libvpx: Add VP9 decoder.

source/libvpx/libmkv/EbmlBufferWriter.c

Index: source/libvpx/libmkv/EbmlBufferWriter.c
===================================================================
--- source/libvpx/libmkv/EbmlBufferWriter.c	(revision 172621)
+++ source/libvpx/libmkv/EbmlBufferWriter.c	(working copy)
@@ -1,60 +1,54 @@
-//#include <strmif.h>
+// #include <strmif.h>
 #include "EbmlBufferWriter.h"
 #include "EbmlWriter.h"
-//#include <cassert>
-//#include <limits>
-//#include <malloc.h>  //_alloca
+// #include <cassert>
+// #include <limits>
+// #include <malloc.h>  //_alloca
 #include <stdlib.h>
 #include <wchar.h>
 #include <string.h>
 
-void Ebml_Write(EbmlGlobal *glob, const void *buffer_in, unsigned long len)
-{
-    unsigned char *src = glob->buf;
-    src += glob->offset;
-    memcpy(src, buffer_in, len);
-    glob->offset += len;
+void Ebml_Write(EbmlGlobal *glob, const void *buffer_in, unsigned long len) {
+  unsigned char *src = glob->buf;
+  src += glob->offset;
+  memcpy(src, buffer_in, len);
+  glob->offset += len;
 }
 
-static void _Serialize(EbmlGlobal *glob, const unsigned char *p, const unsigned char *q)
-{
-    while (q != p)
-    {
-        --q;
+static void _Serialize(EbmlGlobal *glob, const unsigned char *p, const unsigned char *q) {
+  while (q != p) {
+    --q;
 
-        unsigned long cbWritten;
-        memcpy(&(glob->buf[glob->offset]), q, 1);
-        glob->offset ++;
-    }
+    unsigned long cbWritten;
+    memcpy(&(glob->buf[glob->offset]), q, 1);
+    glob->offset++;
+  }
 }
 
-void Ebml_Serialize(EbmlGlobal *glob, const void *buffer_in, unsigned long len)
-{
-    //assert(buf);
+void Ebml_Serialize(EbmlGlobal *glob, const void *buffer_in, unsigned long len) {
+  // assert(buf);
 
-    const unsigned char *const p = (const unsigned char *)(buffer_in);
-    const unsigned char *const q = p + len;
+  const unsigned char *const p = (const unsigned char *)(buffer_in);
+  const unsigned char *const q = p + len;
 
-    _Serialize(glob, p, q);
+  _Serialize(glob, p, q);
 }
 
 
-void Ebml_StartSubElement(EbmlGlobal *glob, EbmlLoc *ebmlLoc, unsigned long class_id)
-{
-    Ebml_WriteID(glob, class_id);
-    ebmlLoc->offset = glob->offset;
-    //todo this is always taking 8 bytes, this may need later optimization
-    unsigned long long unknownLen =  0x01FFFFFFFFFFFFFFLLU;
-    Ebml_Serialize(glob, (void *)&unknownLen, 8); //this is a key that says lenght unknown
+void Ebml_StartSubElement(EbmlGlobal *glob, EbmlLoc *ebmlLoc, unsigned long class_id) {
+  Ebml_WriteID(glob, class_id);
+  ebmlLoc->offset = glob->offset;
+  // todo this is always taking 8 bytes, this may need later optimization
+  unsigned long long unknownLen =  0x01FFFFFFFFFFFFFFLLU;
+  Ebml_Serialize(glob, (void *)&unknownLen, 8); // this is a key that says lenght unknown
 }
 
-void Ebml_EndSubElement(EbmlGlobal *glob, EbmlLoc *ebmlLoc)
-{
-    unsigned long long size = glob->offset - ebmlLoc->offset - 8;
-    unsigned long long curOffset = glob->offset;
-    glob->offset = ebmlLoc->offset;
-    size |=  0x0100000000000000LLU;
-    Ebml_Serialize(glob, &size, 8);
-    glob->offset = curOffset;
+void Ebml_EndSubElement(EbmlGlobal *glob, EbmlLoc *ebmlLoc) {
+  unsigned long long size = glob->offset - ebmlLoc->offset - 8;
+  unsigned long long curOffset = glob->offset;
+  glob->offset = ebmlLoc->offset;
+  size |=  0x0100000000000000LLU;
+  Ebml_Serialize(glob, &size, 8);
+  glob->offset = curOffset;
 }