1 // Copyright 2013 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/websourcebuffer_impl.h" 6 7 #include "base/float_util.h" 8 #include "media/filters/chunk_demuxer.h" 9 10 namespace content { 11 12 static base::TimeDelta DoubleToTimeDelta(double time) { 13 DCHECK(!base::IsNaN(time)); 14 DCHECK_GE(time, 0); 15 if (time == std::numeric_limits<double>::infinity()) 16 return media::kInfiniteDuration(); 17 18 base::TimeDelta max_time = base::TimeDelta::FromInternalValue(kint64max - 1); 19 double max_time_in_seconds = max_time.InSecondsF(); 20 21 if (time >= max_time_in_seconds) 22 return max_time; 23 24 return base::TimeDelta::FromMicroseconds( 25 time * base::Time::kMicrosecondsPerSecond); 26 } 27 28 WebSourceBufferImpl::WebSourceBufferImpl( 29 const std::string& id, media::ChunkDemuxer* demuxer) 30 : id_(id), 31 demuxer_(demuxer) { 32 DCHECK(demuxer_); 33 } 34 35 WebSourceBufferImpl::~WebSourceBufferImpl() { 36 DCHECK(!demuxer_) << "Object destroyed w/o removedFromMediaSource() call"; 37 } 38 39 blink::WebTimeRanges WebSourceBufferImpl::buffered() { 40 media::Ranges<base::TimeDelta> ranges = demuxer_->GetBufferedRanges(id_); 41 blink::WebTimeRanges result(ranges.size()); 42 for (size_t i = 0; i < ranges.size(); i++) { 43 result[i].start = ranges.start(i).InSecondsF(); 44 result[i].end = ranges.end(i).InSecondsF(); 45 } 46 return result; 47 } 48 49 void WebSourceBufferImpl::append(const unsigned char* data, unsigned length) { 50 demuxer_->AppendData(id_, data, length); 51 } 52 53 void WebSourceBufferImpl::abort() { 54 demuxer_->Abort(id_); 55 } 56 57 void WebSourceBufferImpl::remove(double start, double end) { 58 demuxer_->Remove(id_, DoubleToTimeDelta(start), DoubleToTimeDelta(end)); 59 } 60 61 bool WebSourceBufferImpl::setTimestampOffset(double offset) { 62 base::TimeDelta time_offset = base::TimeDelta::FromMicroseconds( 63 offset * base::Time::kMicrosecondsPerSecond); 64 return demuxer_->SetTimestampOffset(id_, time_offset); 65 } 66 67 void WebSourceBufferImpl::setAppendWindowStart(double start) { 68 demuxer_->SetAppendWindowStart(id_, DoubleToTimeDelta(start)); 69 } 70 71 void WebSourceBufferImpl::setAppendWindowEnd(double end) { 72 demuxer_->SetAppendWindowEnd(id_, DoubleToTimeDelta(end)); 73 } 74 75 void WebSourceBufferImpl::removedFromMediaSource() { 76 demuxer_->RemoveId(id_); 77 demuxer_ = NULL; 78 } 79 80 } // namespace content 81
