| // Copyright 2014 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/buffered_data_source_host_impl.h" |
| |
| namespace media { |
| |
| BufferedDataSourceHostImpl::BufferedDataSourceHostImpl() |
| : total_bytes_(0), |
| did_loading_progress_(false) { } |
| |
| BufferedDataSourceHostImpl::~BufferedDataSourceHostImpl() { } |
| |
| void BufferedDataSourceHostImpl::SetTotalBytes(int64 total_bytes) { |
| total_bytes_ = total_bytes; |
| } |
| |
| void BufferedDataSourceHostImpl::AddBufferedByteRange(int64 start, int64 end) { |
| buffered_byte_ranges_.Add(start, end); |
| did_loading_progress_ = true; |
| } |
| |
| static base::TimeDelta TimeForByteOffset( |
| int64 byte_offset, int64 total_bytes, base::TimeDelta duration) { |
| double position = static_cast<double>(byte_offset) / total_bytes; |
| // Snap to the beginning/end where the approximation can look especially bad. |
| if (position < 0.01) |
| return base::TimeDelta(); |
| if (position > 0.99) |
| return duration; |
| return base::TimeDelta::FromMilliseconds( |
| static_cast<int64>(position * duration.InMilliseconds())); |
| } |
| |
| void BufferedDataSourceHostImpl::AddBufferedTimeRanges( |
| Ranges<base::TimeDelta>* buffered_time_ranges, |
| base::TimeDelta media_duration) const { |
| DCHECK(media_duration != kNoTimestamp()); |
| DCHECK(media_duration != kInfiniteDuration()); |
| if (total_bytes_ && buffered_byte_ranges_.size()) { |
| for (size_t i = 0; i < buffered_byte_ranges_.size(); ++i) { |
| int64 start = buffered_byte_ranges_.start(i); |
| int64 end = buffered_byte_ranges_.end(i); |
| buffered_time_ranges->Add( |
| TimeForByteOffset(start, total_bytes_, media_duration), |
| TimeForByteOffset(end, total_bytes_, media_duration)); |
| } |
| } |
| } |
| |
| bool BufferedDataSourceHostImpl::DidLoadingProgress() { |
| bool ret = did_loading_progress_; |
| did_loading_progress_ = false; |
| return ret; |
| } |
| |
| } // namespace media |