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| 1 // Copyright 2015 The Chromium Authors. All rights reserved. | 1 // Copyright 2015 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #include "core/html/track/AutomaticTrackSelection.h" | 5 #include "core/html/track/AutomaticTrackSelection.h" |
| 6 | 6 |
| 7 #include "core/html/track/TextTrack.h" | 7 #include "core/html/track/TextTrack.h" |
| 8 #include "core/html/track/TextTrackList.h" | 8 #include "core/html/track/TextTrackList.h" |
| 9 #include "platform/Language.h" | 9 #include "platform/Language.h" |
| 10 | 10 |
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| 80 | 80 |
| 81 if (m_configuration.disableCurrentlyEnabledTracks && | 81 if (m_configuration.disableCurrentlyEnabledTracks && |
| 82 textTrack->mode() == TextTrack::showingKeyword()) | 82 textTrack->mode() == TextTrack::showingKeyword()) |
| 83 currentlyEnabledTracks.append(textTrack); | 83 currentlyEnabledTracks.append(textTrack); |
| 84 | 84 |
| 85 int trackScore = textTrackSelectionScore(*textTrack); | 85 int trackScore = textTrackSelectionScore(*textTrack); |
| 86 | 86 |
| 87 if (textTrack->kind() == preferredTrackKind()) | 87 if (textTrack->kind() == preferredTrackKind()) |
| 88 trackScore += 1; | 88 trackScore += 1; |
| 89 if (trackScore) { | 89 if (trackScore) { |
| 90 // * If the text track kind is subtitles or captions and the user has indi
cated an interest in having a | 90 // * If the text track kind is subtitles or captions and the user has |
| 91 // track with this text track kind, text track language, and text track la
bel enabled, and there is no | 91 // indicated an interest in having a track with this text track kind, text |
| 92 // other text track in the media element's list of text tracks with a text
track kind of either subtitles | 92 // track language, and text track label enabled, and there is no other |
| 93 // or captions whose text track mode is showing | 93 // text track in the media element's list of text tracks with a text track |
| 94 // kind of either subtitles or captions whose text track mode is showing |
| 94 // Let the text track mode be showing. | 95 // Let the text track mode be showing. |
| 95 if (trackScore > highestTrackScore) { | 96 if (trackScore > highestTrackScore) { |
| 96 preferredTrack = textTrack; | 97 preferredTrack = textTrack; |
| 97 highestTrackScore = trackScore; | 98 highestTrackScore = trackScore; |
| 98 } | 99 } |
| 99 if (!defaultTrack && textTrack->isDefault()) | 100 if (!defaultTrack && textTrack->isDefault()) |
| 100 defaultTrack = textTrack; | 101 defaultTrack = textTrack; |
| 101 | 102 |
| 102 if (!fallbackTrack) | 103 if (!fallbackTrack) |
| 103 fallbackTrack = textTrack; | 104 fallbackTrack = textTrack; |
| 104 } else if (!group.visibleTrack && !defaultTrack && textTrack->isDefault()) { | 105 } else if (!group.visibleTrack && !defaultTrack && textTrack->isDefault()) { |
| 105 // * If the track element has a default attribute specified, and there is
no other text track in the media | 106 // * If the track element has a default attribute specified, and there is |
| 106 // element's list of text tracks whose text track mode is showing or showi
ng by default | 107 // no other text track in the media element's list of text tracks whose |
| 108 // text track mode is showing or showing by default |
| 107 // Let the text track mode be showing by default. | 109 // Let the text track mode be showing by default. |
| 108 defaultTrack = textTrack; | 110 defaultTrack = textTrack; |
| 109 } | 111 } |
| 110 } | 112 } |
| 111 | 113 |
| 112 if (m_configuration.textTrackKindUserPreference != | 114 if (m_configuration.textTrackKindUserPreference != |
| 113 TextTrackKindUserPreference::Default) | 115 TextTrackKindUserPreference::Default) |
| 114 trackToEnable = preferredTrack; | 116 trackToEnable = preferredTrack; |
| 115 | 117 |
| 116 if (!trackToEnable && defaultTrack) | 118 if (!trackToEnable && defaultTrack) |
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| 179 DCHECK_EQ(kind, TextTrack::metadataKeyword()); | 181 DCHECK_EQ(kind, TextTrack::metadataKeyword()); |
| 180 currentGroup = &metadataTracks; | 182 currentGroup = &metadataTracks; |
| 181 } | 183 } |
| 182 | 184 |
| 183 if (!currentGroup->visibleTrack && | 185 if (!currentGroup->visibleTrack && |
| 184 textTrack->mode() == TextTrack::showingKeyword()) | 186 textTrack->mode() == TextTrack::showingKeyword()) |
| 185 currentGroup->visibleTrack = textTrack; | 187 currentGroup->visibleTrack = textTrack; |
| 186 if (!currentGroup->defaultTrack && textTrack->isDefault()) | 188 if (!currentGroup->defaultTrack && textTrack->isDefault()) |
| 187 currentGroup->defaultTrack = textTrack; | 189 currentGroup->defaultTrack = textTrack; |
| 188 | 190 |
| 189 // Do not add this track to the group if it has already been automatically c
onfigured | 191 // Do not add this track to the group if it has already been automatically |
| 190 // as we only want to perform selection once per track so that adding anothe
r track | 192 // configured as we only want to perform selection once per track so that |
| 191 // after the initial configuration doesn't reconfigure every track - only th
ose that | 193 // adding another track after the initial configuration doesn't reconfigure |
| 192 // should be changed by the new addition. For example all metadata tracks ar
e | 194 // every track - only those that should be changed by the new addition. For |
| 193 // disabled by default, and we don't want a track that has been enabled by s
cript | 195 // example all metadata tracks are disabled by default, and we don't want a |
| 194 // to be disabled automatically when a new metadata track is added later. | 196 // track that has been enabled by script to be disabled automatically when a |
| 197 // new metadata track is added later. |
| 195 if (textTrack->hasBeenConfigured()) | 198 if (textTrack->hasBeenConfigured()) |
| 196 continue; | 199 continue; |
| 197 | 200 |
| 198 if (textTrack->language().length()) | 201 if (textTrack->language().length()) |
| 199 currentGroup->hasSrcLang = true; | 202 currentGroup->hasSrcLang = true; |
| 200 currentGroup->tracks.append(textTrack); | 203 currentGroup->tracks.append(textTrack); |
| 201 } | 204 } |
| 202 | 205 |
| 203 if (captionAndSubtitleTracks.tracks.size()) | 206 if (captionAndSubtitleTracks.tracks.size()) |
| 204 performAutomaticTextTrackSelection(captionAndSubtitleTracks); | 207 performAutomaticTextTrackSelection(captionAndSubtitleTracks); |
| 205 if (descriptionTracks.tracks.size()) | 208 if (descriptionTracks.tracks.size()) |
| 206 performAutomaticTextTrackSelection(descriptionTracks); | 209 performAutomaticTextTrackSelection(descriptionTracks); |
| 207 if (chapterTracks.tracks.size()) | 210 if (chapterTracks.tracks.size()) |
| 208 performAutomaticTextTrackSelection(chapterTracks); | 211 performAutomaticTextTrackSelection(chapterTracks); |
| 209 if (metadataTracks.tracks.size()) | 212 if (metadataTracks.tracks.size()) |
| 210 enableDefaultMetadataTextTracks(metadataTracks); | 213 enableDefaultMetadataTextTracks(metadataTracks); |
| 211 } | 214 } |
| 212 | 215 |
| 213 } // namespace blink | 216 } // namespace blink |
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