67 lines
2.2 KiB
C++
67 lines
2.2 KiB
C++
// Copyright 2014 Google Inc. All rights reserved.
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//
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file or at
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// https://developers.google.com/open-source/licenses/bsd
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#ifndef MEDIA_FORMATS_MP4_KEY_ROTATION_FRAGMENTER_H_
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#define MEDIA_FORMATS_MP4_KEY_ROTATION_FRAGMENTER_H_
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#include "media/base/key_source.h"
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#include "media/formats/mp4/encrypting_fragmenter.h"
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namespace edash_packager {
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namespace media {
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namespace mp4 {
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struct MovieFragment;
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/// KeyRotationFragmenter generates MP4 fragments with sample encrypted by
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/// rotation keys.
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class KeyRotationFragmenter : public EncryptingFragmenter {
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public:
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/// @param moof points to a MovieFragment box.
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/// @param traf points to a TrackFragment box.
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/// @param encryption_key_source points to the source which generates
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/// encryption keys.
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/// @param track_type indicates whether SD key or HD key should be used to
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/// encrypt the video content.
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/// @param crypto_period_duration specifies crypto period duration in units
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/// of the current track's timescale.
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/// @param clear_time specifies clear lead duration in units of the current
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/// track's timescale.
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/// @param nalu_length_size NAL unit length size, in bytes, for subsample
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/// encryption.
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KeyRotationFragmenter(MovieFragment* moof,
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TrackFragment* traf,
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KeySource* encryption_key_source,
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KeySource::TrackType track_type,
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int64_t crypto_period_duration,
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int64_t clear_time,
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uint8_t nalu_length_size);
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virtual ~KeyRotationFragmenter();
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protected:
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/// @name Fragmenter implementation overrides.
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/// @{
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virtual Status PrepareFragmentForEncryption(bool enable_encryption) OVERRIDE;
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virtual void FinalizeFragmentForEncryption() OVERRIDE;
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/// @}
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private:
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MovieFragment* moof_;
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KeySource* encryption_key_source_;
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KeySource::TrackType track_type_;
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const int64_t crypto_period_duration_;
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size_t prev_crypto_period_index_;
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DISALLOW_COPY_AND_ASSIGN(KeyRotationFragmenter);
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};
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} // namespace mp4
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} // namespace media
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} // namespace edash_packager
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#endif // MEDIA_FORMATS_MP4_KEY_ROTATION_FRAGMENTER_H_
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