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LibVideo: Implement Matroska keyframe search for when there are no Cues
This just searches sequentially through each block in a SampleIterator until it finds a block after the specified seek timestamp. Once it finds one, it will try to set the input/output iterator to the most recent keyframe. If the iterator's original position is closer to the target, however, it leaves it at that original position, allowing callers to continue decoding from that position until they reach the target timestamp.
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3 changed files with 67 additions and 9 deletions
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@ -75,6 +75,7 @@ class SampleIterator {
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public:
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DecoderErrorOr<Block> next_block();
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Cluster const& current_cluster() { return *m_current_cluster; }
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Time const& last_timestamp() { return m_last_timestamp; }
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private:
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friend class Reader;
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@ -98,6 +99,7 @@ private:
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size_t m_position { 0 };
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u64 m_timestamp_scale { 0 };
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Time m_last_timestamp { Time::min() };
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Optional<Cluster> m_current_cluster;
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};
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