mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-24 10:41:04 +00:00
69 lines
2 KiB
C
69 lines
2 KiB
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 dboolhuff.LICENSE file in this directory.
|
||
|
|
* See the libvpx original distribution for more information,
|
||
|
|
* including patent information, and author information.
|
||
|
|
*/
|
||
|
|
|
||
|
|
|
||
|
|
#include "dboolhuff.h"
|
||
|
|
|
||
|
|
const unsigned char vp8_norm[256] __attribute__ ((aligned (16))) = {
|
||
|
|
0, 7, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4,
|
||
|
|
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
|
||
|
|
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
|
||
|
|
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
|
||
|
|
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
|
||
|
|
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
|
||
|
|
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
|
||
|
|
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
|
||
|
|
|
||
|
|
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;
|
||
|
|
}
|