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// Copyright 2021 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.
//
// Resolutions and dimensions (resolutions with a frame rate) are used
// extensively throughout cast streaming. Since their serialization to and
// from JSON is stable and standard, we have a single place definition for
// these for use both in our public APIs and private messages.
#ifndef CAST_STREAMING_RESOLUTION_H_
#define CAST_STREAMING_RESOLUTION_H_
#include "absl/types/optional.h"
#include "json/value.h"
#include "util/simple_fraction.h"
namespace openscreen {
namespace cast {
// A resolution in pixels.
struct Resolution {
static bool TryParse(const Json::Value& value, Resolution* out);
bool IsValid() const;
Json::Value ToJson() const;
// Returns true if both |width| and |height| of this instance are greater than
// or equal to that of |other|.
bool IsSupersetOf(const Resolution& other) const;
bool operator==(const Resolution& other) const;
bool operator!=(const Resolution& other) const;
// Width and height in pixels.
int width = 0;
int height = 0;
};
// A resolution in pixels and a frame rate.
struct Dimensions {
static bool TryParse(const Json::Value& value, Dimensions* out);
bool IsValid() const;
Json::Value ToJson() const;
// Returns true if all properties of this instance are greater than or equal
// to those of |other|.
bool IsSupersetOf(const Dimensions& other) const;
bool operator==(const Dimensions& other) const;
bool operator!=(const Dimensions& other) const;
// Get just the width and height fields (for comparisons).
constexpr Resolution ToResolution() const { return {width, height}; }
// The effective bit rate is the width * height * frame rate.
constexpr int effective_bit_rate() const {
return width * height * static_cast<double>(frame_rate);
}
// Width and height in pixels.
int width = 0;
int height = 0;
// |frame_rate| is the maximum maintainable frame rate.
SimpleFraction frame_rate{0, 1};
};
} // namespace cast
} // namespace openscreen
#endif // CAST_STREAMING_RESOLUTION_H_
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