コード例 #1
0
/*
 * Query the camera to retrieve the supported video frame sizes
 * and also to see whether CameraParameters::setVideoSize()
 * is supported or not.
 * @param params CameraParameters to retrieve the information
 * @@param isSetVideoSizeSupported retunrs whether method
 *      CameraParameters::setVideoSize() is supported or not.
 * @param sizes returns the vector of Size objects for the
 *      supported video frame sizes advertised by the camera.
 */
static void getSupportedVideoSizes(
    const CameraParameters& params,
    bool *isSetVideoSizeSupported,
    Vector<Size>& sizes) {

    *isSetVideoSizeSupported = true;
    params.getSupportedVideoSizes(sizes);
    if (sizes.size() == 0) {
        ALOGD("Camera does not support setVideoSize()");
        params.getSupportedPreviewSizes(sizes);
        *isSetVideoSizeSupported = false;
    }
}
コード例 #2
0
/*
 * Check whether the requested video frame size
 * has been successfully configured or not. If both width and height
 * are -1, check on the current width and height value setting
 * is performed.
 *
 * @param params CameraParameters to retrieve the information
 * @param the target video frame width in pixels to check against
 * @param the target video frame height in pixels to check against
 * @return OK if no error
 */
status_t CameraSource::checkVideoSize(
        const CameraParameters& params,
        int32_t width, int32_t height) {

    ALOGV("checkVideoSize");
    // The actual video size is the same as the preview size
    // if the camera hal does not support separate video and
    // preview output. In this case, we retrieve the video
    // size from preview.
    int32_t frameWidthActual = -1;
    int32_t frameHeightActual = -1;
    Vector<Size> sizes;
    params.getSupportedVideoSizes(sizes);
    if (sizes.size() == 0) {
        // video size is the same as preview size
        params.getPreviewSize(&frameWidthActual, &frameHeightActual);
    } else {
        // video size may not be the same as preview
        params.getVideoSize(&frameWidthActual, &frameHeightActual);
    }
    if (frameWidthActual < 0 || frameHeightActual < 0) {
        ALOGE("Failed to retrieve video frame size (%dx%d)",
                frameWidthActual, frameHeightActual);
        return UNKNOWN_ERROR;
    }

    // Check the actual video frame size against the target/requested
    // video frame size.
    if (width != -1 && height != -1) {
        if (frameWidthActual != width || frameHeightActual != height) {
            ALOGE("Failed to set video frame size to %dx%d. "
                    "The actual video size is %dx%d ", width, height,
                    frameWidthActual, frameHeightActual);
            return UNKNOWN_ERROR;
        }
    }

    // Good now.
    mVideoSize.width = frameWidthActual;
    mVideoSize.height = frameHeightActual;
    return OK;
}