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// 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"
#include "media/base/timestamp_constants.h"
namespace media {
BufferedDataSourceHostImpl::BufferedDataSourceHostImpl()
: total_bytes_(0),
did_loading_progress_(false) { }
BufferedDataSourceHostImpl::~BufferedDataSourceHostImpl() { }
void BufferedDataSourceHostImpl::SetTotalBytes(int64_t total_bytes) {
total_bytes_ = total_bytes;
}
void BufferedDataSourceHostImpl::AddBufferedByteRange(int64_t start,
int64_t end) {
const auto i = buffered_byte_ranges_.find(start);
if (i.value() && i.interval_end() >= end) {
// No change
return;
}
buffered_byte_ranges_.SetInterval(start, end, 1);
did_loading_progress_ = true;
}
static base::TimeDelta TimeForByteOffset(int64_t byte_offset,
int64_t 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_t>(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_.empty()) {
for (const auto i : buffered_byte_ranges_) {
if (i.second) {
int64_t start = i.first.begin;
int64_t end = i.first.end;
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
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