创建回调方法
接下来创建回调方法，返回本地和远端的视频帧
//VideoCall.cpp
void VideoCall::RegisterOnLocalFrameCallback(
std::function<void(std::uint8_t*, std::uint32_t, std::uint32_t, std::uint32_t)> OnFrameCallback)
{
OnLocalFrameCallback = std::move(OnFrameCallback);
}
void VideoCall::RegisterOnRemoteFrameCallback(
std::function<void(std::uint8_t*, std::uint32_t, std::uint32_t, std::uint32_t)> OnFrameCallback)
{
OnRemoteFrameCallback = std::move(OnFrameCallback);
}
创建呼叫方法
我们需要利用这个方法来实现“加入频道”和“离开频道”。
增加 StartCall
首先创建 VideoFrameObserver 对象，然后根据你的场景来设置以下回调。
OnLocalFrameCallback：用于 SDK 获取本地摄像头采集到的视频帧。 OnRemoteFrameCallback：用于 SDK 获取远端摄像头采集到的视频帧。在 InitAgora 的 MediaEngine 对象中通过 registerVideoFrameObserver 方法注册 VideoFrameObserver。为了保证 EncryptionType 和 EncryptionKey 不为空，需要先设置 EncryptionMode 和 EncryptionSecret。然后按照你的需要来设置频道参数，并调用 joinChannel。
//VideoCall.cpp
void VideoCall::StartCall(
const FString& ChannelName,
const FString& EncryptionKey,
const FString& EncryptionType)
{
if (!RtcEnginePtr)
{
return;
}
if (MediaEnginePtr)
{
if (!VideoFrameObserverPtr)
{
VideoFrameObserverPtr = MakeUnique<VideoFrameObserver>();
std::function<void(std::uint8_t*, std::uint32_t, std::uint32_t, std::uint32_t)> OnCaptureVideoFrameCallback
= [this](std::uint8_t* buffer, std::uint32_t width, std::uint32_t height, std::uint32_t size)
{
if (OnLocalFrameCallback)
{
OnLocalFrameCallback(buffer, width, height, size);
}
else { UE_LOG(LogTemp, Warning, TEXT("VideoCall OnLocalFrameCallback isn't set")); }
};
VideoFrameObserverPtr->setOnCaptureVideoFrameCallback(std::move(OnCaptureVideoFrameCallback));
std::function<void(std::uint8_t*, std::uint32_t, std::uint32_t, std::uint32_t)> OnRenderVideoFrameCallback
= [this](std::uint8_t* buffer, std::uint32_t width, std::uint32_t height, std::uint32_t size)
{
if (OnRemoteFrameCallback)
{
OnRemoteFrameCallback(buffer, width, height, size);
}
else { UE_LOG(LogTemp, Warning, TEXT("VideoCall OnRemoteFrameCallback isn't set")); }
};
VideoFrameObserverPtr->setOnRenderVideoFrameCallback(std::move(OnRenderVideoFrameCallback));
}
MediaEnginePtr->registerVideoFrameObserver(VideoFrameObserverPtr.Get());
}
int nRet = RtcEnginePtr->enableVideo();
if (nRet < 0)
{
UE_LOG(LogTemp, Warning, TEXT("enableVideo : %d"), nRet)
}
if (!EncryptionType.IsEmpty() && !EncryptionKey.IsEmpty())
{
if (EncryptionType == "aes-256")
{
RtcEnginePtr->setEncryptionMode("aes-256-xts");
}
else
{
RtcEnginePtr->setEncryptionMode("aes-128-xts");
}
nRet = RtcEnginePtr->setEncryptionSecret(TCHAR_TO_ANSI(*EncryptionKey));
if (nRet < 0)
{
UE_LOG(LogTemp, Warning, TEXT("setEncryptionSecret : %d"), nRet)
}
}
nRet = RtcEnginePtr->setChannelProfile(agora::rtc::CHANNEL_PROFILE_COMMUNICATION);
if (nRet < 0)
{
UE_LOG(LogTemp, Warning, TEXT("setChannelProfile : %d"), nRet)
}
//"demoChannel1";
std::uint32_t nUID = 0;
nRet = RtcEnginePtr->joinChannel(NULL, TCHAR_TO_ANSI(*ChannelName), NULL, nUID);
if (nRet < 0)
{
UE_LOG(LogTemp, Warning, TEXT("joinChannel ret: %d"), nRet);
}
}
