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 59
