) * _c_w]
+                                               + _src[(_c_h - 1) * _c_w]) - 17 * (_src[(y - 1) * _c_w]
+                                                                                  + _src[OC_MINI(y + 2, _c_h - 1) * _c_w])
+                                          + 78 * (_src[y * _c_w] + _src[OC_MINI(y + 1, _c_h - 1) * _c_w]) + 64) >> 7, 255);
     }
     _src++;
     _dst++;
   }
 }
 
 /*420jpeg chroma samples are sited like:
   Y-------Y-------Y-------Y-------
   |       |       |       |
   |   BR  |       |   BR  |
@@ skipping 24 matching lines @@
   |       |       |       |
   |       |       |       |
   |       |       |       |
   Y---BR--Y-------Y---BR--Y-------
   |       |       |       |
   |       |       |       |
   |       |       |       |
 
   We use a resampling filter to decimate the chroma planes by two in the
    vertical direction.*/
-static void y4m_convert_422jpeg_420jpeg(y4m_input *_y4m,unsigned char *_dst,
- unsigned char *_aux){
+static void y4m_convert_422jpeg_420jpeg(y4m_input *_y4m, unsigned char *_dst,
+                                        unsigned char *_aux) {
   int c_w;
   int c_h;
   int c_sz;
   int dst_c_w;
   int dst_c_h;
   int dst_c_sz;
   int pli;
   /*Skip past the luma data.*/
-  _dst+=_y4m->pic_w*_y4m->pic_h;
+  _dst += _y4m->pic_w * _y4m->pic_h;
   /*Compute the size of each chroma plane.*/
-  c_w=(_y4m->pic_w+_y4m->src_c_dec_h-1)/_y4m->src_c_dec_h;
-  c_h=_y4m->pic_h;
-  dst_c_w=(_y4m->pic_w+_y4m->dst_c_dec_h-1)/_y4m->dst_c_dec_h;
-  dst_c_h=(_y4m->pic_h+_y4m->dst_c_dec_v-1)/_y4m->dst_c_dec_v;
-  c_sz=c_w*c_h;
-  dst_c_sz=dst_c_w*dst_c_h;
-  for(pli=1;pli<3;pli++){
-    y4m_422jpeg_420jpeg_helper(_dst,_aux,c_w,c_h);
-    _aux+=c_sz;
-    _dst+=dst_c_sz;
+  c_w = (_y4m->pic_w + _y4m->src_c_dec_h - 1) / _y4m->src_c_dec_h;
+  c_h = _y4m->pic_h;
+  dst_c_w = (_y4m->pic_w + _y4m->dst_c_dec_h - 1) / _y4m->dst_c_dec_h;
+  dst_c_h = (_y4m->pic_h + _y4m->dst_c_dec_v - 1) / _y4m->dst_c_dec_v;
+  c_sz = c_w * c_h;
+  dst_c_sz = dst_c_w * dst_c_h;
+  for (pli = 1; pli < 3; pli++) {
+    y4m_422jpeg_420jpeg_helper(_dst, _aux, c_w, c_h);
+    _aux += c_sz;
+    _dst += dst_c_sz;
   }
 }
 
 /*420jpeg chroma samples are sited like:
   Y-------Y-------Y-------Y-------
   |       |       |       |
   |   BR  |       |   BR  |
   |       |       |       |
   Y-------Y-------Y-------Y-------
   |       |       |       |
@@ skipping 23 matching lines @@
   |       |       |       |
   YBR-----Y-------YBR-----Y-------
   |       |       |       |
   |       |       |       |
   |       |       |       |
 
   We use a resampling filter to shift the original site locations one quarter
    pixel (at the original chroma resolution) to the right.
   Then we use a second resampling filter to decimate the chroma planes by two
    in the vertical direction.*/
-static void y4m_convert_422_420jpeg(y4m_input *_y4m,unsigned char *_dst,
- unsigned char *_aux){
+static void y4m_convert_422_420jpeg(y4m_input *_y4m, unsigned char *_dst,
+                                    unsigned char *_aux) {
   unsigned char *tmp;
   int            c_w;
   int            c_h;
   int            c_sz;
   int            dst_c_h;
   int            dst_c_sz;
   int            pli;
   /*Skip past the luma data.*/
-  _dst+=_y4m->pic_w*_y4m->pic_h;
+  _dst += _y4m->pic_w * _y4m->pic_h;
   /*Compute the size of each chroma plane.*/
-  c_w=(_y4m->pic_w+_y4m->src_c_dec_h-1)/_y4m->src_c_dec_h;
-  c_h=_y4m->pic_h;
-  dst_c_h=(_y4m->pic_h+_y4m->dst_c_dec_v-1)/_y4m->dst_c_dec_v;
-  c_sz=c_w*c_h;
-  dst_c_sz=c_w*dst_c_h;
-  tmp=_aux+2*c_sz;
-  for(pli=1;pli<3;pli++){
+  c_w = (_y4m->pic_w + _y4m->src_c_dec_h - 1) / _y4m->src_c_dec_h;
+  c_h = _y4m->pic_h;
+  dst_c_h = (_y4m->pic_h + _y4m->dst_c_dec_v - 1) / _y4m->dst_c_dec_v;
+  c_sz = c_w * c_h;
+  dst_c_sz = c_w * dst_c_h;
+  tmp = _aux + 2 * c_sz;
+  for (pli = 1; pli < 3; pli++) {
     /*In reality, the horizontal and vertical steps could be pipelined, for
        less memory consumption and better cache performance, but we do them
        separately for simplicity.*/
     /*First do horizontal filtering (convert to 422jpeg)*/
-    y4m_42xmpeg2_42xjpeg_helper(tmp,_aux,c_w,c_h);
+    y4m_42xmpeg2_42xjpeg_helper(tmp, _aux, c_w, c_h);
     /*Now do the vertical filtering.*/
-    y4m_422jpeg_420jpeg_helper(_dst,tmp,c_w,c_h);
-    _aux+=c_sz;
-    _dst+=dst_c_sz;
+    y4m_422jpeg_420jpeg_helper(_dst, tmp, c_w, c_h);
+    _aux += c_sz;
+    _dst += dst_c_sz;
   }
 }
 
 /*420jpeg chroma samples are sited like:
   Y-------Y-------Y-------Y-------
   |       |       |       |
   |   BR  |       |   BR  |
   |       |       |       |
   Y-------Y-------Y-------Y-------
   |       |       |       |
@@ skipping 24 matching lines @@
   YBR-----Y-------Y-------Y-------
   |       |       |       |
   |       |       |       |
   |       |       |       |
 
   We use a filter to resample at site locations one eighth pixel (at the source
    chroma plane's horizontal resolution) and five eighths of a pixel to the
    right.
   Then we use another filter to decimate the planes by 2 in the vertical
    direction.*/
-static void y4m_convert_411_420jpeg(y4m_input *_y4m,unsigned char *_dst,
- unsigned char *_aux){
+static void y4m_convert_411_420jpeg(y4m_input *_y4m, unsigned char *_dst,
+                                    unsigned char *_aux) {
   unsigned char *tmp;
   int            c_w;
   int            c_h;
   int            c_sz;
   int            dst_c_w;
   int            dst_c_h;
   int            dst_c_sz;
   int            tmp_sz;
   int            pli;
   int            y;
   int            x;
   /*Skip past the luma data.*/
-  _dst+=_y4m->pic_w*_y4m->pic_h;
+  _dst += _y4m->pic_w * _y4m->pic_h;
   /*Compute the size of each chroma plane.*/
-  c_w=(_y4m->pic_w+_y4m->src_c_dec_h-1)/_y4m->src_c_dec_h;
-  c_h=_y4m->pic_h;
-  dst_c_w=(_y4m->pic_w+_y4m->dst_c_dec_h-1)/_y4m->dst_c_dec_h;
-  dst_c_h=(_y4m->pic_h+_y4m->dst_c_dec_v-1)/_y4m->dst_c_dec_v;
-  c_sz=c_w*c_h;
-  dst_c_sz=dst_c_w*dst_c_h;
-  tmp_sz=dst_c_w*c_h;
-  tmp=_aux+2*c_sz;
-  for(pli=1;pli<3;pli++){
+  c_w = (_y4m->pic_w + _y4m->src_c_dec_h - 1) / _y4m->src_c_dec_h;
+  c_h = _y4m->pic_h;
+  dst_c_w = (_y4m->pic_w + _y4m->dst_c_dec_h - 1) / _y4m->dst_c_dec_h;
+  dst_c_h = (_y4m->pic_h + _y4m->dst_c_dec_v - 1) / _y4m->dst_c_dec_v;
+  c_sz = c_w * c_h;
+  dst_c_sz = dst_c_w * dst_c_h;
+  tmp_sz = dst_c_w * c_h;
+  tmp = _aux + 2 * c_sz;
+  for (pli = 1; pli < 3; pli++) {
     /*In reality, the horizontal and vertical steps could be pipelined, for
        less memory consumption and better cache performance, but we do them
        separately for simplicity.*/
     /*First do horizontal filtering (convert to 422jpeg)*/
-    for(y=0;y<c_h;y++){
+    for (y = 0; y < c_h; y++) {
       /*Filters: [1 110 18 -1]/128 and [-3 50 86 -5]/128, both derived from a
          4-tap Mitchell window.*/
-      for(x=0;x<OC_MINI(c_w,1);x++){
-        tmp[x<<1]=(unsigned char)OC_CLAMPI(0,(111*_aux[0]
-         +18*_aux[OC_MINI(1,c_w-1)]-_aux[OC_MINI(2,c_w-1)]+64)>>7,255);
-        tmp[x<<1|1]=(unsigned char)OC_CLAMPI(0,(47*_aux[0]
-         +86*_aux[OC_MINI(1,c_w-1)]-5*_aux[OC_MINI(2,c_w-1)]+64)>>7,255);
+      for (x = 0; x < OC_MINI(c_w, 1); x++) {
+        tmp[x << 1] = (unsigned char)OC_CLAMPI(0, (111 * _aux[0]
+                                                   + 18 * _aux[OC_MINI(1, c_w - 1)] - _aux[OC_MINI(2, c_w - 1)] + 64) >> 7, 255);
+        tmp[x << 1 | 1] = (unsigned char)OC_CLAMPI(0, (47 * _aux[0]
+                                                       + 86 * _aux[OC_MINI(1, c_w - 1)] - 5 * _aux[OC_MINI(2, c_w - 1)] + 64) >> 7, 255);
       }
-      for(;x<c_w-2;x++){
-        tmp[x<<1]=(unsigned char)OC_CLAMPI(0,(_aux[x-1]+110*_aux[x]
-         +18*_aux[x+1]-_aux[x+2]+64)>>7,255);
-        tmp[x<<1|1]=(unsigned char)OC_CLAMPI(0,(-3*_aux[x-1]+50*_aux[x]
-         +86*_aux[x+1]-5*_aux[x+2]+64)>>7,255);
+      for (; x < c_w - 2; x++) {
+        tmp[x << 1] = (unsigned char)OC_CLAMPI(0, (_aux[x - 1] + 110 * _aux[x]
+                                                   + 18 * _aux[x + 1] - _aux[x + 2] + 64) >> 7, 255);
+        tmp[x << 1 | 1] = (unsigned char)OC_CLAMPI(0, (-3 * _aux[x - 1] + 50 * _aux[x]
+                                                       + 86 * _aux[x + 1] - 5 * _aux[x + 2] + 64) >> 7, 255);
       }
-      for(;x<c_w;x++){
-        tmp[x<<1]=(unsigned char)OC_CLAMPI(0,(_aux[x-1]+110*_aux[x]
-         +18*_aux[OC_MINI(x+1,c_w-1)]-_aux[c_w-1]+64)>>7,255);
-        if((x<<1|1)<dst_c_w){
-          tmp[x<<1|1]=(unsigned char)OC_CLAMPI(0,(-3*_aux[x-1]+50*_aux[x]
-           +86*_aux[OC_MINI(x+1,c_w-1)]-5*_aux[c_w-1]+64)>>7,255);
+      for (; x < c_w; x++) {
+        tmp[x << 1] = (unsigned char)OC_CLAMPI(0, (_aux[x - 1] + 110 * _aux[x]
+                                                   + 18 * _aux[OC_MINI(x + 1, c_w - 1)] - _aux[c_w - 1] + 64) >> 7, 255);
+        if ((x << 1 | 1) < dst_c_w) {
+          tmp[x << 1 | 1] = (unsigned char)OC_CLAMPI(0, (-3 * _aux[x - 1] + 50 * _aux[x]
+                                                         + 86 * _aux[OC_MINI(x + 1, c_w - 1)] - 5 * _aux[c_w - 1] + 64) >> 7, 255);
         }
       }
-      tmp+=dst_c_w;
-      _aux+=c_w;
+      tmp += dst_c_w;
+      _aux += c_w;
     }
-    tmp-=tmp_sz;
+    tmp -= tmp_sz;
     /*Now do the vertical filtering.*/
-    y4m_422jpeg_420jpeg_helper(_dst,tmp,dst_c_w,c_h);
-    _dst+=dst_c_sz;
+    y4m_422jpeg_420jpeg_helper(_dst, tmp, dst_c_w, c_h);
+    _dst += dst_c_sz;
   }
 }
 
 /*Convert 444 to 420jpeg.*/
-static void y4m_convert_444_420jpeg(y4m_input *_y4m,unsigned char *_dst,
- unsigned char *_aux){
+static void y4m_convert_444_420jpeg(y4m_input *_y4m, unsigned char *_dst,
+                                    unsigned char *_aux) {
   unsigned char *tmp;
   int            c_w;
   int            c_h;
   int            c_sz;
   int            dst_c_w;
   int            dst_c_h;
   int            dst_c_sz;
   int            tmp_sz;
   int            pli;
   int            y;
   int            x;
   /*Skip past the luma data.*/
-  _dst+=_y4m->pic_w*_y4m->pic_h;
+  _dst += _y4m->pic_w * _y4m->pic_h;
   /*Compute the size of each chroma plane.*/
-  c_w=(_y4m->pic_w+_y4m->src_c_dec_h-1)/_y4m->src_c_dec_h;
-  c_h=_y4m->pic_h;
-  dst_c_w=(_y4m->pic_w+_y4m->dst_c_dec_h-1)/_y4m->dst_c_dec_h;
-  dst_c_h=(_y4m->pic_h+_y4m->dst_c_dec_v-1)/_y4m->dst_c_dec_v;
-  c_sz=c_w*c_h;
-  dst_c_sz=dst_c_w*dst_c_h;
-  tmp_sz=dst_c_w*c_h;
-  tmp=_aux+2*c_sz;
-  for(pli=1;pli<3;pli++){
+  c_w = (_y4m->pic_w + _y4m->src_c_dec_h - 1) / _y4m->src_c_dec_h;
+  c_h = _y4m->pic_h;
+  dst_c_w = (_y4m->pic_w + _y4m->dst_c_dec_h - 1) / _y4m->dst_c_dec_h;
+  dst_c_h = (_y4m->pic_h + _y4m->dst_c_dec_v - 1) / _y4m->dst_c_dec_v;
+  c_sz = c_w * c_h;
+  dst_c_sz = dst_c_w * dst_c_h;
+  tmp_sz = dst_c_w * c_h;
+  tmp = _aux + 2 * c_sz;
+  for (pli = 1; pli < 3; pli++) {
     /*Filter: [3 -17 78 78 -17 3]/128, derived from a 6-tap Lanczos window.*/
-    for(y=0;y<c_h;y++){
-      for(x=0;x<OC_MINI(c_w,2);x+=2){
-        tmp[x>>1]=OC_CLAMPI(0,(64*_aux[0]+78*_aux[OC_MINI(1,c_w-1)]
-         -17*_aux[OC_MINI(2,c_w-1)]
-         +3*_aux[OC_MINI(3,c_w-1)]+64)>>7,255);
+    for (y = 0; y < c_h; y++) {
+      for (x = 0; x < OC_MINI(c_w, 2); x += 2) {
+        tmp[x >> 1] = OC_CLAMPI(0, (64 * _aux[0] + 78 * _aux[OC_MINI(1, c_w - 1)]
+                                    - 17 * _aux[OC_MINI(2, c_w - 1)]
+                                    + 3 * _aux[OC_MINI(3, c_w - 1)] + 64) >> 7, 255);
       }
-      for(;x<c_w-3;x+=2){
-        tmp[x>>1]=OC_CLAMPI(0,(3*(_aux[x-2]+_aux[x+3])
-         -17*(_aux[x-1]+_aux[x+2])+78*(_aux[x]+_aux[x+1])+64)>>7,255);
+      for (; x < c_w - 3; x += 2) {
+        tmp[x >> 1] = OC_CLAMPI(0, (3 * (_aux[x - 2] + _aux[x + 3])
+                                    - 17 * (_aux[x - 1] + _aux[x + 2]) + 78 * (_aux[x] + _aux[x + 1]) + 64) >> 7, 255);
       }
-      for(;x<c_w;x+=2){
-        tmp[x>>1]=OC_CLAMPI(0,(3*(_aux[x-2]+_aux[c_w-1])-
-         17*(_aux[x-1]+_aux[OC_MINI(x+2,c_w-1)])+
-         78*(_aux[x]+_aux[OC_MINI(x+1,c_w-1)])+64)>>7,255);
+      for (; x < c_w; x += 2) {
+        tmp[x >> 1] = OC_CLAMPI(0, (3 * (_aux[x - 2] + _aux[c_w - 1]) -
+                                    17 * (_aux[x - 1] + _aux[OC_MINI(x + 2, c_w - 1)]) +
+                                    78 * (_aux[x] + _aux[OC_MINI(x + 1, c_w - 1)]) + 64) >> 7, 255);
       }
-      tmp+=dst_c_w;
-      _aux+=c_w;
+      tmp += dst_c_w;
+      _aux += c_w;
     }
-    tmp-=tmp_sz;
+    tmp -= tmp_sz;
     /*Now do the vertical filtering.*/
-    y4m_422jpeg_420jpeg_helper(_dst,tmp,dst_c_w,c_h);
-    _dst+=dst_c_sz;
+    y4m_422jpeg_420jpeg_helper(_dst, tmp, dst_c_w, c_h);
+    _dst += dst_c_sz;
   }
 }
 
 /*The image is padded with empty chroma components at 4:2:0.*/
-static void y4m_convert_mono_420jpeg(y4m_input *_y4m,unsigned char *_dst,
- unsigned char *_aux){
+static void y4m_convert_mono_420jpeg(y4m_input *_y4m, unsigned char *_dst,
+                                     unsigned char *_aux) {
   int c_sz;
-  _dst+=_y4m->pic_w*_y4m->pic_h;
-  c_sz=((_y4m->pic_w+_y4m->dst_c_dec_h-1)/_y4m->dst_c_dec_h)*
-   ((_y4m->pic_h+_y4m->dst_c_dec_v-1)/_y4m->dst_c_dec_v);
-  memset(_dst,128,c_sz*2);
+  _dst += _y4m->pic_w * _y4m->pic_h;
+  c_sz = ((_y4m->pic_w + _y4m->dst_c_dec_h - 1) / _y4m->dst_c_dec_h) *
+         ((_y4m->pic_h + _y4m->dst_c_dec_v - 1) / _y4m->dst_c_dec_v);
+  memset(_dst, 128, c_sz * 2);
 }
 
 /*No conversion function needed.*/
-static void y4m_convert_null(y4m_input *_y4m,unsigned char *_dst,
- unsigned char *_aux){
-}
-
-int y4m_input_open(y4m_input *_y4m,FILE *_fin,char *_skip,int _nskip){
+static void y4m_convert_null(y4m_input *_y4m, unsigned char *_dst,
+                             unsigned char *_aux) {
+}
+
+int y4m_input_open(y4m_input *_y4m, FILE *_fin, char *_skip, int _nskip) {
   char buffer[80];
   int  ret;
   int  i;
   /*Read until newline, or 80 cols, whichever happens first.*/
-  for(i=0;i<79;i++){
-    if(_nskip>0){
-      buffer[i]=*_skip++;
+  for (i = 0; i < 79; i++) {
+    if (_nskip > 0) {
+      buffer[i] = *_skip++;
       _nskip--;
+    } else {
+      ret = (int)fread(buffer + i, 1, 1, _fin);
+      if (ret < 1)return -1;
     }
-    else{
-      ret=(int)fread(buffer+i,1,1,_fin);
-      if(ret<1)return -1;
-    }
-    if(buffer[i]=='\n')break;
+    if (buffer[i] == '\n')break;
   }
   /*We skipped too much header data.*/
-  if(_nskip>0)return -1;
-  if(i==79){
-    fprintf(stderr,"Error parsing header; not a YUV2MPEG2 file?\n");
-    return -1;
-  }
-  buffer[i]='\0';
-  if(memcmp(buffer,"YUV4MPEG",8)){
-    fprintf(stderr,"Incomplete magic for YUV4MPEG file.\n");
-    return -1;
-  }
-  if(buffer[8]!='2'){
-    fprintf(stderr,"Incorrect YUV input file version; YUV4MPEG2 required.\n");
-  }
-  ret=y4m_parse_tags(_y4m,buffer+5);
-  if(ret<0){
-    fprintf(stderr,"Error parsing YUV4MPEG2 header.\n");
+  if (_nskip > 0)return -1;
+  if (i == 79) {
+    fprintf(stderr, "Error parsing header; not a YUV2MPEG2 file?\n");
+    return -1;
+  }
+  buffer[i] = '\0';
+  if (memcmp(buffer, "YUV4MPEG", 8)) {
+    fprintf(stderr, "Incomplete magic for YUV4MPEG file.\n");
+    return -1;
+  }
+  if (buffer[8] != '2') {
+    fprintf(stderr, "Incorrect YUV input file version; YUV4MPEG2 required.\n");
+  }
+  ret = y4m_parse_tags(_y4m, buffer + 5);
+  if (ret < 0) {
+    fprintf(stderr, "Error parsing YUV4MPEG2 header.\n");
     return ret;
   }
-  if(_y4m->interlace=='?'){
-    fprintf(stderr,"Warning: Input video interlacing format unknown; "
-     "assuming progressive scan.\n");
-  }
-  else if(_y4m->interlace!='p'){
-    fprintf(stderr,"Input video is interlaced; "
-     "Only progressive scan handled.\n");
-    return -1;
-  }
-  if(strcmp(_y4m->chroma_type,"420")==0||
-   strcmp(_y4m->chroma_type,"420jpeg")==0){
-    _y4m->src_c_dec_h=_y4m->dst_c_dec_h=_y4m->src_c_dec_v=_y4m->dst_c_dec_v=2;
-    _y4m->dst_buf_read_sz=_y4m->pic_w*_y4m->pic_h
-     +2*((_y4m->pic_w+1)/2)*((_y4m->pic_h+1)/2);
+  if (_y4m->interlace == '?') {
+    fprintf(stderr, "Warning: Input video interlacing format unknown; "
+            "assuming progressive scan.\n");
+  } else if (_y4m->interlace != 'p') {
+    fprintf(stderr, "Input video is interlaced; "
+            "Only progressive scan handled.\n");
+    return -1;
+  }
+  if (strcmp(_y4m->chroma_type, "420") == 0 ||
+      strcmp(_y4m->chroma_type, "420jpeg") == 0) {
+    _y4m->src_c_dec_h = _y4m->dst_c_dec_h = _y4m->src_c_dec_v = _y4m->dst_c_dec_v = 2;
+    _y4m->dst_buf_read_sz = _y4m->pic_w * _y4m->pic_h
+                            + 2 * ((_y4m->pic_w + 1) / 2) * ((_y4m->pic_h + 1) / 2);
     /*Natively supported: no conversion required.*/
-    _y4m->aux_buf_sz=_y4m->aux_buf_read_sz=0;
-    _y4m->convert=y4m_convert_null;
-  }
-  else if(strcmp(_y4m->chroma_type,"420mpeg2")==0){
-    _y4m->src_c_dec_h=_y4m->dst_c_dec_h=_y4m->src_c_dec_v=_y4m->dst_c_dec_v=2;
-    _y4m->dst_buf_read_sz=_y4m->pic_w*_y4m->pic_h;
+    _y4m->aux_buf_sz = _y4m->aux_buf_read_sz = 0;
+    _y4m->convert = y4m_convert_null;
+  } else if (strcmp(_y4m->chroma_type, "420mpeg2") == 0) {
+    _y4m->src_c_dec_h = _y4m->dst_c_dec_h = _y4m->src_c_dec_v = _y4m->dst_c_dec_v = 2;
+    _y4m->dst_buf_read_sz = _y4m->pic_w * _y4m->pic_h;
     /*Chroma filter required: read into the aux buf first.*/
-    _y4m->aux_buf_sz=_y4m->aux_buf_read_sz=
-     2*((_y4m->pic_w+1)/2)*((_y4m->pic_h+1)/2);
-    _y4m->convert=y4m_convert_42xmpeg2_42xjpeg;
-  }
-  else if(strcmp(_y4m->chroma_type,"420paldv")==0){
-    _y4m->src_c_dec_h=_y4m->dst_c_dec_h=_y4m->src_c_dec_v=_y4m->dst_c_dec_v=2;
-    _y4m->dst_buf_read_sz=_y4m->pic_w*_y4m->pic_h;
-    /*Chroma filter required: read into the aux buf first.
-      We need to make two filter passes, so we need some extra space in the
-       aux buffer.*/
-    _y4m->aux_buf_sz=3*((_y4m->pic_w+1)/2)*((_y4m->pic_h+1)/2);
-    _y4m->aux_buf_read_sz=2*((_y4m->pic_w+1)/2)*((_y4m->pic_h+1)/2);
-    _y4m->convert=y4m_convert_42xpaldv_42xjpeg;
-  }
-  else if(strcmp(_y4m->chroma_type,"422jpeg")==0){
-    _y4m->src_c_dec_h=_y4m->dst_c_dec_h=2;
-    _y4m->src_c_dec_v=1;
-    _y4m->dst_c_dec_v=2;
-    _y4m->dst_buf_read_sz=_y4m->pic_w*_y4m->pic_h;
+    _y4m->aux_buf_sz = _y4m->aux_buf_read_sz =
+                         2 * ((_y4m->pic_w + 1) / 2) * ((_y4m->pic_h + 1) / 2);
+    _y4m->convert = y4m_convert_42xmpeg2_42xjpeg;
+  } else if (strcmp(_y4m->chroma_type, "420paldv") == 0) {
+    _y4m->src_c_dec_h = _y4m->dst_c_dec_h = _y4m->src_c_dec_v = _y4m->dst_c_dec_v = 2;
+    _y4m->dst_buf_read_sz = _y4m->pic_w * _y4m->pic_h;
+    /*Chroma filter required: read into the aux buf first.
+      We need to make two filter passes, so we need some extra space in the
+       aux buffer.*/
+    _y4m->aux_buf_sz = 3 * ((_y4m->pic_w + 1) / 2) * ((_y4m->pic_h + 1) / 2);
+    _y4m->aux_buf_read_sz = 2 * ((_y4m->pic_w + 1) / 2) * ((_y4m->pic_h + 1) / 2);
+    _y4m->convert = y4m_convert_42xpaldv_42xjpeg;
+  } else if (strcmp(_y4m->chroma_type, "422jpeg") == 0) {
+    _y4m->src_c_dec_h = _y4m->dst_c_dec_h = 2;
+    _y4m->src_c_dec_v = 1;
+    _y4m->dst_c_dec_v = 2;
+    _y4m->dst_buf_read_sz = _y4m->pic_w * _y4m->pic_h;
     /*Chroma filter required: read into the aux buf first.*/
-    _y4m->aux_buf_sz=_y4m->aux_buf_read_sz=2*((_y4m->pic_w+1)/2)*_y4m->pic_h;
-    _y4m->convert=y4m_convert_422jpeg_420jpeg;
-  }
-  else if(strcmp(_y4m->chroma_type,"422")==0){
-    _y4m->src_c_dec_h=_y4m->dst_c_dec_h=2;
-    _y4m->src_c_dec_v=1;
-    _y4m->dst_c_dec_v=2;
-    _y4m->dst_buf_read_sz=_y4m->pic_w*_y4m->pic_h;
-    /*Chroma filter required: read into the aux buf first.
-      We need to make two filter passes, so we need some extra space in the
-       aux buffer.*/
-    _y4m->aux_buf_read_sz=2*((_y4m->pic_w+1)/2)*_y4m->pic_h;
-    _y4m->aux_buf_sz=_y4m->aux_buf_read_sz+((_y4m->pic_w+1)/2)*_y4m->pic_h;
-    _y4m->convert=y4m_convert_422_420jpeg;
-  }
-  else if(strcmp(_y4m->chroma_type,"411")==0){
-    _y4m->src_c_dec_h=4;
-    _y4m->dst_c_dec_h=2;
-    _y4m->src_c_dec_v=1;
-    _y4m->dst_c_dec_v=2;
-    _y4m->dst_buf_read_sz=_y4m->pic_w*_y4m->pic_h;
-    /*Chroma filter required: read into the aux buf first.
-      We need to make two filter passes, so we need some extra space in the
-       aux buffer.*/
-    _y4m->aux_buf_read_sz=2*((_y4m->pic_w+3)/4)*_y4m->pic_h;
-    _y4m->aux_buf_sz=_y4m->aux_buf_read_sz+((_y4m->pic_w+1)/2)*_y4m->pic_h;
-    _y4m->convert=y4m_convert_411_420jpeg;
-  }
-  else if(strcmp(_y4m->chroma_type,"444")==0){
-    _y4m->src_c_dec_h=1;
-    _y4m->dst_c_dec_h=2;
-    _y4m->src_c_dec_v=1;
-    _y4m->dst_c_dec_v=2;
-    _y4m->dst_buf_read_sz=_y4m->pic_w*_y4m->pic_h;
-    /*Chroma filter required: read into the aux buf first.
-      We need to make two filter passes, so we need some extra space in the
-       aux buffer.*/
-    _y4m->aux_buf_read_sz=2*_y4m->pic_w*_y4m->pic_h;
-    _y4m->aux_buf_sz=_y4m->aux_buf_read_sz+((_y4m->pic_w+1)/2)*_y4m->pic_h;
-    _y4m->convert=y4m_convert_444_420jpeg;
-  }
-  else if(strcmp(_y4m->chroma_type,"444alpha")==0){
-    _y4m->src_c_dec_h=1;
-    _y4m->dst_c_dec_h=2;
-    _y4m->src_c_dec_v=1;
-    _y4m->dst_c_dec_v=2;
-    _y4m->dst_buf_read_sz=_y4m->pic_w*_y4m->pic_h;
+    _y4m->aux_buf_sz = _y4m->aux_buf_read_sz = 2 * ((_y4m->pic_w + 1) / 2) * _y4m->pic_h;
+    _y4m->convert = y4m_convert_422jpeg_420jpeg;
+  } else if (strcmp(_y4m->chroma_type, "422") == 0) {
+    _y4m->src_c_dec_h = _y4m->dst_c_dec_h = 2;
+    _y4m->src_c_dec_v = 1;
+    _y4m->dst_c_dec_v = 2;
+    _y4m->dst_buf_read_sz = _y4m->pic_w * _y4m->pic_h;
+    /*Chroma filter required: read into the aux buf first.
+      We need to make two filter passes, so we need some extra space in the
+       aux buffer.*/
+    _y4m->aux_buf_read_sz = 2 * ((_y4m->pic_w + 1) / 2) * _y4m->pic_h;
+    _y4m->aux_buf_sz = _y4m->aux_buf_read_sz + ((_y4m->pic_w + 1) / 2) * _y4m->pic_h;
+    _y4m->convert = y4m_convert_422_420jpeg;
+  } else if (strcmp(_y4m->chroma_type, "411") == 0) {
+    _y4m->src_c_dec_h = 4;
+    _y4m->dst_c_dec_h = 2;
+    _y4m->src_c_dec_v = 1;
+    _y4m->dst_c_dec_v = 2;
+    _y4m->dst_buf_read_sz = _y4m->pic_w * _y4m->pic_h;
+    /*Chroma filter required: read into the aux buf first.
+      We need to make two filter passes, so we need some extra space in the
+       aux buffer.*/
+    _y4m->aux_buf_read_sz = 2 * ((_y4m->pic_w + 3) / 4) * _y4m->pic_h;
+    _y4m->aux_buf_sz = _y4m->aux_buf_read_sz + ((_y4m->pic_w + 1) / 2) * _y4m->pic_h;
+    _y4m->convert = y4m_convert_411_420jpeg;
+  } else if (strcmp(_y4m->chroma_type, "444") == 0) {
+    _y4m->src_c_dec_h = 1;
+    _y4m->dst_c_dec_h = 2;
+    _y4m->src_c_dec_v = 1;
+    _y4m->dst_c_dec_v = 2;
+    _y4m->dst_buf_read_sz = _y4m->pic_w * _y4m->pic_h;
+    /*Chroma filter required: read into the aux buf first.
+      We need to make two filter passes, so we need some extra space in the
+       aux buffer.*/
+    _y4m->aux_buf_read_sz = 2 * _y4m->pic_w * _y4m->pic_h;
+    _y4m->aux_buf_sz = _y4m->aux_buf_read_sz + ((_y4m->pic_w + 1) / 2) * _y4m->pic_h;
+    _y4m->convert = y4m_convert_444_420jpeg;
+  } else if (strcmp(_y4m->chroma_type, "444alpha") == 0) {
+    _y4m->src_c_dec_h = 1;
+    _y4m->dst_c_dec_h = 2;
+    _y4m->src_c_dec_v = 1;
+    _y4m->dst_c_dec_v = 2;
+    _y4m->dst_buf_read_sz = _y4m->pic_w * _y4m->pic_h;
     /*Chroma filter required: read into the aux buf first.
       We need to make two filter passes, so we need some extra space in the
        aux buffer.
       The extra plane also gets read into the aux buf.
       It will be discarded.*/
-    _y4m->aux_buf_sz=_y4m->aux_buf_read_sz=3*_y4m->pic_w*_y4m->pic_h;
-    _y4m->convert=y4m_convert_444_420jpeg;
-  }
-  else if(strcmp(_y4m->chroma_type,"mono")==0){
-    _y4m->src_c_dec_h=_y4m->src_c_dec_v=0;
-    _y4m->dst_c_dec_h=_y4m->dst_c_dec_v=2;
-    _y4m->dst_buf_read_sz=_y4m->pic_w*_y4m->pic_h;
+    _y4m->aux_buf_sz = _y4m->aux_buf_read_sz = 3 * _y4m->pic_w * _y4m->pic_h;
+    _y4m->convert = y4m_convert_444_420jpeg;
+  } else if (strcmp(_y4m->chroma_type, "mono") == 0) {
+    _y4m->src_c_dec_h = _y4m->src_c_dec_v = 0;
+    _y4m->dst_c_dec_h = _y4m->dst_c_dec_v = 2;
+    _y4m->dst_buf_read_sz = _y4m->pic_w * _y4m->pic_h;
     /*No extra space required, but we need to clear the chroma planes.*/
-    _y4m->aux_buf_sz=_y4m->aux_buf_read_sz=0;
-    _y4m->convert=y4m_convert_mono_420jpeg;
-  }
-  else{
-    fprintf(stderr,"Unknown chroma sampling type: %s\n",_y4m->chroma_type);
+    _y4m->aux_buf_sz = _y4m->aux_buf_read_sz = 0;
+    _y4m->convert = y4m_convert_mono_420jpeg;
+  } else {
+    fprintf(stderr, "Unknown chroma sampling type: %s\n", _y4m->chroma_type);
     return -1;
   }
   /*The size of the final frame buffers is always computed from the
      destination chroma decimation type.*/
-  _y4m->dst_buf_sz=_y4m->pic_w*_y4m->pic_h
-   +2*((_y4m->pic_w+_y4m->dst_c_dec_h-1)/_y4m->dst_c_dec_h)*
-   ((_y4m->pic_h+_y4m->dst_c_dec_v-1)/_y4m->dst_c_dec_v);
-  _y4m->dst_buf=(unsigned char *)malloc(_y4m->dst_buf_sz);
-  _y4m->aux_buf=(unsigned char *)malloc(_y4m->aux_buf_sz);
+  _y4m->dst_buf_sz = _y4m->pic_w * _y4m->pic_h
+                     + 2 * ((_y4m->pic_w + _y4m->dst_c_dec_h - 1) / _y4m->dst_c_dec_h) *
+                     ((_y4m->pic_h + _y4m->dst_c_dec_v - 1) / _y4m->dst_c_dec_v);
+  _y4m->dst_buf = (unsigned char *)malloc(_y4m->dst_buf_sz);
+  _y4m->aux_buf = (unsigned char *)malloc(_y4m->aux_buf_sz);
   return 0;
 }
 
-void y4m_input_close(y4m_input *_y4m){
+void y4m_input_close(y4m_input *_y4m) {
   free(_y4m->dst_buf);
   free(_y4m->aux_buf);
 }
 
-int y4m_input_fetch_frame(y4m_input *_y4m,FILE *_fin,vpx_image_t *_img){
+int y4m_input_fetch_frame(y4m_input *_y4m, FILE *_fin, vpx_image_t *_img) {
   char frame[6];
   int  pic_sz;
   int  c_w;
   int  c_h;
   int  c_sz;
   int  ret;
   /*Read and skip the frame header.*/
-  ret=(int)fread(frame,1,6,_fin);
-  if(ret<6)return 0;
-  if(memcmp(frame,"FRAME",5)){
-    fprintf(stderr,"Loss of framing in Y4M input data\n");
+  ret = (int)fread(frame, 1, 6, _fin);
+  if (ret < 6)return 0;
+  if (memcmp(frame, "FRAME", 5)) {
+    fprintf(stderr, "Loss of framing in Y4M input data\n");
     return -1;
   }
-  if(frame[5]!='\n'){
+  if (frame[5] != '\n') {
     char c;
     int  j;
-    for(j=0;j<79&&fread(&c,1,1,_fin)&&c!='\n';j++);
-    if(j==79){
-      fprintf(stderr,"Error parsing Y4M frame header\n");
+    for (j = 0; j < 79 && fread(&c, 1, 1, _fin) && c != '\n'; j++);
+    if (j == 79) {
+      fprintf(stderr, "Error parsing Y4M frame header\n");
       return -1;
     }
   }
   /*Read the frame data that needs no conversion.*/
-  if(fread(_y4m->dst_buf,1,_y4m->dst_buf_read_sz,_fin)!=_y4m->dst_buf_read_sz){
-    fprintf(stderr,"Error reading Y4M frame data.\n");
+  if (fread(_y4m->dst_buf, 1, _y4m->dst_buf_read_sz, _fin) != _y4m->dst_buf_read_sz) {
+    fprintf(stderr, "Error reading Y4M frame data.\n");
     return -1;
   }
   /*Read the frame data that does need conversion.*/
-  if(fread(_y4m->aux_buf,1,_y4m->aux_buf_read_sz,_fin)!=_y4m->aux_buf_read_sz){
-    fprintf(stderr,"Error reading Y4M frame data.\n");
+  if (fread(_y4m->aux_buf, 1, _y4m->aux_buf_read_sz, _fin) != _y4m->aux_buf_read_sz) {
+    fprintf(stderr, "Error reading Y4M frame data.\n");
     return -1;
   }
   /*Now convert the just read frame.*/
-  (*_y4m->convert)(_y4m,_y4m->dst_buf,_y4m->aux_buf);
+  (*_y4m->convert)(_y4m, _y4m->dst_buf, _y4m->aux_buf);
   /*Fill in the frame buffer pointers.
     We don't use vpx_img_wrap() because it forces padding for odd picture
      sizes, which would require a separate fread call for every row.*/
-  memset(_img,0,sizeof(*_img));
+  memset(_img, 0, sizeof(*_img));
   /*Y4M has the planes in Y'CbCr order, which libvpx calls Y, U, and V.*/
-  _img->fmt=IMG_FMT_I420;
-  _img->w=_img->d_w=_y4m->pic_w;
-  _img->h=_img->d_h=_y4m->pic_h;
+  _img->fmt = IMG_FMT_I420;
+  _img->w = _img->d_w = _y4m->pic_w;
+  _img->h = _img->d_h = _y4m->pic_h;
   /*This is hard-coded to 4:2:0 for now, as that's all VP8 supports.*/
-  _img->x_chroma_shift=1;
-  _img->y_chroma_shift=1;
-  _img->bps=12;
+  _img->x_chroma_shift = 1;
+  _img->y_chroma_shift = 1;
+  _img->bps = 12;
   /*Set up the buffer pointers.*/
-  pic_sz=_y4m->pic_w*_y4m->pic_h;
-  c_w=(_y4m->pic_w+_y4m->dst_c_dec_h-1)/_y4m->dst_c_dec_h;
-  c_h=(_y4m->pic_h+_y4m->dst_c_dec_v-1)/_y4m->dst_c_dec_v;
-  c_sz=c_w*c_h;
-  _img->stride[PLANE_Y]=_y4m->pic_w;
-  _img->stride[PLANE_U]=_img->stride[PLANE_V]=c_w;
-  _img->planes[PLANE_Y]=_y4m->dst_buf;
-  _img->planes[PLANE_U]=_y4m->dst_buf+pic_sz;
-  _img->planes[PLANE_V]=_y4m->dst_buf+pic_sz+c_sz;
+  pic_sz = _y4m->pic_w * _y4m->pic_h;
+  c_w = (_y4m->pic_w + _y4m->dst_c_dec_h - 1) / _y4m->dst_c_dec_h;
+  c_h = (_y4m->pic_h + _y4m->dst_c_dec_v - 1) / _y4m->dst_c_dec_v;
+  c_sz = c_w * c_h;
+  _img->stride[PLANE_Y] = _y4m->pic_w;
+  _img->stride[PLANE_U] = _img->stride[PLANE_V] = c_w;
+  _img->planes[PLANE_Y] = _y4m->dst_buf;
+  _img->planes[PLANE_U] = _y4m->dst_buf + pic_sz;
+  _img->planes[PLANE_V] = _y4m->dst_buf + pic_sz + c_sz;
   return 1;
 }