PlatformTimeRanges.h [plain text]
#ifndef PlatformTimeRanges_h
#define PlatformTimeRanges_h
#include <algorithm>
#include <wtf/MediaTime.h>
#include <wtf/Vector.h>
namespace WTF {
class PrintStream;
}
namespace WebCore {
class WEBCORE_EXPORT PlatformTimeRanges {
WTF_MAKE_FAST_ALLOCATED;
public:
explicit PlatformTimeRanges() { }
PlatformTimeRanges(const MediaTime& start, const MediaTime& end);
MediaTime start(unsigned index) const;
MediaTime start(unsigned index, bool& valid) const;
MediaTime end(unsigned index) const;
MediaTime end(unsigned index, bool& valid) const;
MediaTime duration(unsigned index) const;
MediaTime maximumBufferedTime() const;
void invert();
void intersectWith(const PlatformTimeRanges&);
void unionWith(const PlatformTimeRanges&);
unsigned length() const { return m_ranges.size(); }
void add(const MediaTime& start, const MediaTime& end);
void clear();
bool contain(const MediaTime&) const;
size_t find(const MediaTime&) const;
MediaTime nearest(const MediaTime&) const;
MediaTime totalDuration() const;
void dump(WTF::PrintStream&) const;
template<class Encoder> void encode(Encoder&) const;
template<class Decoder> static Optional<PlatformTimeRanges> decode(Decoder&);
private:
struct Range {
Range() { }
Range(const MediaTime& start, const MediaTime& end)
: m_start(start)
, m_end(end)
{
}
MediaTime m_start;
MediaTime m_end;
template<class Encoder>
void encode(Encoder& encoder) const
{
encoder << m_start;
encoder << m_end;
}
template <class Decoder>
static Optional<Range> decode(Decoder& decoder)
{
Optional<MediaTime> start;
decoder >> start;
if (!start)
return WTF::nullopt;
Optional<MediaTime> end;
decoder >> end;
if (!end)
return WTF::nullopt;
return {{ WTFMove(*start), WTFMove(*end) }};
}
inline bool isPointInRange(const MediaTime& point) const
{
return m_start <= point && point < m_end;
}
inline bool isOverlappingRange(const Range& range) const
{
return isPointInRange(range.m_start) || isPointInRange(range.m_end) || range.isPointInRange(m_start);
}
inline bool isContiguousWithRange(const Range& range) const
{
return range.m_start == m_end || range.m_end == m_start;
}
inline Range unionWithOverlappingOrContiguousRange(const Range& range) const
{
Range ret;
ret.m_start = std::min(m_start, range.m_start);
ret.m_end = std::max(m_end, range.m_end);
return ret;
}
inline bool isBeforeRange(const Range& range) const
{
return range.m_start >= m_end;
}
};
PlatformTimeRanges(Vector<Range>&&);
Vector<Range> m_ranges;
};
template<class Encoder>
void PlatformTimeRanges::encode(Encoder& encoder) const
{
encoder << m_ranges;
}
template <class Decoder>
Optional<PlatformTimeRanges> PlatformTimeRanges::decode(Decoder& decoder)
{
Optional<Vector<Range>> buffered;
decoder >> buffered;
if (!buffered)
return WTF::nullopt;
return {{ WTFMove(*buffered) }};
}
}
#endif