| /* |
| * 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; |
| } |