blob: a956e9765833fbe70fae51aff369930679907e12 (
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
|
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "media/base/bit_reader.h"
namespace media {
BitReader::BitReader(const uint8_t* data, int size)
: initial_size_(size),
data_(data),
bytes_left_(size),
bit_reader_core_(this) {
DCHECK(data != NULL);
DCHECK_GE(size, 0);
}
BitReader::~BitReader() = default;
bool BitReader::ReadString(int num_bits, std::string* str) {
DCHECK_EQ(num_bits % 8, 0);
DCHECK_GT(num_bits, 0);
DCHECK(str);
int num_bytes = num_bits / 8;
str->resize(num_bytes);
char* ptr = &str->front();
while (num_bytes--) {
if (!ReadBits(8, ptr++))
return false;
}
return true;
}
int BitReader::GetBytes(int max_nbytes, const uint8_t** out) {
DCHECK_GE(max_nbytes, 0);
DCHECK(out);
int nbytes = max_nbytes;
if (nbytes > bytes_left_)
nbytes = bytes_left_;
*out = data_;
data_ += nbytes;
bytes_left_ -= nbytes;
return nbytes;
}
} // namespace media
|
