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 "content/renderer/media/buffered_data_source_host_impl.h"
6
7 namespace content {
8
BufferedDataSourceHostImpl()9 BufferedDataSourceHostImpl::BufferedDataSourceHostImpl()
10 : total_bytes_(0),
11 did_loading_progress_(false) { }
12
~BufferedDataSourceHostImpl()13 BufferedDataSourceHostImpl::~BufferedDataSourceHostImpl() { }
14
SetTotalBytes(int64 total_bytes)15 void BufferedDataSourceHostImpl::SetTotalBytes(int64 total_bytes) {
16 total_bytes_ = total_bytes;
17 }
18
AddBufferedByteRange(int64 start,int64 end)19 void BufferedDataSourceHostImpl::AddBufferedByteRange(int64 start, int64 end) {
20 buffered_byte_ranges_.Add(start, end);
21 did_loading_progress_ = true;
22 }
23
TimeForByteOffset(int64 byte_offset,int64 total_bytes,base::TimeDelta duration)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
AddBufferedTimeRanges(media::Ranges<base::TimeDelta> * buffered_time_ranges,base::TimeDelta media_duration) const36 void BufferedDataSourceHostImpl::AddBufferedTimeRanges(
37 media::Ranges<base::TimeDelta>* buffered_time_ranges,
38 base::TimeDelta media_duration) const {
39 if (total_bytes_ && buffered_byte_ranges_.size()) {
40 for (size_t i = 0; i < buffered_byte_ranges_.size(); ++i) {
41 int64 start = buffered_byte_ranges_.start(i);
42 int64 end = buffered_byte_ranges_.end(i);
43 buffered_time_ranges->Add(
44 TimeForByteOffset(start, total_bytes_, media_duration),
45 TimeForByteOffset(end, total_bytes_, media_duration));
46 }
47 }
48 }
49
DidLoadingProgress()50 bool BufferedDataSourceHostImpl::DidLoadingProgress() {
51 bool ret = did_loading_progress_;
52 did_loading_progress_ = false;
53 return ret;
54 }
55
56 } // namespace content
57