/* *  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. */  #include "dboolhuff.h"#include "vpx_ports/mem.h"#include "vpx_mem/vpx_mem.h" int vp8dx_start_decode(BOOL_DECODER *br,                       const unsigned char *source,                       unsigned int source_sz){    br->user_buffer_end = source+source_sz;    br->user_buffer     = source;    br->value    = 0;    br->count    = -8;    br->range    = 255;     if (source_sz && !source)        return 1;     /* Populate the buffer */    vp8dx_bool_decoder_fill(br);     return 0;}  void vp8dx_bool_decoder_fill(BOOL_DECODER *br){    const unsigned char *bufptr;    const unsigned char *bufend;    VP8_BD_VALUE         value;    int                  count;    bufend = br->user_buffer_end;    bufptr = br->user_buffer;    value = br->value;    count = br->count;     VP8DX_BOOL_DECODER_FILL(count, value, bufptr, bufend);     br->user_buffer = bufptr;    br->value = value;    br->count = count;}