Upstream version 10.39.225.0
[platform/framework/web/crosswalk.git] / src / media / blink / buffered_data_source_host_impl.cc
1 // Copyright 2014 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/buffered_data_source_host_impl.h"
6
7 namespace media {
8
9 BufferedDataSourceHostImpl::BufferedDataSourceHostImpl()
10     : total_bytes_(0),
11       did_loading_progress_(false) { }
12
13 BufferedDataSourceHostImpl::~BufferedDataSourceHostImpl() { }
14
15 void BufferedDataSourceHostImpl::SetTotalBytes(int64 total_bytes) {
16   total_bytes_ = total_bytes;
17 }
18
19 void BufferedDataSourceHostImpl::AddBufferedByteRange(int64 start, int64 end) {
20   buffered_byte_ranges_.Add(start, end);
21   did_loading_progress_ = true;
22 }
23
24 static base::TimeDelta TimeForByteOffset(
25     int64 byte_offset, int64 total_bytes, base::TimeDelta duration) {
26   double position = static_cast<double>(byte_offset) / total_bytes;
27   // Snap to the beginning/end where the approximation can look especially bad.
28   if (position < 0.01)
29     return base::TimeDelta();
30   if (position > 0.99)
31     return duration;
32   return base::TimeDelta::FromMilliseconds(
33       static_cast<int64>(position * duration.InMilliseconds()));
34 }
35
36 void BufferedDataSourceHostImpl::AddBufferedTimeRanges(
37     Ranges<base::TimeDelta>* buffered_time_ranges,
38     base::TimeDelta media_duration) const {
39   DCHECK(media_duration != kNoTimestamp());
40   DCHECK(media_duration != kInfiniteDuration());
41   if (total_bytes_ && buffered_byte_ranges_.size()) {
42     for (size_t i = 0; i < buffered_byte_ranges_.size(); ++i) {
43       int64 start = buffered_byte_ranges_.start(i);
44       int64 end = buffered_byte_ranges_.end(i);
45       buffered_time_ranges->Add(
46           TimeForByteOffset(start, total_bytes_, media_duration),
47           TimeForByteOffset(end, total_bytes_, media_duration));
48     }
49   }
50 }
51
52 bool BufferedDataSourceHostImpl::DidLoadingProgress() {
53   bool ret = did_loading_progress_;
54   did_loading_progress_ = false;
55   return ret;
56 }
57
58 }  // namespace media