Exemples de code C++ du Video Fingerprinting SDK¶

// vfp_gen.cpp - Générer une empreinte à partir d'un fichier vidéo
#include <VisioForge_VFP.h>

int main()
{
    VFPSetLicenseKey(L"TRIAL");

    VFPFingerprintSource src{};
    VFPFillSource(L"input.mp4", &src);

    VFPFingerPrint fp{};
    VFPSearch_GetFingerprintForVideoFile(src, &fp);

    VFPFingerprintSave(&fp, L"output.vfpsig");
    printf("Empreinte enregistrée : %d octets\n", fp.DataSize);
    return 0;
}

// vfp_compare.cpp - Comparer deux empreintes
#include <VisioForge_VFP.h>

int main()
{
    VFPSetLicenseKey(L"TRIAL");

    VFPFingerPrint fp1{}, fp2{};
    VFPFingerprintLoad(&fp1, L"video1.vfpsig");
    VFPFingerprintLoad(&fp2, L"video2.vfpsig");

    double diff = VFPCompare_Compare(fp1.Data, fp1.DataSize,
                                     fp2.Data, fp2.DataSize, 10);

    printf("Différence : %.2f\n", diff);
    if (diff < 100)       printf("Très similaires\n");
    else if (diff < 500)  printf("Quelques similarités\n");
    else                  printf("Différentes\n");

    return 0;
}

// vfp_search.cpp - Rechercher un fragment dans une vidéo plus longue
#include <VisioForge_VFP.h>

int main()
{
    VFPSetLicenseKey(L"TRIAL");

    VFPFingerPrint needle{}, haystack{};
    VFPFingerprintLoad(&needle, L"fragment.vfpsig");
    VFPFingerprintLoad(&haystack, L"full_video.vfpsig");

    double diff = 0;
    int pos = VFPSearch_Search2(&needle, 0, &haystack, 0, &diff, 300);
    if (pos != INT_MAX)
        printf("Trouvé à %d secondes (diff : %.2f)\n", pos, diff);

    return 0;
}
               results[i].startMs, results[i].endMs, results[i].difference);

    return 0;
}

#include <thread>
#include <vector>
#include <queue>
#include <mutex>

class FingerprintProcessor {
private:
    std::queue<std::string> videoQueue;
    std::mutex queueMutex;

public:
    void ProcessVideos(const std::vector<std::string>& videos) {
        const int numThreads = std::thread::hardware_concurrency();
        std::vector<std::thread> workers;

        // Remplir la file
        for (const auto& video : videos) {
            videoQueue.push(video);
        }

        // Démarrer les threads worker
        for (int i = 0; i < numThreads; i++) {
            workers.emplace_back(&FingerprintProcessor::Worker, this);
        }

        // Attendre la fin
        for (auto& worker : workers) {
            worker.join();
        }
    }

private:
    void Worker() {
        while (true) {
            std::string video;
            {
                std::lock_guard<std::mutex> lock(queueMutex);
                if (videoQueue.empty()) break;
                video = videoQueue.front();
                videoQueue.pop();
            }

            ProcessVideo(video);
        }
    }

    void ProcessVideo(const std::string& video)
    {
        VFPFingerprintSource src{};
        std::wstring wpath(video.begin(), video.end());
        VFPFillSource(wpath.c_str(), &src);

        VFPFingerPrint fp{};
        VFPSearch_GetFingerprintForVideoFile(src, &fp);
        // Stocker fp.Data / fp.DataSize
    }
};

// Exemple utilisant SQLite pour le stockage des empreintes
#include <sqlite3.h>

class FingerprintDatabase {
private:
    sqlite3* db;

public:
    void StoreFingerprint(const std::string& videoPath, 
                         const std::vector<uint8_t>& fingerprint) {
        const char* sql = "INSERT INTO fingerprints (path, data) VALUES (?, ?)";
        sqlite3_stmt* stmt;
        sqlite3_prepare_v2(db, sql, -1, &stmt, nullptr);

        sqlite3_bind_text(stmt, 1, videoPath.c_str(), -1, SQLITE_STATIC);
        sqlite3_bind_blob(stmt, 2, fingerprint.data(), 
                         fingerprint.size(), SQLITE_STATIC);

        sqlite3_step(stmt);
        sqlite3_finalize(stmt);
    }

    std::vector<uint8_t> LoadFingerprint(const std::string& videoPath) {
        const char* sql = "SELECT data FROM fingerprints WHERE path = ?";
        sqlite3_stmt* stmt;
        sqlite3_prepare_v2(db, sql, -1, &stmt, nullptr);

        sqlite3_bind_text(stmt, 1, videoPath.c_str(), -1, SQLITE_STATIC);

        std::vector<uint8_t> fingerprint;
        if (sqlite3_step(stmt) == SQLITE_ROW) {
            const void* data = sqlite3_column_blob(stmt, 0);
            int size = sqlite3_column_bytes(stmt, 0);

            fingerprint.resize(size);
            memcpy(fingerprint.data(), data, size);
        }

        sqlite3_finalize(stmt);
        return fingerprint;
    }
};