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Store and use fragmentedText settings in localStorage

Vinay Rosenberg requested to merge github/fork/Orange-OpenSource/textSettingsInLocalStorage into development

Created by: jeffcunat

fragmentedText initial settings were already stored in localStorage but never used. This PR allows to reuse previous subtitles settings stored in localStorage.

They are only used when loading a stream if

  • settings streaming.lastMediaSettingsCachingInfo.enabled is true
  • textDefaultEnabled is not explicitly false (can be undefined if setTextDefaultEnabled is not called)
  • setInitialMediaSettingsFor('fragmentedText') has not been called to set preferred language and/or role

This means that, if no other settings are set, dash.js player will reuse previously used subtitles language/role when loading a new stream (like what is already done for audio content)

samples/captioning/multi-track-captions.html has been modified in order to test various settings combination (no more auto-load to be able to set settings before loading)

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