55 lines
1.5 KiB
C
55 lines
1.5 KiB
C
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// Copyright (c) 2013 Google Inc. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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//
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// Implements a wrapper around Decoding Time to Sample Box (STTS) to iterate
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// through the compressed table. This class also provides convenient functions
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// to query total number of samples and the duration from start_sample to
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// end_sample.
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#ifndef MEDIA_MP4_DECODING_TIME_ITERATOR_H_
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#define MEDIA_MP4_DECODING_TIME_ITERATOR_H_
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#include <vector>
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#include "media/mp4/box_definitions.h"
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namespace media {
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namespace mp4 {
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class DecodingTimeIterator {
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public:
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explicit DecodingTimeIterator(
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const DecodingTimeToSample& decoding_time_to_sample);
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// Advance the properties to refer to the next sample. Return status
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// indicating whether the sample is still valid.
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bool AdvanceSample();
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// Return whether the current sample is valid.
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bool IsValid();
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// Return sample delta for current sample.
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uint32 sample_delta() {
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return iterator_->sample_delta;
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}
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// Return duration from start_sample to end_sample, both 1-based, inclusive.
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uint64 Duration(uint32 start_sample, uint32 end_sample);
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// Return total number of samples in the table.
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uint32 NumSamples();
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private:
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uint32 sample_index_;
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const std::vector<DecodingTime>& decoding_time_table_;
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std::vector<DecodingTime>::const_iterator iterator_;
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DISALLOW_COPY_AND_ASSIGN(DecodingTimeIterator);
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};
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} // namespace mp4
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} // namespace media
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#endif // MEDIA_MP4_DECODING_TIME_ITERATOR_H_
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