rbsp_write_bit
ret = rbsp_write_bit(rbsp, (value >> n) & 1);
return rbsp_write_bit(rbsp, *value);
ret = rbsp_write_bit(rbsp, (value >> num) & 1);
ret = rbsp_write_bit(rbsp, 0);
ret = rbsp_write_bit(&sps, frame_cropping_flag);
ret = rbsp_write_bit(&sps, 0); /* vui_parameters_present_flag */
ret = rbsp_write_bit(&sps, 1);