C++ (Cpp) exynos_v4l2_g_ctrl Examples

Example #1

File: ExynosHWCService.cpp Project: childofthehorn/android_hardware_samsung_slsi_exynos5-insignal

uint32_t ExynosHWCService::getHdmiAudioChannel()
{
    int channels;
    if (exynos_v4l2_g_ctrl(mHWCCtx->hdmi_layers[0].fd,
            V4L2_CID_TV_GET_AUDIO_INFORM, &channels) < 0)
            // V4L2_CID_TV_MAX_AUDIO_CHANNELS, &channels) < 0)
        ALOGE("%s: failed to get audio channels", __func__);
    return channels;
}

Example #2

File: exynos_rotator.c Project: AndroidStudio/android-4.2_r1

static bool m_exynos_rotator_set_format(
    int                  fd,
    struct rotator_info *info,
    bool                 force)
{
    struct v4l2_requestbuffers req_buf;
    int                        plane_count;

    plane_count = m_rotator_get_plane_count(info->v4l2_colorformat);
    if (plane_count < 0) {
        ALOGE("%s::not supported v4l2_colorformat", __func__);
        return false;
    }

    if (force == false) {
        // format
        info->format.type = info->buf_type;
        if (exynos_v4l2_g_fmt(fd, &info->format) < 0) {
            ALOGE("%s::exynos_v4l2_g_fmt() fail type=%d", __func__, info->buf_type);
            return false;
        }

        if (info->width            != info->format.fmt.pix_mp.width ||
            info->height           != info->format.fmt.pix_mp.height ||
            info->v4l2_colorformat != info->format.fmt.pix_mp.pixelformat) {
            ALOGV("%s::info is different..)", __func__);
            goto set_hw;
        }

        // crop
        if (info->buf_type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
        info->crop.type = info->buf_type;
        if (exynos_v4l2_g_crop(fd, &info->crop) < 0) {
            ALOGE("%s::exynos_v4l2_g_crop() fail", __func__);
            return false;
        }

        if (info->crop_left   != info->crop.c.left ||
            info->crop_top    != info->crop.c.top ||
            info->crop_width  != info->crop.c.width ||
            info->crop_height != info->crop.c.height) {
            ALOGV("%s::crop is different..", __func__);
            goto set_hw;
        }
        }

        // rotation value;

        int value = 0;

        if (exynos_v4l2_g_ctrl(fd, V4L2_CID_ROTATE, &value) < 0) {
            ALOGE("%s::exynos_v4l2_g_ctrl(V4L2_CID_ROTATE) fail");
            return false;
        }

        if (info->rotation != value) {
            ALOGV("%s::rotation is different..", __func__);
            goto set_hw;
        }

        // skip s_fmt
        ALOGV("%s::fmt, crop is same with old-one, so skip s_fmt crop..", __func__);
        return true;
    }

set_hw:

    if (info->stream_on == true) {
        if (exynos_v4l2_streamoff(fd, info->buf_type) < 0) {
            ALOGE("%s::exynos_v4l2_streamoff() fail", __func__);
            return false;
        }
        info->stream_on = false;
    }

    if (exynos_v4l2_s_ctrl(fd, V4L2_CID_ROTATE, info->rotation) < 0) {
        ALOGE("%s::exynos_v4l2_s_ctrl(V4L2_CID_ROTATE) fail", __func__);
        return false;
    }

    info->format.fmt.pix_mp.width       = info->width;
    info->format.fmt.pix_mp.height      = info->height;
    info->format.fmt.pix_mp.pixelformat = info->v4l2_colorformat;
    info->format.fmt.pix_mp.field       = V4L2_FIELD_ANY;
    info->format.fmt.pix_mp.num_planes  = plane_count;

    if (exynos_v4l2_s_fmt(fd, &info->format) < 0) {
        ALOGE("%s::exynos_v4l2_s_fmt() fail", __func__);
        return false;
    }

    if (info->buf_type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
    info->crop.type     = info->buf_type;
    info->crop.c.left   = info->crop_left;
    info->crop.c.top    = info->crop_top;
    info->crop.c.width  = info->crop_width;
    info->crop.c.height = info->crop_height;

    if (exynos_v4l2_s_crop(fd, &info->crop) < 0) {
        ALOGE("%s::exynos_v4l2_s_crop() fail", __func__);
        return false;
    }
    }

    if (exynos_v4l2_s_ctrl(fd, V4L2_CID_CACHEABLE, info->cacheable) < 0) {
        ALOGE("%s::exynos_v4l2_s_ctrl() fail", __func__);
        return false;
    }

    req_buf.count  = 1;
    req_buf.type   = info->buf_type;
    req_buf.memory = V4L2_MEMORY_USERPTR;
    if (exynos_v4l2_reqbufs(fd, &req_buf) < 0) {
        ALOGE("%s::exynos_v4l2_reqbufs() fail", __func__);
        return false;
    }

    return true;
}