Video SDK Windows

#include <windows.h>
#include "zoom_video_sdk_api.h"
#include "zoom_video_sdk_interface.h"
#include "zoom_video_sdk_delegate_interface.h"

USING_ZOOM_VIDEO_SDK_NAMESPACE

// 1. Create SDK object
IZoomVideoSDK* video_sdk_obj = CreateZoomVideoSDKObj();

// 2. Initialize
ZoomVideoSDKInitParams init_params;
init_params.domain = L"https://zoom.us";
init_params.enableLog = true;
init_params.logFilePrefix = L"zoom_win_video";
init_params.videoRawDataMemoryMode = ZoomVideoSDKRawDataMemoryModeHeap;
init_params.shareRawDataMemoryMode = ZoomVideoSDKRawDataMemoryModeHeap;
init_params.audioRawDataMemoryMode = ZoomVideoSDKRawDataMemoryModeHeap;

ZoomVideoSDKErrors err = video_sdk_obj->initialize(init_params);

// 3. Add event listener
video_sdk_obj->addListener(myDelegate);

// 4. Join session (IMPORTANT: set audioOption.connect = false)
ZoomVideoSDKSessionContext session_context;
session_context.sessionName = L"my-session";
session_context.userName = L"Windows User";
session_context.token = L"your-jwt-token";
session_context.videoOption.localVideoOn = false;
session_context.audioOption.connect = false;  // Connect audio after join
session_context.audioOption.mute = true;

IZoomVideoSDKSession* session = video_sdk_obj->joinSession(session_context);

// 5. CRITICAL: Add Windows message pump for callbacks to work
bool running = true;
while (running) {
    // Process Windows messages (required for SDK callbacks)
    MSG msg;
    while (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)) {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }
    
    // Your application logic here
    Sleep(10);
}

using ZoomVideoSDK;

var sdkManager = new ZoomSDKManager();
sdkManager.Initialize();
sdkManager.JoinSession("my-session", "jwt-token", "User Name", "");

while (running) {
    // REQUIRED: Process Windows messages
    MSG msg;
    while (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)) {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }
    
    // Your application logic
    Sleep(10);
}

// During join
session_context.audioOption.connect = false;  // Don't connect yet
session_context.audioOption.mute = true;

// In onSessionJoin() callback
void onSessionJoin() override {
    IZoomVideoSDKAudioHelper* audioHelper = video_sdk_obj->getAudioHelper();
    if (audioHelper) {
        audioHelper->startAudio();  // Connect now
    }
}

// Required even if you don't use them
void onProxyDetectComplete() override {}
void onUserWhiteboardShareStatusChanged(IZoomVideoSDKUser*, IZoomVideoSDKWhiteboardHelper*) override {}
// ... etc

init_params.videoRawDataMemoryMode = ZoomVideoSDKRawDataMemoryModeHeap;
init_params.shareRawDataMemoryMode = ZoomVideoSDKRawDataMemoryModeHeap;
init_params.audioRawDataMemoryMode = ZoomVideoSDKRawDataMemoryModeHeap;

// Subscribe to a user's video with Canvas API
IZoomVideoSDKCanvas* canvas = user->GetVideoCanvas();
if (canvas) {
    ZoomVideoSDKErrors ret = canvas->subscribeWithView(
        hwnd,                                    // Your window handle
        ZoomVideoSDKVideoAspect_PanAndScan,     // Fit to window, may crop
        ZoomVideoSDKResolution_Auto              // Let SDK choose best resolution
    );
    
    if (ret == ZoomVideoSDKErrors_Success) {
        // SDK is now rendering directly to your window!
    }
}

// Unsubscribe when done
canvas->unSubscribeWithView(hwnd);

// Self video preview
IZoomVideoSDKCanvas* canvas = myself->GetVideoCanvas();
canvas->subscribeWithView(selfVideoHwnd, aspect, resolution);

// Remote user video
IZoomVideoSDKCanvas* remoteCanvas = remoteUser->GetVideoCanvas();
remoteCanvas->subscribeWithView(remoteVideoHwnd, aspect, resolution);

// 1. Create a delegate to receive frames
class VideoRenderer : public IZoomVideoSDKRawDataPipeDelegate {
public:
    void onRawDataFrameReceived(YUVRawDataI420* data) override {
        int width = data->GetStreamWidth();
        int height = data->GetStreamHeight();
        
        char* yBuffer = data->GetYBuffer();
        char* uBuffer = data->GetUBuffer();
        char* vBuffer = data->GetVBuffer();
        
        // Convert YUV420 to RGB and render
        ConvertYUVToRGB(yBuffer, uBuffer, vBuffer, width, height);
        RenderToWindow(rgbBuffer, width, height);
    }
    
    void onRawDataStatusChanged(RawDataStatus status) override {
        // Handle video on/off
    }
};

// 2. Subscribe to raw data
IZoomVideoSDKRawDataPipe* pipe = user->GetVideoPipe();
VideoRenderer* renderer = new VideoRenderer();
pipe->subscribe(ZoomVideoSDKResolution_720P, renderer);

void ConvertYUV420ToRGB(char* yBuffer, char* uBuffer, char* vBuffer, 
                        int width, int height) {
    for (int y = 0; y < height; y++) {
        for (int x = 0; x < width; x++) {
            int yIndex = y * width + x;
            int uvIndex = (y / 2) * (width / 2) + (x / 2);
            
            int Y = (unsigned char)yBuffer[yIndex];
            int U = (unsigned char)uBuffer[uvIndex];
            int V = (unsigned char)vBuffer[uvIndex];
            
            // YUV to RGB conversion
            int C = Y - 16;
            int D = U - 128;
            int E = V - 128;
            
            int R = (298 * C + 409 * E + 128) >> 8;
            int G = (298 * C - 100 * D - 208 * E + 128) >> 8;
            int B = (298 * C + 516 * D + 128) >> 8;
            
            // Clamp to [0, 255]
            R = (R < 0) ? 0 : (R > 255) ? 255 : R;
            G = (G < 0) ? 0 : (G > 255) ? 255 : G;
            B = (B < 0) ? 0 : (B > 255) ? 255 : B;
            
            // Store RGB (BGR format for Windows)
            rgbBuffer[yIndex * 3 + 0] = (unsigned char)B;
            rgbBuffer[yIndex * 3 + 1] = (unsigned char)G;
            rgbBuffer[yIndex * 3 + 2] = (unsigned char)R;
        }
    }
}

void RenderToWindow(unsigned char* rgbBuffer, int width, int height) {
    HDC hdc = GetDC(hwnd);
    
    BITMAPINFO bmi = {};
    bmi.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
    bmi.bmiHeader.biWidth = width;
    bmi.bmiHeader.biHeight = -height;  // Negative for top-down
    bmi.bmiHeader.biPlanes = 1;
    bmi.bmiHeader.biBitCount = 24;     // 24-bit RGB
    bmi.bmiHeader.biCompression = BI_RGB;
    
    RECT rect;
    GetClientRect(hwnd, &rect);
    
    StretchDIBits(hdc,
        0, 0, rect.right, rect.bottom,  // Destination
        0, 0, width, height,              // Source
        rgbBuffer, &bmi,
        DIB_RGB_COLORS, SRCCOPY);
    
    ReleaseDC(hwnd, hdc);
}

IZoomVideoSDKSession* session = sdk->getSessionInfo();
IZoomVideoSDKUser* myself = session->getMyself();
IZoomVideoSDKCanvas* canvas = myself->GetVideoCanvas();
canvas->subscribeWithView(selfVideoHwnd, aspect, resolution);

IZoomVideoSDKVideoHelper* videoHelper = sdk->getVideoHelper();
videoHelper->startVideo();  // Start transmission

// For preview rendering
videoHelper->startVideoCanvasPreview(selfVideoHwnd, aspect, resolution);

// In onUserJoin callback
void onUserJoin(IZoomVideoSDKUserHelper*, IVideoSDKVector<IZoomVideoSDKUser*>* userList) {
    for (int i = 0; i < userList->GetCount(); i++) {
        IZoomVideoSDKUser* user = userList->GetItem(i);
        IZoomVideoSDKCanvas* canvas = user->GetVideoCanvas();
        canvas->subscribeWithView(userVideoHwnd, aspect, resolution);
    }
}

class MainFrame : public IZoomVideoSDKDelegate {
private:
    std::map<IZoomVideoSDKUser*, IZoomVideoSDKCanvas*> subscribedUsers_;
    HWND videoWindow_;
    
public:
    void onSessionJoin() override {
        // Start your own video
        IZoomVideoSDKVideoHelper* videoHelper = sdk->getVideoHelper();
        videoHelper->startVideo();
        
        // Subscribe to self video
        IZoomVideoSDKUser* myself = sdk->getSessionInfo()->getMyself();
        SubscribeToUser(myself);
    }
    
    void onUserJoin(IZoomVideoSDKUserHelper*, 
                    IVideoSDKVector<IZoomVideoSDKUser*>* userList) override {
        // Get current user to exclude self
        IZoomVideoSDKUser* myself = sdk->getSessionInfo()->getMyself();
        
        for (int i = 0; i < userList->GetCount(); i++) {
            IZoomVideoSDKUser* user = userList->GetItem(i);
            
            // IMPORTANT: Only subscribe to REMOTE users!
            if (user != myself) {
                SubscribeToUser(user);
            }
        }
    }
    
    void onUserVideoStatusChanged(IZoomVideoSDKVideoHelper*, 
                                  IVideoSDKVector<IZoomVideoSDKUser*>* userList) override {
        IZoomVideoSDKUser* myself = sdk->getSessionInfo()->getMyself();
        
        for (int i = 0; i < userList->GetCount(); i++) {
            IZoomVideoSDKUser* user = userList->GetItem(i);
            if (user != myself) {
                // Re-subscribe when video status changes
                SubscribeToUser(user);
            }
        }
    }
    
    void onUserLeave(IZoomVideoSDKUserHelper*, 
                    IVideoSDKVector<IZoomVideoSDKUser*>* userList) override {
        for (int i = 0; i < userList->GetCount(); i++) {
            IZoomVideoSDKUser* user = userList->GetItem(i);
            UnsubscribeFromUser(user);
        }
    }
    
    void onSessionLeave() override {
        // Cleanup all subscriptions
        for (auto& pair : subscribedUsers_) {
            IZoomVideoSDKCanvas* canvas = pair.second;
            if (canvas) {
                canvas->unSubscribeWithView(videoWindow_);
            }
        }
        subscribedUsers_.clear();
    }
    
private:
    void SubscribeToUser(IZoomVideoSDKUser* user) {
        if (!user || subscribedUsers_.find(user) != subscribedUsers_.end())
            return;
            
        IZoomVideoSDKCanvas* canvas = user->GetVideoCanvas();
        if (canvas) {
            ZoomVideoSDKErrors ret = canvas->subscribeWithView(
                videoWindow_,
                ZoomVideoSDKVideoAspect_PanAndScan,
                ZoomVideoSDKResolution_Auto
            );
            
            if (ret == ZoomVideoSDKErrors_Success) {
                subscribedUsers_[user] = canvas;
            }
        }
    }
    
    void UnsubscribeFromUser(IZoomVideoSDKUser* user) {
        auto it = subscribedUsers_.find(user);
        if (it != subscribedUsers_.end()) {
            IZoomVideoSDKCanvas* canvas = it->second;
            if (canvas) {
                canvas->unSubscribeWithView(videoWindow_);
            }
            subscribedUsers_.erase(it);
        }
    }
};

// WRONG - This won't work for remote screen shares!
user->GetShareCanvas()->subscribeWithView(hwnd, ...);

// CORRECT - Use IZoomVideoSDKShareAction from onUserShareStatusChanged callback
void onUserShareStatusChanged(IZoomVideoSDKShareHelper* pShareHelper,
                               IZoomVideoSDKUser* pUser,
                               IZoomVideoSDKShareAction* pShareAction) {
    if (!pShareAction) return;
    
    ZoomVideoSDKShareStatus status = pShareAction->getShareStatus();
    
    if (status == ZoomVideoSDKShareStatus_Start || 
        status == ZoomVideoSDKShareStatus_Resume) {
        // Subscribe to the share using Canvas API
        IZoomVideoSDKCanvas* shareCanvas = pShareAction->getShareCanvas();
        if (shareCanvas) {
            shareCanvas->subscribeWithView(shareWindow_, 
                ZoomVideoSDKVideoAspect_Original);
        }
    }
    else if (status == ZoomVideoSDKShareStatus_Stop) {
        // Unsubscribe when share stops
        IZoomVideoSDKCanvas* shareCanvas = pShareAction->getShareCanvas();
        if (shareCanvas) {
            shareCanvas->unSubscribeWithView(shareWindow_);
        }
    }
}

// Create separate windows/panels for each user
HWND selfVideoWindow = CreateWindow(...);   // Your video
HWND user1Window = CreateWindow(...);       // User 1's video
HWND user2Window = CreateWindow(...);       // User 2's video

// Subscribe each user to their own window
myself->GetVideoCanvas()->subscribeWithView(selfVideoWindow, ...);
user1->GetVideoCanvas()->subscribeWithView(user1Window, ...);
user2->GetVideoCanvas()->subscribeWithView(user2Window, ...);

video-sdk/windows/
├── SKILL.md                           # Main skill overview
├── SKILL.md                           # This file - navigation guide
├── windows.md                          # Secondary overview doc (pointer-style)
│
├── concepts/                          # Core architectural patterns
│   ├── sdk-architecture-pattern.md   # Universal formula for ANY feature
│   ├── singleton-hierarchy.md        # 5-level navigation guide
│   └── canvas-vs-raw-data.md         # SDK-rendered vs self-rendered choice
│
├── examples/                          # Complete working code
│   ├── session-join-pattern.md       # JWT auth + session join
│   ├── video-rendering.md            # Canvas API video display
│   ├── screen-share-subscription.md  # View remote screen shares
│   ├── raw-video-capture.md          # YUV420 raw frame capture
│   ├── raw-audio-capture.md          # PCM audio capture
│   ├── send-raw-video.md             # Virtual camera (inject video)
│   ├── send-raw-audio.md             # Virtual mic (inject audio)
│   ├── cloud-recording.md            # Cloud recording control
│   ├── command-channel.md            # Custom command messaging
│   ├── transcription.md              # Live transcription/captions
│   └── dotnet-winforms/              # UI Framework integration
│       └── README.md                 # Win32, WinForms, WPF patterns
│                                     # C++/CLI wrapper patterns
│                                     # Production quality guidelines
│
├── troubleshooting/                   # Problem solving guides
│   ├── windows-message-loop.md       # CRITICAL - Why callbacks fail
│   ├── build-errors.md               # Header dependency fixes
│   └── common-issues.md              # Quick diagnostic workflow
│
└── references/                        # Reference documentation
    ├── windows-reference.md           # API hierarchy, methods, error codes
    ├── delegate-methods.md            # All 80+ callback methods
    └── samples.md                     # Official samples guide