MP4 support for Common Encryption 'cbcs' scheme.

media/formats/mp4/track_run_iterator.h

 // Copyright 2014 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.
 
 #ifndef MEDIA_FORMATS_MP4_TRACK_RUN_ITERATOR_H_
 #define MEDIA_FORMATS_MP4_TRACK_RUN_ITERATOR_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <memory>
 #include <vector>
 
 #include "base/macros.h"
 #include "base/time/time.h"
 #include "media/base/media_export.h"
 #include "media/base/media_log.h"
 #include "media/base/stream_parser_buffer.h"
 #include "media/formats/mp4/box_definitions.h"
+#include "media/media_features.h"
 
 namespace media {
 
 class DecryptConfig;
 
 namespace mp4 {
 
 base::TimeDelta MEDIA_EXPORT TimeDeltaFromRational(int64_t numer,
                                                    int64_t denom);
 DecodeTimestamp MEDIA_EXPORT DecodeTimestampFromRational(int64_t numer,
@@ skipping 62 matching lines @@
  private:
   void ResetRun();
   const TrackEncryption& track_encryption() const;
 
   uint32_t GetGroupDescriptionIndex(uint32_t sample_index) const;
 
   // Sample encryption information.
   bool IsSampleEncrypted(size_t sample_index) const;
   uint8_t GetIvSize(size_t sample_index) const;
   const std::vector<uint8_t>& GetKeyId(size_t sample_index) const;
+#if BUILDFLAG(ENABLE_CBCS_ENCRYPTION_SCHEME)
+  bool ApplyConstantIv(size_t sample_index, SampleEncryptionEntry& entry) const;
+#endif
 
   const Movie* moov_;
   scoped_refptr<MediaLog> media_log_;
 
   std::vector<TrackRunInfo> runs_;
   std::vector<TrackRunInfo>::const_iterator run_itr_;
   std::vector<SampleInfo>::const_iterator sample_itr_;
 
   int64_t sample_dts_;
   int64_t sample_offset_;
 
   DISALLOW_COPY_AND_ASSIGN(TrackRunIterator);
 };
 
 }  // namespace mp4
 }  // namespace media
 
 #endif  // MEDIA_FORMATS_MP4_TRACK_RUN_ITERATOR_H_