Function av_log_windebug_callback

src/core/ffms.cpp:45–75

#ifdef FFMS_WIN_DEBUG

static void av_log_windebug_callback(void* ptr, int level, const char* fmt, va_list vl) {
    if (level > av_log_get_level())
        return;

    static int print_prefix = 1;
    static int count;
    static char line[1024] = {}, prev[1024] = {};
    auto avc = ptr ? *static_cast<AVClass **>(ptr) : nullptr;

    int written = 0;
    if (print_prefix && avc) {
        written = snprintf(line, sizeof(line), "[%s @ %p]", avc->item_name(ptr), ptr);
    }

    written += vsnprintf(line + written, sizeof(line) - written, fmt, vl);

    print_prefix = line[written - 1] == '\n';
    line[sizeof(line) - 1] = 0;
    if (print_prefix && !strcmp(line, prev)) {
        count++;
        return;
    }
    if (count > 0) {
        std::stringstream ss;
        ss << "    Last message repeated " << count << " times\n";
        OutputDebugStringA(ss.str().c_str());
        count = 0;
    }
    OutputDebugStringA(line);
    strcpy(prev, line);
}

#endif