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Side by Side Diff: media/filters/h264_bitstream_buffer.cc

Issue 1534273002: Switch to standard integer types in media/. (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: more Created 5 years ago
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1 // Copyright 2014 The Chromium Authors. All rights reserved. 1 // Copyright 2014 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #include "media/filters/h264_bitstream_buffer.h" 5 #include "media/filters/h264_bitstream_buffer.h"
6 6
7 #include "base/sys_byteorder.h" 7 #include "base/sys_byteorder.h"
8 8
9 namespace media { 9 namespace media {
10 10
(...skipping 13 matching lines...) Expand all
24 capacity_ = 0; 24 capacity_ = 0;
25 pos_ = 0; 25 pos_ = 0;
26 reg_ = 0; 26 reg_ = 0;
27 27
28 Grow(); 28 Grow();
29 29
30 bits_left_in_reg_ = kRegBitSize; 30 bits_left_in_reg_ = kRegBitSize;
31 } 31 }
32 32
33 void H264BitstreamBuffer::Grow() { 33 void H264BitstreamBuffer::Grow() {
34 data_ = static_cast<uint8*>(realloc(data_, capacity_ + kGrowBytes)); 34 data_ = static_cast<uint8_t*>(realloc(data_, capacity_ + kGrowBytes));
35 CHECK(data_) << "Failed growing the buffer"; 35 CHECK(data_) << "Failed growing the buffer";
36 capacity_ += kGrowBytes; 36 capacity_ += kGrowBytes;
37 } 37 }
38 38
39 void H264BitstreamBuffer::FlushReg() { 39 void H264BitstreamBuffer::FlushReg() {
40 // Flush all bytes that have at least one bit cached, but not more 40 // Flush all bytes that have at least one bit cached, but not more
41 // (on Flush(), reg_ may not be full). 41 // (on Flush(), reg_ may not be full).
42 size_t bits_in_reg = kRegBitSize - bits_left_in_reg_; 42 size_t bits_in_reg = kRegBitSize - bits_left_in_reg_;
43 if (bits_in_reg == 0) 43 if (bits_in_reg == 0)
44 return; 44 return;
45 45
46 size_t bytes_in_reg = (bits_in_reg + 7) / 8; 46 size_t bytes_in_reg = (bits_in_reg + 7) / 8;
47 reg_ <<= (kRegBitSize - bits_in_reg); 47 reg_ <<= (kRegBitSize - bits_in_reg);
48 48
49 // Convert to MSB and append as such to the stream. 49 // Convert to MSB and append as such to the stream.
50 reg_ = base::HostToNet64(reg_); 50 reg_ = base::HostToNet64(reg_);
51 51
52 // Make sure we have enough space. Grow() will CHECK() on allocation failure. 52 // Make sure we have enough space. Grow() will CHECK() on allocation failure.
53 if (pos_ + bytes_in_reg < capacity_) 53 if (pos_ + bytes_in_reg < capacity_)
54 Grow(); 54 Grow();
55 55
56 memcpy(data_ + pos_, &reg_, bytes_in_reg); 56 memcpy(data_ + pos_, &reg_, bytes_in_reg);
57 pos_ += bytes_in_reg; 57 pos_ += bytes_in_reg;
58 58
59 reg_ = 0; 59 reg_ = 0;
60 bits_left_in_reg_ = kRegBitSize; 60 bits_left_in_reg_ = kRegBitSize;
61 } 61 }
62 62
63 void H264BitstreamBuffer::AppendU64(size_t num_bits, uint64 val) { 63 void H264BitstreamBuffer::AppendU64(size_t num_bits, uint64_t val) {
64 CHECK_LE(num_bits, kRegBitSize); 64 CHECK_LE(num_bits, kRegBitSize);
65 65
66 while (num_bits > 0) { 66 while (num_bits > 0) {
67 if (bits_left_in_reg_ == 0) 67 if (bits_left_in_reg_ == 0)
68 FlushReg(); 68 FlushReg();
69 69
70 uint64 bits_to_write = 70 uint64_t bits_to_write =
71 num_bits > bits_left_in_reg_ ? bits_left_in_reg_ : num_bits; 71 num_bits > bits_left_in_reg_ ? bits_left_in_reg_ : num_bits;
72 uint64 val_to_write = (val >> (num_bits - bits_to_write)); 72 uint64_t val_to_write = (val >> (num_bits - bits_to_write));
73 if (bits_to_write < 64) 73 if (bits_to_write < 64)
74 val_to_write &= ((1ull << bits_to_write) - 1); 74 val_to_write &= ((1ull << bits_to_write) - 1);
75 reg_ <<= bits_to_write; 75 reg_ <<= bits_to_write;
76 reg_ |= val_to_write; 76 reg_ |= val_to_write;
77 num_bits -= bits_to_write; 77 num_bits -= bits_to_write;
78 bits_left_in_reg_ -= bits_to_write; 78 bits_left_in_reg_ -= bits_to_write;
79 } 79 }
80 } 80 }
81 81
82 void H264BitstreamBuffer::AppendBool(bool val) { 82 void H264BitstreamBuffer::AppendBool(bool val) {
83 if (bits_left_in_reg_ == 0) 83 if (bits_left_in_reg_ == 0)
84 FlushReg(); 84 FlushReg();
85 85
86 reg_ <<= 1; 86 reg_ <<= 1;
87 reg_ |= (static_cast<uint64>(val) & 1); 87 reg_ |= (static_cast<uint64_t>(val) & 1);
88 --bits_left_in_reg_; 88 --bits_left_in_reg_;
89 } 89 }
90 90
91 void H264BitstreamBuffer::AppendSE(int val) { 91 void H264BitstreamBuffer::AppendSE(int val) {
92 if (val > 0) 92 if (val > 0)
93 AppendUE(val * 2 - 1); 93 AppendUE(val * 2 - 1);
94 else 94 else
95 AppendUE(-val * 2); 95 AppendUE(-val * 2);
96 } 96 }
97 97
(...skipping 37 matching lines...) Expand 10 before | Expand all | Expand 10 after
135 135
136 if (bits_left_in_reg_ != kRegBitSize) 136 if (bits_left_in_reg_ != kRegBitSize)
137 FlushReg(); 137 FlushReg();
138 } 138 }
139 139
140 size_t H264BitstreamBuffer::BytesInBuffer() { 140 size_t H264BitstreamBuffer::BytesInBuffer() {
141 DCHECK_FINISHED(); 141 DCHECK_FINISHED();
142 return pos_; 142 return pos_;
143 } 143 }
144 144
145 uint8* H264BitstreamBuffer::data() { 145 uint8_t* H264BitstreamBuffer::data() {
146 DCHECK(data_); 146 DCHECK(data_);
147 DCHECK_FINISHED(); 147 DCHECK_FINISHED();
148 148
149 return data_; 149 return data_;
150 } 150 }
151 151
152 } // namespace media 152 } // namespace media
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