Line data    Source code

       1             : /*
       2             :  *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
       3             :  *
       4             :  *  Use of this source code is governed by a BSD-style license
       5             :  *  that can be found in the LICENSE file in the root of the source
       6             :  *  tree. An additional intellectual property rights grant can be found
       7             :  *  in the file PATENTS.  All contributing project authors may
       8             :  *  be found in the AUTHORS file in the root of the source tree.
       9             :  */
      10             : 
      11             : #include <assert.h>
      12             : 
      13             : #include "./bitwriter.h"
      14             : 
      15           0 : void vpx_start_encode(vpx_writer *br, uint8_t *source) {
      16           0 :   br->lowvalue = 0;
      17           0 :   br->range = 255;
      18           0 :   br->count = -24;
      19           0 :   br->buffer = source;
      20           0 :   br->pos = 0;
      21           0 :   vpx_write_bit(br, 0);
      22           0 : }
      23             : 
      24           0 : void vpx_stop_encode(vpx_writer *br) {
      25             :   int i;
      26             : 
      27           0 :   for (i = 0; i < 32; i++) vpx_write_bit(br, 0);
      28             : 
      29             :   // Ensure there's no ambigous collision with any index marker bytes
      30           0 :   if ((br->buffer[br->pos - 1] & 0xe0) == 0xc0) br->buffer[br->pos++] = 0;
      31           0 : }