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108f4f14f3
When an ExtractorMediaSource is used in a concatenation, and probably when using repeat modes, it needs to produce multiple ExtractorMediaPeriods during usage. Currently we fire a source info refresh every time a new ExtractorMediaPeriod instance prepares, which triggers ExoPlayer.EventListener's onTimelineChanged method. In nearly all cases the timeline is unchanged after the first ExtractorMediaPeriod is prepared. This change suppresses these no-op changes. ------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=162484234