chromium/third_party/openscreen/src/cast/streaming/public/answer_messages.h

// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CAST_STREAMING_PUBLIC_ANSWER_MESSAGES_H_
#define CAST_STREAMING_PUBLIC_ANSWER_MESSAGES_H_

#include <array>
#include <chrono>
#include <cstdint>
#include <initializer_list>
#include <memory>
#include <optional>
#include <string>
#include <utility>
#include <vector>

#include "cast/streaming/resolution.h"
#include "cast/streaming/ssrc.h"
#include "json/value.h"
#include "platform/base/error.h"
#include "util/simple_fraction.h"

namespace openscreen::cast {

// For each of the below classes, though a number of methods are shared, the use
// of a shared base class has intentionally been avoided. This is to improve
// readability of the structs provided in this file by cutting down on the
// amount of obscuring boilerplate code. For each of the following struct
// definitions, the following method definitions are shared:
// (1) TryParse. Shall return a boolean indicating whether the out
//     parameter is in a valid state after checking bounds and restrictions.
// (2) ToJson. Should return a proper JSON object. Assumes that IsValid()
//     has been called already, OSP_CHECKs if not IsValid().
// (3) IsValid. Used by both TryParse and ToJson to ensure that the
//     object is in a good state.
struct AudioConstraints { … };

struct VideoConstraints { … };

struct Constraints { … };

// Decides whether the Sender scales and letterboxes content to 16:9, or if
// it may send video frames of any arbitrary size and the Receiver must
// handle the presentation details.
enum class AspectRatioConstraint : uint8_t { … };

struct AspectRatio { … };

struct DisplayDescription { … };

struct Answer { … };

}  // namespace openscreen::cast

#endif  // CAST_STREAMING_PUBLIC_ANSWER_MESSAGES_H_