C++ (Cpp) av_popcount64 Examples

Example #1

File: pthread.c Project: adesurya/gst-mobile

static int get_logical_cpus(AVCodecContext *avctx)
{
    int ret, nb_cpus = 1;
#if HAVE_SCHED_GETAFFINITY && defined(CPU_COUNT)
    cpu_set_t cpuset;

    CPU_ZERO(&cpuset);

    ret = sched_getaffinity(0, sizeof(cpuset), &cpuset);
    if (!ret) {
        nb_cpus = CPU_COUNT(&cpuset);
    }
#elif HAVE_GETPROCESSAFFINITYMASK
    DWORD_PTR proc_aff, sys_aff;
    ret = GetProcessAffinityMask(GetCurrentProcess(), &proc_aff, &sys_aff);
    if (ret)
        nb_cpus = av_popcount64(proc_aff);
#elif HAVE_SYSCTL && defined(HW_NCPU)
    int mib[2] = { CTL_HW, HW_NCPU };
    size_t len = sizeof(nb_cpus);

    ret = sysctl(mib, 2, &nb_cpus, &len, NULL, 0);
    if (ret == -1)
        nb_cpus = 0;
#elif HAVE_SYSCONF && defined(_SC_NPROC_ONLN)
    nb_cpus = sysconf(_SC_NPROC_ONLN);
#elif HAVE_SYSCONF && defined(_SC_NPROCESSORS_ONLN)
    nb_cpus = sysconf(_SC_NPROCESSORS_ONLN);
#endif
    av_log(avctx, AV_LOG_DEBUG, "detected %d logical cores\n", nb_cpus);
    return nb_cpus;
}

Example #2

File: channel_layout.c Project: zhanjx1314/vc-ffmpeg2

int av_get_channel_layout_nb_channels(uint64_t channel_layout)
{
    return av_popcount64(channel_layout);
}