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ee4d297f22
When reading the last period, the readingPeriodHolder was set to null in updatePeriods if it was the last period. (This would occur almost immediately when playing a single-period source.) seekToPeriodPosition suppresses reusing a loaded/prepared period if the reading period and playing period did not match, which meant that the whole timeline was recreated when seeking in the last period. Leave readingPeriodHolder non-null. This means that at all times either playingPeriodHolder == readingPeriodHolder (and they could be null or non-null), or playingPeriodHolder and readingPeriodHolder differ and are both non-null. Also fix an issue where streams were never forced to be recreated during track reselection when reading ahead. ------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=134774238