1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
|
/*****************************************************************************
* packetizer_helper.h: Packetizer helpers
*****************************************************************************
* Copyright (C) 2014 VLC authors and VideoLAN
* $Id: f8522e8a3da9a93a4132297a7997056590ebe78f $
*
* Authors: Denis Charmet <typx@videolan.org>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
#ifndef MPEG_PARSER_HELPERS_H
#define MPEG_PARSER_HELPERS_H
#include <stdint.h>
#include <vlc_bits.h>
static inline void hevc_skip_profile_tiers_level( bs_t * bs, int32_t max_sub_layer_minus1 )
{
uint8_t sub_layer_profile_present_flag[8];
uint8_t sub_layer_level_present_flag[8];
/* skipping useless fields of the VPS see https://www.itu.int/rec/dologin_pub.asp?lang=e&id=T-REC-H.265-201304-I!!PDF-E&type=item */
bs_skip( bs, 2 + 1 + 5 + 32 + 1 + 1 + 1 + 1 + 44 + 8 );
for( int32_t i = 0; i < max_sub_layer_minus1; i++ )
{
sub_layer_profile_present_flag[i] = bs_read1( bs );
sub_layer_level_present_flag[i] = bs_read1( bs );
}
if(max_sub_layer_minus1 > 0)
bs_skip( bs, (8 - max_sub_layer_minus1) * 2 );
for( int32_t i = 0; i < max_sub_layer_minus1; i++ )
{
if( sub_layer_profile_present_flag[i] )
bs_skip( bs, 2 + 1 + 5 + 32 + 1 + 1 + 1 + 1 + 44 );
if( sub_layer_level_present_flag[i] )
bs_skip( bs, 8 );
}
}
static inline uint32_t read_ue( bs_t * bs )
{
int32_t i = 0;
while( bs_read1( bs ) == 0 && bs->p < bs->p_end && i < 32 )
i++;
return (1 << i) - 1 + bs_read( bs, i );
}
static inline size_t nal_decode(uint8_t * p_src, uint8_t * p_dst, size_t i_size)
{
size_t j = 0;
for (size_t i = 0; i < i_size; i++) {
if (i < i_size - 3 &&
p_src[i] == 0 && p_src[i+1] == 0 && p_src[i+2] == 3) {
p_dst[j++] = 0;
p_dst[j++] = 0;
i += 2;
continue;
}
p_dst[j++] = p_src[i];
}
return j;
}
#endif /*MPEG_PARSER_HELPERS_H*/
|
