Chromium Code Reviews
chromiumcodereview-hr@appspot.gserviceaccount.com (chromiumcodereview-hr) | Please choose your nickname with Settings | Help | Chromium Project | Gerrit Changes | Sign out
(1131)

Side by Side Diff: media/formats/mp4/box_reader.h

Issue 1499423004: Remove kint32max. (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@kint9
Patch Set: rebase Created 5 years ago
Use n/p to move between diff chunks; N/P to move between comments. Draft comments are only viewable by you.
Jump to:
View unified diff | Download patch
« no previous file with comments | « media/capture/video/mac/video_capture_device_mac.mm ('k') | media/formats/mp4/box_reader.cc » ('j') | no next file with comments »
Toggle Intra-line Diffs ('i') | Expand Comments ('e') | Collapse Comments ('c') | Show Comments Hide Comments ('s')
OLDNEW
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 #ifndef MEDIA_FORMATS_MP4_BOX_READER_H_ 5 #ifndef MEDIA_FORMATS_MP4_BOX_READER_H_
6 #define MEDIA_FORMATS_MP4_BOX_READER_H_ 6 #define MEDIA_FORMATS_MP4_BOX_READER_H_
7 7
8 #include <stdint.h>
9
10 #include <limits>
8 #include <map> 11 #include <map>
9 #include <vector> 12 #include <vector>
10 13
11 #include "base/compiler_specific.h" 14 #include "base/compiler_specific.h"
12 #include "base/logging.h" 15 #include "base/logging.h"
13 #include "base/numerics/safe_conversions.h" 16 #include "base/numerics/safe_conversions.h"
14 #include "media/base/media_export.h" 17 #include "media/base/media_export.h"
15 #include "media/base/media_log.h" 18 #include "media/base/media_log.h"
16 #include "media/formats/mp4/fourccs.h" 19 #include "media/formats/mp4/fourccs.h"
17 #include "media/formats/mp4/rcheck.h" 20 #include "media/formats/mp4/rcheck.h"
18 21
19 namespace media { 22 namespace media {
20 namespace mp4 { 23 namespace mp4 {
21 24
22 class BoxReader; 25 class BoxReader;
23 26
24 struct MEDIA_EXPORT Box { 27 struct MEDIA_EXPORT Box {
25 virtual ~Box(); 28 virtual ~Box();
26 29
27 // Parse errors may be logged using the BoxReader's media log. 30 // Parse errors may be logged using the BoxReader's media log.
28 virtual bool Parse(BoxReader* reader) = 0; 31 virtual bool Parse(BoxReader* reader) = 0;
29 32
30 virtual FourCC BoxType() const = 0; 33 virtual FourCC BoxType() const = 0;
31 }; 34 };
32 35
33 class MEDIA_EXPORT BufferReader { 36 class MEDIA_EXPORT BufferReader {
34 public: 37 public:
35 BufferReader(const uint8* buf, const int size) : buf_(buf), pos_(0) { 38 BufferReader(const uint8_t* buf, const int size) : buf_(buf), pos_(0) {
36 CHECK(buf); 39 CHECK(buf);
37 size_ = base::checked_cast<uint64>(size); 40 size_ = base::checked_cast<uint64_t>(size);
38 } 41 }
39 42
40 bool HasBytes(uint64 count) { 43 bool HasBytes(uint64_t count) {
41 // As the size of a box is implementation limited to 2^31, fail if 44 // As the size of a box is implementation limited to 2^31, fail if
42 // attempting to check for too many bytes. 45 // attempting to check for too many bytes.
43 return (pos_ <= size_ && count < static_cast<uint64>(kint32max) && 46 return (pos_ <= size_ &&
47 count <
48 static_cast<uint64_t>(std::numeric_limits<int32_t>::max()) &&
44 size_ - pos_ >= count); 49 size_ - pos_ >= count);
45 } 50 }
46 51
47 // Read a value from the stream, perfoming endian correction, and advance the 52 // Read a value from the stream, perfoming endian correction, and advance the
48 // stream pointer. 53 // stream pointer.
49 bool Read1(uint8* v) WARN_UNUSED_RESULT; 54 bool Read1(uint8_t* v) WARN_UNUSED_RESULT;
50 bool Read2(uint16* v) WARN_UNUSED_RESULT; 55 bool Read2(uint16_t* v) WARN_UNUSED_RESULT;
51 bool Read2s(int16* v) WARN_UNUSED_RESULT; 56 bool Read2s(int16_t* v) WARN_UNUSED_RESULT;
52 bool Read4(uint32* v) WARN_UNUSED_RESULT; 57 bool Read4(uint32_t* v) WARN_UNUSED_RESULT;
53 bool Read4s(int32* v) WARN_UNUSED_RESULT; 58 bool Read4s(int32_t* v) WARN_UNUSED_RESULT;
54 bool Read8(uint64* v) WARN_UNUSED_RESULT; 59 bool Read8(uint64_t* v) WARN_UNUSED_RESULT;
55 bool Read8s(int64* v) WARN_UNUSED_RESULT; 60 bool Read8s(int64_t* v) WARN_UNUSED_RESULT;
56 61
57 bool ReadFourCC(FourCC* v) WARN_UNUSED_RESULT; 62 bool ReadFourCC(FourCC* v) WARN_UNUSED_RESULT;
58 63
59 bool ReadVec(std::vector<uint8>* t, uint64 count) WARN_UNUSED_RESULT; 64 bool ReadVec(std::vector<uint8_t>* t, uint64_t count) WARN_UNUSED_RESULT;
60 65
61 // These variants read a 4-byte integer of the corresponding signedness and 66 // These variants read a 4-byte integer of the corresponding signedness and
62 // store it in the 8-byte return type. 67 // store it in the 8-byte return type.
63 bool Read4Into8(uint64* v) WARN_UNUSED_RESULT; 68 bool Read4Into8(uint64_t* v) WARN_UNUSED_RESULT;
64 bool Read4sInto8s(int64* v) WARN_UNUSED_RESULT; 69 bool Read4sInto8s(int64_t* v) WARN_UNUSED_RESULT;
65 70
66 // Advance the stream by this many bytes. 71 // Advance the stream by this many bytes.
67 bool SkipBytes(uint64 nbytes) WARN_UNUSED_RESULT; 72 bool SkipBytes(uint64_t nbytes) WARN_UNUSED_RESULT;
68 73
69 const uint8* data() const { return buf_; } 74 const uint8_t* data() const { return buf_; }
70 75
71 // This returns the size of the box as specified in the box header. Initially 76 // This returns the size of the box as specified in the box header. Initially
72 // it is the buffer size until the header is read. Note that the size 77 // it is the buffer size until the header is read. Note that the size
73 // specified in the box header may be different than the number of bytes 78 // specified in the box header may be different than the number of bytes
74 // actually provided. 79 // actually provided.
75 uint64 size() const { return size_; } 80 uint64_t size() const { return size_; }
76 uint64 pos() const { return pos_; } 81 uint64_t pos() const { return pos_; }
77 82
78 protected: 83 protected:
79 const uint8* buf_; 84 const uint8_t* buf_;
80 uint64 size_; 85 uint64_t size_;
81 uint64 pos_; 86 uint64_t pos_;
82 87
83 template<typename T> bool Read(T* t) WARN_UNUSED_RESULT; 88 template<typename T> bool Read(T* t) WARN_UNUSED_RESULT;
84 }; 89 };
85 90
86 class MEDIA_EXPORT BoxReader : public BufferReader { 91 class MEDIA_EXPORT BoxReader : public BufferReader {
87 public: 92 public:
88 ~BoxReader(); 93 ~BoxReader();
89 94
90 // Create a BoxReader from a buffer. Note that this function may return NULL 95 // Create a BoxReader from a buffer. Note that this function may return NULL
91 // if an intact, complete box was not available in the buffer. If |*err| is 96 // if an intact, complete box was not available in the buffer. If |*err| is
92 // set, there was a stream-level error when creating the box; otherwise, NULL 97 // set, there was a stream-level error when creating the box; otherwise, NULL
93 // values are only expected when insufficient data is available. 98 // values are only expected when insufficient data is available.
94 // 99 //
95 // |buf| is retained but not owned, and must outlive the BoxReader instance. 100 // |buf| is retained but not owned, and must outlive the BoxReader instance.
96 static BoxReader* ReadTopLevelBox(const uint8* buf, 101 static BoxReader* ReadTopLevelBox(const uint8_t* buf,
97 const int buf_size, 102 const int buf_size,
98 const scoped_refptr<MediaLog>& media_log, 103 const scoped_refptr<MediaLog>& media_log,
99 bool* err); 104 bool* err);
100 105
101 // Read the box header from the current buffer. This function returns true if 106 // Read the box header from the current buffer. This function returns true if
102 // there is enough data to read the header and the header is sane; that is, it 107 // there is enough data to read the header and the header is sane; that is, it
103 // does not check to ensure the entire box is in the buffer before returning 108 // does not check to ensure the entire box is in the buffer before returning
104 // true. The semantics of |*err| are the same as above. 109 // true. The semantics of |*err| are the same as above.
105 // 110 //
106 // |buf| is not retained. 111 // |buf| is not retained.
107 static bool StartTopLevelBox(const uint8* buf, 112 static bool StartTopLevelBox(const uint8_t* buf,
108 const int buf_size, 113 const int buf_size,
109 const scoped_refptr<MediaLog>& media_log, 114 const scoped_refptr<MediaLog>& media_log,
110 FourCC* type, 115 FourCC* type,
111 int* box_size, 116 int* box_size,
112 bool* err) WARN_UNUSED_RESULT; 117 bool* err) WARN_UNUSED_RESULT;
113 118
114 // Create a BoxReader from a buffer. |buf| must be the complete buffer, as 119 // Create a BoxReader from a buffer. |buf| must be the complete buffer, as
115 // errors are returned when sufficient data is not available. |buf| can start 120 // errors are returned when sufficient data is not available. |buf| can start
116 // with any type of box -- it does not have to be IsValidTopLevelBox(). 121 // with any type of box -- it does not have to be IsValidTopLevelBox().
117 // 122 //
118 // |buf| is retained but not owned, and must outlive the BoxReader instance. 123 // |buf| is retained but not owned, and must outlive the BoxReader instance.
119 static BoxReader* ReadConcatentatedBoxes(const uint8* buf, 124 static BoxReader* ReadConcatentatedBoxes(const uint8_t* buf,
120 const int buf_size); 125 const int buf_size);
121 126
122 // Returns true if |type| is recognized to be a top-level box, false 127 // Returns true if |type| is recognized to be a top-level box, false
123 // otherwise. This returns true for some boxes which we do not parse. 128 // otherwise. This returns true for some boxes which we do not parse.
124 // Helpful in debugging misaligned appends. 129 // Helpful in debugging misaligned appends.
125 static bool IsValidTopLevelBox(const FourCC& type, 130 static bool IsValidTopLevelBox(const FourCC& type,
126 const scoped_refptr<MediaLog>& media_log); 131 const scoped_refptr<MediaLog>& media_log);
127 132
128 // Scan through all boxes within the current box, starting at the current 133 // Scan through all boxes within the current box, starting at the current
129 // buffer position. Must be called before any of the *Child functions work. 134 // buffer position. Must be called before any of the *Child functions work.
(...skipping 32 matching lines...) Expand 10 before | Expand all | Expand 10 after
162 template <typename T> 167 template <typename T>
163 bool ReadAllChildrenAndCheckFourCC(std::vector<T>* children) 168 bool ReadAllChildrenAndCheckFourCC(std::vector<T>* children)
164 WARN_UNUSED_RESULT; 169 WARN_UNUSED_RESULT;
165 170
166 // Populate the values of 'version()' and 'flags()' from a full box header. 171 // Populate the values of 'version()' and 'flags()' from a full box header.
167 // Many boxes, but not all, use these values. This call should happen after 172 // Many boxes, but not all, use these values. This call should happen after
168 // the box has been initialized, and does not re-read the main box header. 173 // the box has been initialized, and does not re-read the main box header.
169 bool ReadFullBoxHeader() WARN_UNUSED_RESULT; 174 bool ReadFullBoxHeader() WARN_UNUSED_RESULT;
170 175
171 FourCC type() const { return type_; } 176 FourCC type() const { return type_; }
172 uint8 version() const { return version_; } 177 uint8_t version() const { return version_; }
173 uint32 flags() const { return flags_; } 178 uint32_t flags() const { return flags_; }
174 179
175 const scoped_refptr<MediaLog>& media_log() const { return media_log_; } 180 const scoped_refptr<MediaLog>& media_log() const { return media_log_; }
176 181
177 private: 182 private:
178 // Create a BoxReader from |buf|. |is_EOS| should be true if |buf| is 183 // Create a BoxReader from |buf|. |is_EOS| should be true if |buf| is
179 // complete stream (i.e. no additional data is expected to be appended). 184 // complete stream (i.e. no additional data is expected to be appended).
180 BoxReader(const uint8* buf, 185 BoxReader(const uint8_t* buf,
181 const int size, 186 const int size,
182 const scoped_refptr<MediaLog>& media_log, 187 const scoped_refptr<MediaLog>& media_log,
183 bool is_EOS); 188 bool is_EOS);
184 189
185 // Must be called immediately after init. If the return is false, this 190 // Must be called immediately after init. If the return is false, this
186 // indicates that the box header and its contents were not available in the 191 // indicates that the box header and its contents were not available in the
187 // stream or were nonsensical, and that the box must not be used further. In 192 // stream or were nonsensical, and that the box must not be used further. In
188 // this case, if |*err| is false, the problem was simply a lack of data, and 193 // this case, if |*err| is false, the problem was simply a lack of data, and
189 // should only be an error condition if some higher-level component knows that 194 // should only be an error condition if some higher-level component knows that
190 // no more data is coming (i.e. EOS or end of containing box). If |*err| is 195 // no more data is coming (i.e. EOS or end of containing box). If |*err| is
191 // true, the error is unrecoverable and the stream should be aborted. 196 // true, the error is unrecoverable and the stream should be aborted.
192 bool ReadHeader(bool* err); 197 bool ReadHeader(bool* err);
193 198
194 // Read all children, optionally checking FourCC. Returns true if all 199 // Read all children, optionally checking FourCC. Returns true if all
195 // children are successfully parsed and, if |check_box_type|, have the 200 // children are successfully parsed and, if |check_box_type|, have the
196 // correct box type for |T|. Note that this method is mutually exclusive 201 // correct box type for |T|. Note that this method is mutually exclusive
197 // with ScanChildren(). 202 // with ScanChildren().
198 template <typename T> 203 template <typename T>
199 bool ReadAllChildrenInternal(std::vector<T>* children, bool check_box_type); 204 bool ReadAllChildrenInternal(std::vector<T>* children, bool check_box_type);
200 205
201 scoped_refptr<MediaLog> media_log_; 206 scoped_refptr<MediaLog> media_log_;
202 FourCC type_; 207 FourCC type_;
203 uint8 version_; 208 uint8_t version_;
204 uint32 flags_; 209 uint32_t flags_;
205 210
206 typedef std::multimap<FourCC, BoxReader> ChildMap; 211 typedef std::multimap<FourCC, BoxReader> ChildMap;
207 212
208 // The set of child box FourCCs and their corresponding buffer readers. Only 213 // The set of child box FourCCs and their corresponding buffer readers. Only
209 // valid if scanned_ is true. 214 // valid if scanned_ is true.
210 ChildMap children_; 215 ChildMap children_;
211 bool scanned_; 216 bool scanned_;
212 217
213 // True if the buffer provided to the reader is the complete stream. 218 // True if the buffer provided to the reader is the complete stream.
214 const bool is_EOS_; 219 const bool is_EOS_;
(...skipping 55 matching lines...) Expand 10 before | Expand all | Expand 10 after
270 pos_ += child_reader.size(); 275 pos_ += child_reader.size();
271 } 276 }
272 277
273 return !err; 278 return !err;
274 } 279 }
275 280
276 } // namespace mp4 281 } // namespace mp4
277 } // namespace media 282 } // namespace media
278 283
279 #endif // MEDIA_FORMATS_MP4_BOX_READER_H_ 284 #endif // MEDIA_FORMATS_MP4_BOX_READER_H_
OLDNEW
« no previous file with comments | « media/capture/video/mac/video_capture_device_mac.mm ('k') | media/formats/mp4/box_reader.cc » ('j') | no next file with comments »

Powered by Google App Engine
This is Rietveld 408576698