Support earliest seekable time in WMPI.

media/blink/webmediaplayer_impl.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "media/blink/webmediaplayer_impl.h"
 
 #include <algorithm>
 #include <cmath>
 #include <limits>
 #include <string>
@@ skipping 470 matching lines @@
 
 bool WebMediaPlayerImpl::seeking() const {
   DCHECK(main_task_runner_->BelongsToCurrentThread());
 
   if (ready_state_ == WebMediaPlayer::ReadyStateHaveNothing)
     return false;
 
   return seeking_;
 }
 
+double WebMediaPlayerImpl::earliestTime() const {
+  return pipeline_.GetMediaStartTime().InSecondsF();
+}
+
 double WebMediaPlayerImpl::duration() const {
   DCHECK(main_task_runner_->BelongsToCurrentThread());
 
   if (ready_state_ == WebMediaPlayer::ReadyStateHaveNothing)
     return std::numeric_limits<double>::quiet_NaN();
 
   return GetPipelineDuration();
 }
 
 double WebMediaPlayerImpl::timelineOffset() const {
@@ skipping 48 matching lines @@
   }
   return ConvertToWebTimeRanges(buffered_time_ranges);
 }
 
 blink::WebTimeRanges WebMediaPlayerImpl::seekable() const {
   DCHECK(main_task_runner_->BelongsToCurrentThread());
 
   if (ready_state_ < WebMediaPlayer::ReadyStateHaveMetadata)
     return blink::WebTimeRanges();
 
+  const double seekable_start = pipeline_.GetMediaStartTime().InSecondsF();
   const double seekable_end = duration();
 
   // Allow a special exception for seeks to zero for streaming sources with a
   // finite duration; this allows looping to work.
   const bool allow_seek_to_zero = data_source_ && data_source_->IsStreaming() &&
                                   std::isfinite(seekable_end);
 
   // TODO(dalecurtis): Technically this allows seeking on media which return an
   // infinite duration so long as DataSource::IsStreaming() is false.  While not
   // expected, disabling this breaks semi-live players, http://crbug.com/427412.
   const blink::WebTimeRange seekable_range(
-      0.0, allow_seek_to_zero ? 0.0 : seekable_end);
+      allow_seek_to_zero ? 0.0 : seekable_start,
+      allow_seek_to_zero ? 0.0 : seekable_end);
   return blink::WebTimeRanges(&seekable_range, 1);
 }
 
 bool WebMediaPlayerImpl::didLoadingProgress() {
   DCHECK(main_task_runner_->BelongsToCurrentThread());
   bool pipeline_progress = pipeline_.DidLoadingProgress();
   bool data_progress = buffered_data_source_host_.DidLoadingProgress();
   return pipeline_progress || data_progress;
 }
 
@@ skipping 525 matching lines @@
            << ", Video: " << stats.video_memory_usage << ", DataSource: "
            << (data_source_ ? data_source_->GetMemoryUsage() : 0)
            << ", Demuxer: " << (demuxer_ ? demuxer_->GetMemoryUsage() : 0);
 
   const int64_t delta = current_memory_usage - last_reported_memory_usage_;
   last_reported_memory_usage_ = current_memory_usage;
   adjust_allocated_memory_cb_.Run(delta);
 }
 
 }  // namespace media