Merge "avc_utils: check delta_scale range to avoid overflow"

    for (size_t j = 0; j < sizeOfScalingList; ++j) {

        if (nextScale != 0) {

            signed delta_scale = parseSE(br);

            nextScale = (lastScale + delta_scale + 256) % 256;

            // ISO_IEC_14496-10_201402-ITU, 7.4.2.1.1.1, The value of delta_scale

            // shall be in the range of −128 to +127, inclusive.

            if (delta_scale < -128) {

                ALOGW("delta_scale (%d) is below range, capped to -128", delta_scale);

                delta_scale = -128;

            } else if (delta_scale > 127) {

                ALOGW("delta_scale (%d) is above range, capped to 127", delta_scale);

                delta_scale = 127;

            }

            nextScale = (lastScale + (delta_scale + 256)) % 256;

        }

        lastScale = (nextScale == 0) ? lastScale : nextScale;