2 Copyright (C) 2018-2021 Carl Hetherington <cth@carlh.net>
4 This file is part of libdcp.
6 libdcp is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 libdcp is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with libdcp. If not, see <http://www.gnu.org/licenses/>.
19 In addition, as a special exception, the copyright holders give
20 permission to link the code of portions of this program with the
21 OpenSSL library under certain conditions as described in each
22 individual source file, and distribute linked combinations
25 You must obey the GNU General Public License in all respects
26 for all of the code used other than OpenSSL. If you modify
27 file(s) with this exception, you may extend this exception to your
28 version of the file(s), but you are not obligated to do so. If you
29 do not wish to do so, delete this exception statement from your
30 version. If you delete this exception statement from all source
31 files in the program, then also delete it here.
35 /** @file src/verify.h
36 * @brief dcp::verify() method and associated code
40 #ifndef LIBDCP_VERIFY_H
41 #define LIBDCP_VERIFY_H
44 #include "decrypted_kdm.h"
45 #include <boost/any.hpp>
46 #include <boost/filesystem.hpp>
47 #include <boost/function.hpp>
48 #include <boost/optional.hpp>
54 /* windows.h defines this but we want to use it */
64 class VerificationNote
70 BV21_ERROR, ///< may not always be considered an error, but violates a "shall" requirement of Bv2.1
74 /** Codes for successful checks, errors or warnings from verifying DCPs.
76 * The names should (in general) answer the question "what is wrong?" with an answer that begins "There is a ..."
77 * e.g. "There is a INCORRECT_CPL_HASH"
78 * "There is a MISSING_ASSET"
80 * In general the pattern should be <negative-adjective> <noun>.
81 * Some <negative-adjective>s are:
83 * - INCORRECT: something, which could have any value, is wrong.
84 * - INVALID: something, which should only be one of a set of values, is not in the set, or some preformatted
85 * quantity (e.g. XML) is in the wrong format.
86 * - MISMATCHED: two things, which should be the same, are not.
87 * - EMPTY: something, which should have a value, has no value.
88 * - MISSING: something, which should be present, is not.
89 * - UNEXPECTED: something, which is present, should not be.
90 * - FAILED: some part of the verification failed in some serious way.
92 * Comments should clarify meaning and also say which of the optional fields (e.g. file)
93 * are filled in when this code is used.
96 // If you change the next line, also look in doc/manual/verifier.py in DCP-o-matic
97 // as it looks for it when compiling the manual. Also, in this enum:
98 // [...] will be taken as a reference to a section of Bv2.1
99 // _foo_ means foo should be written as a piece of code
101 /** A general error when reading the DCP
102 * note contains (probably technical) details
105 /** The hash of the CPL in the PKL does not agree with the CPL file
106 * note contains CPL ID
107 * file contains CPL filename
108 * calculated_hash contains current hash of the CPL
109 * reference_hash contains the hash written in the PKL
111 MISMATCHED_CPL_HASHES,
112 /** The frame rate given in a reel for the main picture is not 24, 25, 30, 48, 50 or 60
113 * note contains the invalid frame rate as "<numerator>/<denominator>"
115 INVALID_PICTURE_FRAME_RATE,
116 /** The hash of a main picture asset does not agree with the PKL file
117 * file contains the picture asset filename
118 * calculated_hash contains the current hash of the picture MXF
119 * reference_hash contains the hash from the PKL
121 INCORRECT_PICTURE_HASH,
122 /** The hash of a main picture is different in the CPL and PKL
123 * file contains the picture asset filename
125 MISMATCHED_PICTURE_HASHES,
126 /** The hash of a main sound asset does not agree with the PKL file
127 * file contains the sound asset filename
128 * calculated_hash contains the current hash of the picture MXF
129 * reference_hash contains the hash from the PKL
131 INCORRECT_SOUND_HASH,
132 /** The hash of a main sound is different in the CPL and PKL
133 * file contains the sound asset filename
135 MISMATCHED_SOUND_HASHES,
136 /** An assetmap's _<Path>_ entry is empty */
138 /** A file mentioned in an asset map cannot be found
139 * file contains the filename that is missing
142 /** The DCP contains both SMPTE and Interop-standard components */
144 /** Some XML fails to validate against its XSD/DTD
145 * note contains the (probably technical) details
146 * file contains the invalid filename
147 * line contains the line number
150 /** No _ASSETMAP_ or _ASSETMAP.xml_ was found */
152 /** An asset's _IntrinsicDuration_ is less than 1 second
153 * note contains asset ID
155 INVALID_INTRINSIC_DURATION,
156 /** An asset's _Duration_ is less than 1 second
157 * note contains asset ID
160 /** The JPEG2000 data in at least one picture frame is larger than the equivalent of 250Mbit/s
161 * file contains the picture asset filename
163 INVALID_PICTURE_FRAME_SIZE_IN_BYTES,
164 /** The JPEG2000 data in at least one picture frame is larger than the equivalent of 230Mbit/s
165 * file contains the picture asset filename
167 NEARLY_INVALID_PICTURE_FRAME_SIZE_IN_BYTES,
168 /** An asset that the CPL requires is not in this DCP; the DCP may be a VF
169 * note contains the asset ID
172 /** A stereoscopic asset has an MXF which is marked as being monoscopic
173 * file contains the asset filename
175 THREED_ASSET_MARKED_AS_TWOD,
176 /** DCP is Interop, not SMPTE [Bv2.1_6.1] */
178 /** A language or territory does not conform to RFC 5646 [Bv2.1_6.2.1]
179 * note contains the invalid language
182 /** A picture asset does not have one of the required Bv2.1 sizes (in pixels) [Bv2.1_7.1]
183 * note contains the incorrect size as "<width>x<height>"
184 * file contains the asset filename
186 INVALID_PICTURE_SIZE_IN_PIXELS,
187 /** A picture asset is 2K but is not at 24, 25 or 48 fps as required by Bv2.1 [Bv2.1_7.1]
188 * note contains the invalid frame rate as "<numerator>/<denominator>"
189 * file contains the asset filename
191 INVALID_PICTURE_FRAME_RATE_FOR_2K,
192 /** A picture asset is 4K but is not at 24fps as required by Bv2.1 [Bv2.1_7.1]
193 * note contains the invalid frame rate as "<numerator>/<denominator>"
194 * file contains the asset filename
196 INVALID_PICTURE_FRAME_RATE_FOR_4K,
197 /** A picture asset is 4K but is 3D which is not allowed by Bv2.1 [Bv2.1_7.1]
198 * note contains the invalid frame rate as "<numerator>/<denominator>"
199 * file contains the asset filename
201 INVALID_PICTURE_ASSET_RESOLUTION_FOR_3D,
202 /** A closed caption's XML file is larger than 256KB [Bv2.1_7.2.1]
203 * note contains the invalid size in bytes
204 * file contains the asset filename
206 INVALID_CLOSED_CAPTION_XML_SIZE_IN_BYTES,
207 /** Any timed text asset's total files is larger than 115MB [Bv2.1_7.2.1]
208 * note contains the invalid size in bytes
209 * file contains the asset filename
211 INVALID_TIMED_TEXT_SIZE_IN_BYTES,
212 /** The total size of all a timed text asset's fonts is larger than 10MB [Bv2.1_7.2.1]
213 * note contains the invalid size in bytes
214 * file contains the asset filename
216 INVALID_TIMED_TEXT_FONT_SIZE_IN_BYTES,
217 /** Some SMPTE subtitle XML has no _<Language>_ tag [Bv2.1_7.2.2]
218 * file contains the asset filename
220 MISSING_SUBTITLE_LANGUAGE,
221 /** Not all subtitle assets specify the same _<Language>_ tag [Bv2.1_7.2.2] */
222 MISMATCHED_SUBTITLE_LANGUAGES,
223 /** Some SMPTE subtitle XML has no _<StartTime>_ tag [Bv2.1_7.2.3]
224 * file contains the asset filename
226 MISSING_SUBTITLE_START_TIME,
227 /** Some SMPTE subtitle XML has a non-zero _<StartTime>_ tag [Bv2.1_7.2.3]
228 * file contains the asset filename
230 INVALID_SUBTITLE_START_TIME,
231 /** The first subtitle or closed caption happens before 4s into the first reel [Bv2.1_7.2.4] */
232 INVALID_SUBTITLE_FIRST_TEXT_TIME,
233 /** At least one subtitle is less than the minimum of 15 frames suggested by [Bv2.1_7.2.5] */
234 INVALID_SUBTITLE_DURATION,
235 /** At least one pair of subtitles are separated by less than the the minimum of 2 frames suggested by [Bv2.1_7.2.5] */
236 INVALID_SUBTITLE_SPACING,
237 /** A subtitle lasts for longer than the reel which contains it */
238 SUBTITLE_OVERLAPS_REEL_BOUNDARY,
239 /** There are more than 3 subtitle lines in at least one place [Bv2.1_7.2.7] */
240 INVALID_SUBTITLE_LINE_COUNT,
241 /** There are more than 52 characters in at least one subtitle line [Bv2.1_7.2.7] */
242 NEARLY_INVALID_SUBTITLE_LINE_LENGTH,
243 /** There are more than 79 characters in at least one subtitle line [Bv2.1_7.2.7] */
244 INVALID_SUBTITLE_LINE_LENGTH,
245 /** There are more than 3 closed caption lines in at least one place [Bv2.1_7.2.6] */
246 INVALID_CLOSED_CAPTION_LINE_COUNT,
247 /** There are more than 32 characters in at least one closed caption line [Bv2.1_7.2.6] */
248 INVALID_CLOSED_CAPTION_LINE_LENGTH,
249 /** The audio sampling rate must be 48kHz [Bv2.1_7.3]
250 * note contains the invalid frame rate
251 * file contains the asset filename
253 INVALID_SOUND_FRAME_RATE,
254 /** The CPL has no _<AnnotationText>_ tag [Bv2.1_8.1]
255 * note contains the CPL ID
256 * file contains the CPL filename
258 MISSING_CPL_ANNOTATION_TEXT,
259 /** The _<AnnotationText>_ is not the same as the _<ContentTitleText>_ [Bv2.1_8.1]
260 * note contains the CPL ID
261 * file contains the CPL filename
263 MISMATCHED_CPL_ANNOTATION_TEXT,
264 /** At least one asset in a reel does not have the same duration as the others */
265 MISMATCHED_ASSET_DURATION,
266 /** If one reel has a _MainSubtitle_, all must have them */
267 MISSING_MAIN_SUBTITLE_FROM_SOME_REELS,
268 /** If one reel has at least one _ClosedCaption_, all reels must have the same number of _ClosedCaptions_ */
269 MISMATCHED_CLOSED_CAPTION_ASSET_COUNTS,
270 /** MainSubtitle in reels must have _<EntryPoint>_ [Bv2.1_8.3.2]
271 * note contains the asset ID
273 MISSING_SUBTITLE_ENTRY_POINT,
274 /** MainSubtitle _<EntryPoint>_ must be zero [Bv2.1_8.3.2]
275 * note contains the asset ID
277 INCORRECT_SUBTITLE_ENTRY_POINT,
278 /** Closed caption in reels must have _<EntryPoint>_ [Bv2.1_8.3.2]
279 * note contains the asset ID
281 MISSING_CLOSED_CAPTION_ENTRY_POINT,
282 /** Closed caption _MainSubtitle_ _<EntryPoint>_ must be zero [Bv2.1_8.3.2]
283 * note contains the asset ID
285 INCORRECT_CLOSED_CAPTION_ENTRY_POINT,
286 /** _<Hash>_ must be present for assets in CPLs
287 * note contains the asset ID
290 /** If _ContentKind_ is Feature there must be a FFEC marker */
291 MISSING_FFEC_IN_FEATURE,
292 /** If _ContentKind_ is Feature there must be a FFMC marker */
293 MISSING_FFMC_IN_FEATURE,
294 /** There should be a FFOC marker */
296 /** There should be a LFOC marker */
298 /** The FFOC marker should be 1
299 * note contains the incorrect value.
302 /** The LFOC marker should be the last frame in the reel
303 * note contains the incorrect value
306 /** There must be a _<CompositionMetadataAsset>_
307 * note contains the CPL ID
308 * file contains the CPL filename
310 MISSING_CPL_METADATA,
311 /** CPL metadata should contain _<VersionNumber>_ of 1, at least
312 * note contains the CPL ID
313 * file contains the CPL filename
315 MISSING_CPL_METADATA_VERSION_NUMBER,
316 /** There must be an _<ExtensionMetadata>_ in _<CompositionMetadataAsset>_ [Bv2.1_8.6.3]
317 * note contains the CPL ID
318 * file contains the CPL filename
320 MISSING_EXTENSION_METADATA,
321 /** _<ExtensionMetadata>_ does not have the correct form [Bv2.1_8.6.3]
322 * note contains details of what's wrong
323 * file contains the CPL filename
325 INVALID_EXTENSION_METADATA,
326 /** A CPL containing encrypted content is not signed [Bv2.1_8.7]
327 * note contains the CPL ID
328 * file contains the CPL filename
330 UNSIGNED_CPL_WITH_ENCRYPTED_CONTENT,
331 /** A PKL containing encrypted content is not signed [Bv2.1_8.7]
332 * note contains the PKL ID
333 * file contains the PKL filename
335 UNSIGNED_PKL_WITH_ENCRYPTED_CONTENT,
336 /** If a PKL has one CPL its _<ContentTitleText>_ must be the same as the PKL's _<AnnotationText>_
337 * note contains the PKL ID
338 * file contains the PKL filename
340 MISMATCHED_PKL_ANNOTATION_TEXT_WITH_CPL,
341 /** All content is encrypted */
343 /** No content is encrypted */
345 /** Some, but not all content, is encrypted */
347 /** General error during JPEG2000 codestream verification
348 * frame contains the frame index (counted from 0)
349 * note contains details
351 INVALID_JPEG2000_CODESTREAM,
352 /** Invalid number of guard bits in a 2K JPEG2000 stream (should be 1) [Bv2.1_10.2.1]
353 * note contains the number of guard bits
355 INVALID_JPEG2000_GUARD_BITS_FOR_2K,
356 /** Invalid number of guard bits in a 4K JPEG2000 stream (should be 2) [Bv2.1_10.2.1]
357 * note contains the number of guard bits
359 INVALID_JPEG2000_GUARD_BITS_FOR_4K,
360 /** JPEG2000 tile size is not the same as the image size [Bv2.1_10.2.1] */
361 INVALID_JPEG2000_TILE_SIZE,
362 /** JPEG2000 code block width is not 32 [Bv2.1_10.2.1]
363 * note contains the code block width
365 INVALID_JPEG2000_CODE_BLOCK_WIDTH,
366 /** JPEG2000 code block height is not 32 [Bv2.1_10.2.1]
367 * note contains the code block height
369 INVALID_JPEG2000_CODE_BLOCK_HEIGHT,
370 /** There must be no POC markers in a 2K codestream [Bv2.1_10.2.1]
371 * note contains the number of POC markers found
373 INCORRECT_JPEG2000_POC_MARKER_COUNT_FOR_2K,
374 /** There must be exactly one POC marker in a 4K codestream [Bv2.1_10.2.1]
375 * note contains the number of POC markers found
377 INCORRECT_JPEG2000_POC_MARKER_COUNT_FOR_4K,
378 /** A POC marker has incorrect content [Bv2.1_10.2.1]
379 * note contains details
381 INCORRECT_JPEG2000_POC_MARKER,
382 /** A POC marker was found outside the main head [Bv2.1_10.2.1] */
383 INVALID_JPEG2000_POC_MARKER_LOCATION,
384 /** Invalid number of tile parts for 2K JPEG2000 stream (should be 3) [Bv2.1_10.2.1]
385 * note contains the number of tile parts
387 INVALID_JPEG2000_TILE_PARTS_FOR_2K,
388 /** Invalid number of tile parts for 4K JPEG2000 stream (should be 6) [Bv2.1_10.2.1]
389 * note contains the number of tile parts
391 INVALID_JPEG2000_TILE_PARTS_FOR_4K,
392 /** No TLM marker was found [Bv2.1_10.2.1] */
393 MISSING_JPEG200_TLM_MARKER,
394 /** The MXF _ResourceID_ of a timed text resource was not the same as that of the contained XML essence [Bv2.1_10.4.3] */
395 MISMATCHED_TIMED_TEXT_RESOURCE_ID,
396 /** The AssetID of a timed text MXF is the same as its _ResourceID_ or that of the contained XML essence [Bv2.1_10.4.2] */
397 INCORRECT_TIMED_TEXT_ASSET_ID,
398 /** The ContainerDuration of a timed text MXF is not the same as the _Duration_ in its reel [Bv2.1_10.4.3]
399 * note contains the reel duration, followed by a space, followed by the MXF duration
400 * file contains the asset filename
402 MISMATCHED_TIMED_TEXT_DURATION,
403 /** Something could not be verified because content is encrypted and no key is available */
404 MISSED_CHECK_OF_ENCRYPTED,
405 /** Some timed-text XML has an empty <_Text_> node */
407 /** Some closed captions do not have the same vertical alignment within a <_Subtitle_> node */
408 MISMATCHED_CLOSED_CAPTION_VALIGN,
409 /** Some closed captions are not listed in the XML in the order of their vertical position */
410 INCORRECT_CLOSED_CAPTION_ORDERING,
411 /** Some <MainMarkers> asset has an <EntryPoint> that should not be there */
412 UNEXPECTED_ENTRY_POINT,
413 /** Some <MainMarkers> asset has an <Duration> that should not be there */
415 /** A <ContentKind> has been specified with either no scope or the SMPTE 429-7 scope, but which is not one of those allowed */
416 INVALID_CONTENT_KIND,
417 /** Either the width or height of a <MainPictureActiveArea> in a CPL is either not an even number, or bigger than the corresponding asset dimension.
418 * note contains details of what is wrong
419 * file contains the CPL filename
421 INVALID_MAIN_PICTURE_ACTIVE_AREA,
422 /** A PKL has more than one asset with the same ID
423 * note contains the PKL ID
424 * file contains the PKL filename
426 DUPLICATE_ASSET_ID_IN_PKL,
427 /** An ASSETMAP has more than one asset with the same ID
428 * note contains the ASSETMAP ID
429 * file contains the ASSETMAP filename
431 DUPLICATE_ASSET_ID_IN_ASSETMAP,
432 /** An Interop subtitle asset has no subtitles
433 * note contains the asset ID
434 * file contains the asset filename
437 /** A SMPTE subtitle asset as an <IssueDate> which is not of the form yyyy-mm-ddThh:mm:ss
438 * I can find no reference in a standard to this being required, but the Deluxe delivery
439 * specifications require it and their QC will fail DCPs that don't have it.
440 * note contains the incorrect <IssueDate>
442 INVALID_SUBTITLE_ISSUE_DATE,
443 /** The sound assets in the CPL do not have the same audio channel count.
444 * file contains the filename of the first asset to differ
446 MISMATCHED_SOUND_CHANNEL_COUNTS,
447 /** The CPL contains a MainSoundConfiguration tag which does not describe the number of
448 * channels in the audio assets.
449 * note contains details of what is wrong
450 * file contains the CPL filename
452 INVALID_MAIN_SOUND_CONFIGURATION,
453 /** An interop subtitle file has a <LoadFont> node which refers to a font file that is not found.
454 * note contains the <LoadFont> ID
457 /** A tile part in a JPEG2000 frame is too big.
458 * frame contains the frame index (counted from 0)
459 * component contains the component index (0, 1 or 2)
460 * size contains the invalid size in bytes.
462 INVALID_JPEG2000_TILE_PART_SIZE,
463 /** A subtitle XML root node has more than one namespace (xmlns) declaration.
464 * note contains the asset ID
466 INCORRECT_SUBTITLE_NAMESPACE_COUNT,
467 /** A subtitle or closed caption file has a <Font> tag which refers to a font that is not
468 * first introduced with a <LoadFont>.
469 * id contains the ID of the <Font> tag.
471 MISSING_LOAD_FONT_FOR_FONT,
472 /** A SMPTE subtitle asset has at least one <Text> element but no <LoadFont>
473 * id contains the ID of the subtitle asset.
476 /** An ID in an asset map does not match the ID obtained from reading the actual file.
477 * id contains the ID from the asset map.
478 * other_id contains the ID from the file.
480 MISMATCHED_ASSET_MAP_ID,
481 /** The <LabelText> inside a <ContentVersion> is empty
482 * note contains the CPL ID
483 * file contains the CPL filename
485 EMPTY_CONTENT_VERSION_LABEL_TEXT,
488 VerificationNote (Type type, Code code)
493 VerificationNote (Type type, Code code, std::string note)
497 _data[Data::NOTE] = note;
500 VerificationNote (Type type, Code code, boost::filesystem::path file)
504 _data[Data::FILE] = file;
507 VerificationNote (Type type, Code code, std::string note, boost::filesystem::path file)
511 _data[Data::NOTE] = note;
512 _data[Data::FILE] = file;
515 VerificationNote (Type type, Code code, std::string note, boost::filesystem::path file, uint64_t line)
519 _data[Data::NOTE] = note;
520 _data[Data::FILE] = file;
521 _data[Data::LINE] = line;
534 NOTE, ///< further information about the error
535 FILE, ///< path of file containing the error
536 LINE, ///< error line number within the FILE
549 boost::optional<T> data(Data key) const
551 auto iter = _data.find(key);
552 if (iter == _data.end()) {
555 return boost::any_cast<T>(iter->second);
559 boost::optional<std::string> note () const {
560 return data<std::string>(Data::NOTE);
563 boost::optional<boost::filesystem::path> file () const {
564 return data<boost::filesystem::path>(Data::FILE);
567 boost::optional<uint64_t> line () const {
568 return data<uint64_t>(Data::LINE);
571 VerificationNote& set_frame(int frame) {
572 _data[Data::FRAME] = frame;
576 boost::optional<int> frame() const {
577 return data<int>(Data::FRAME);
580 VerificationNote& set_component(int component) {
581 _data[Data::COMPONENT] = component;
585 boost::optional<int> component() const {
586 return data<int>(Data::COMPONENT);
589 VerificationNote& set_size(int size) {
590 _data[Data::SIZE] = size;
594 boost::optional<int> size() const {
595 return data<int>(Data::SIZE);
598 VerificationNote& set_id(std::string id) {
599 _data[Data::ID] = id;
603 boost::optional<std::string> id() const {
604 return data<std::string>(Data::ID);
607 VerificationNote& set_other_id(std::string other_id) {
608 _data[Data::OTHER_ID] = other_id;
612 boost::optional<std::string> other_id() const {
613 return data<std::string>(Data::OTHER_ID);
616 VerificationNote& set_frame_rate(int frame_rate) {
617 _data[Data::FRAME_RATE] = frame_rate;
621 boost::optional<int> frame_rate() const {
622 return data<int>(Data::FRAME_RATE);
625 VerificationNote& set_calculated_hash(std::string hash) {
626 _data[Data::CALCULATED_HASH] = hash;
630 boost::optional<std::string> calculated_hash() const {
631 return data<std::string>(Data::CALCULATED_HASH);
634 VerificationNote& set_reference_hash(std::string hash) {
635 _data[Data::REFERENCE_HASH] = hash;
639 boost::optional<std::string> reference_hash() const {
640 return data<std::string>(Data::REFERENCE_HASH);
643 VerificationNote& set_cpl_id(std::string id) {
644 _data[Data::CPL_ID] = id;
648 boost::optional<std::string> cpl_id() const {
649 return data<std::string>(Data::CPL_ID);
655 std::map<Data, boost::any> _data;
659 struct VerificationOptions
661 ///< If set, any assets larger than this number of bytes will not have their hashes checked
662 boost::optional<boost::uintmax_t> maximum_asset_size_for_hash_check;
663 ///< true to check asset hashes (except those which match maximum_asset_size_for_hash_check)
664 ///< false to check no asset hashes.
665 bool check_asset_hashes = true;
671 std::vector<VerificationNote> notes;
672 std::vector<std::shared_ptr<dcp::DCP>> dcps;
677 std::vector<boost::filesystem::path> directories,
678 std::vector<dcp::DecryptedKDM> kdms,
679 std::function<void (std::string, boost::optional<boost::filesystem::path>)> stage,
680 std::function<void (float)> progress,
681 VerificationOptions options = {},
682 boost::optional<boost::filesystem::path> xsd_dtd_directory = boost::optional<boost::filesystem::path>()
685 std::string note_to_string (dcp::VerificationNote note);
687 bool operator== (dcp::VerificationNote const& a, dcp::VerificationNote const& b);
688 bool operator!=(dcp::VerificationNote const& a, dcp::VerificationNote const& b);
689 bool operator< (dcp::VerificationNote const& a, dcp::VerificationNote const& b);
691 std::ostream& operator<<(std::ostream& s, dcp::VerificationNote const& note);