blob: e25c2db217d861f8d55d32e4cb54454b4cb3b573 (
plain)
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
|
/*
* Copyright (C) 2017-2018 Team Kodi
* This file is part of Kodi - https://kodi.tv
*
* SPDX-License-Identifier: GPL-2.0-or-later
* See LICENSES/README.md for more information.
*/
#pragma once
#include <stdint.h>
class CBitstreamReader
{
public:
CBitstreamReader(const uint8_t *buf, int len);
uint32_t ReadBits(int nbits);
void SkipBits(int nbits);
uint32_t GetBits(int nbits);
unsigned int Position() { return m_posBits; }
unsigned int AvailableBits() { return length * 8 - m_posBits; }
private:
const uint8_t *buffer, *start;
int offbits = 0, length, oflow = 0;
int m_posBits{0};
};
const uint8_t* find_start_code(const uint8_t *p, const uint8_t *end, uint32_t *state);
////////////////////////////////////////////////////////////////////////////////////////////
//! @todo refactor this so as not to need these ffmpeg routines.
//! These are not exposed in ffmpeg's API so we dupe them here.
/*
* AVC helper functions for muxers
* Copyright (c) 2006 Baptiste Coudurier <baptiste.coudurier@smartjog.com>
* This is part of FFmpeg
*
* SPDX-License-Identifier: LGPL-2.1-or-later
* See LICENSES/README.md for more information.
*/
constexpr uint32_t BS_RB24(const uint8_t* x)
{
return (x[0] << 16) | (x[1] << 8) | x[2];
}
constexpr uint32_t BS_RB32(const uint8_t* x)
{
return (x[0] << 24) | (x[1] << 16) | (x[2] << 8) | x[3];
}
|
