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      1 // Copyright 2013 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #include "media/blink/texttrack_impl.h"
      6 
      7 #include "base/bind.h"
      8 #include "base/location.h"
      9 #include "base/single_thread_task_runner.h"
     10 #include "media/base/bind_to_current_loop.h"
     11 #include "media/blink/webinbandtexttrack_impl.h"
     12 #include "third_party/WebKit/public/platform/WebInbandTextTrackClient.h"
     13 #include "third_party/WebKit/public/platform/WebMediaPlayerClient.h"
     14 
     15 namespace media {
     16 
     17 TextTrackImpl::TextTrackImpl(
     18     const scoped_refptr<base::SingleThreadTaskRunner>& task_runner,
     19     blink::WebMediaPlayerClient* client,
     20     scoped_ptr<WebInbandTextTrackImpl> text_track)
     21     : task_runner_(task_runner),
     22       client_(client),
     23       text_track_(text_track.Pass()) {
     24   client_->addTextTrack(text_track_.get());
     25 }
     26 
     27 TextTrackImpl::~TextTrackImpl() {
     28   task_runner_->PostTask(
     29       FROM_HERE,
     30       base::Bind(&TextTrackImpl::OnRemoveTrack,
     31                  client_,
     32                  base::Passed(&text_track_)));
     33 }
     34 
     35 void TextTrackImpl::addWebVTTCue(const base::TimeDelta& start,
     36                                  const base::TimeDelta& end,
     37                                  const std::string& id,
     38                                  const std::string& content,
     39                                  const std::string& settings) {
     40   task_runner_->PostTask(
     41     FROM_HERE,
     42     base::Bind(&TextTrackImpl::OnAddCue,
     43                 text_track_.get(),
     44                 start, end,
     45                 id, content, settings));
     46 }
     47 
     48 void TextTrackImpl::OnAddCue(WebInbandTextTrackImpl* text_track,
     49                              const base::TimeDelta& start,
     50                              const base::TimeDelta& end,
     51                              const std::string& id,
     52                              const std::string& content,
     53                              const std::string& settings) {
     54   if (blink::WebInbandTextTrackClient* client = text_track->client()) {
     55     client->addWebVTTCue(start.InSecondsF(),
     56                          end.InSecondsF(),
     57                          blink::WebString::fromUTF8(id),
     58                          blink::WebString::fromUTF8(content),
     59                          blink::WebString::fromUTF8(settings));
     60   }
     61 }
     62 
     63 void TextTrackImpl::OnRemoveTrack(
     64     blink::WebMediaPlayerClient* client,
     65     scoped_ptr<WebInbandTextTrackImpl> text_track) {
     66   if (text_track->client())
     67     client->removeTextTrack(text_track.get());
     68 }
     69 
     70 }  // namespace media
     71